<?xml version="1.0" encoding="us-ascii"?>
<!-- Created by Merrill Corporation -->
<!-- Generated by Fujitsu Interstage XWand B0166_M01 -->
<!--Generated by IRIS XBRL Generation Engine-->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationTables" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureStockBasedCompensationTables" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureStockBasedCompensationDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails2" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureStockBasedCompensationDetails2" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails3" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureStockBasedCompensationDetails3" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureCommonEquityDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureCommonEquityDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureShortTermDebtAndLinesOfCreditDetails2" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureShortTermDebtAndLinesOfCreditDetails2" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails2" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureFairValueDetails2" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureRelatedPartyTransactionsDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureRegulatoryEnvironmentDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureRegulatoryEnvironmentDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureShortTermDebtAndLinesOfCreditDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureShortTermDebtAndLinesOfCreditDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureRiskManagementActivitiesDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureRiskManagementActivitiesDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureRiskManagementActivitiesDetails2" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureRiskManagementActivitiesDetails2" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureFairValueDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails3" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureFairValueDetails3" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureCommitmentsAndContingenciesDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureCommitmentsAndContingenciesDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureSegmentsOfBusinessDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureSegmentsOfBusinessDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureCommitmentsAndContingenciesDetails2" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureCommitmentsAndContingenciesDetails2" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureEmployeeBenefitPlansDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureEmployeeBenefitPlansDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails4" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureFairValueDetails4" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureMiscellaneousIncomeDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureMiscellaneousIncomeDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureLongTermDebtDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureLongTermDebtDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureAgreementToPurchaseFoxEnergyCenterDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureAgreementToPurchaseFoxEnergyCenterDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureVariableInterestEntitiesDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/DisclosureFinancialInformationDetails" xlink:type="simple" xlink:href="wps-20120930.xsd#DisclosureFinancialInformationDetails" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/BalanceSheet" xlink:type="simple" xlink:href="wps-20120930.xsd#BalanceSheet" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/StatementOfIncome" xlink:type="simple" xlink:href="wps-20120930.xsd#StatementOfIncome" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/CashFlows" xlink:type="simple" xlink:href="wps-20120930.xsd#CashFlows" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/StatementsOfCommonShareholdersEquity" xlink:type="simple" xlink:href="wps-20120930.xsd#StatementsOfCommonShareholdersEquity" />
  <link:roleRef roleURI="http://www.wisconsinpublicservice.com/role/StatementOfCapitalization" xlink:type="simple" xlink:href="wps-20120930.xsd#StatementOfCapitalization" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationTables">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="AwardTypeAxis" xlink:title="AwardTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="AwardTypeAxis" xlink:title="definition: ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to AwardTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="AwardTypeAxis" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="definition: AwardTypeAxis to ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PerformanceStockRightsEquityAwardsMember" xlink:label="PerformanceStockRightsEquityAwardsMember" xlink:title="PerformanceStockRightsEquityAwardsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceStockRightsEquityAwardsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceStockRightsEquityAwardsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PerformanceStockRightsLiabilityAwardMember" xlink:label="PerformanceStockRightsLiabilityAwardMember" xlink:title="PerformanceStockRightsLiabilityAwardMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceStockRightsLiabilityAwardMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceStockRightsLiabilityAwardMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="PerformanceSharesMember" xlink:title="PerformanceSharesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceSharesMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceSharesMember" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" xlink:label="ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" xlink:title="ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" use="optional" order="2.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="AwardTypeAxis" xlink:title="AwardTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="AwardTypeAxis" xlink:title="definition: ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to AwardTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="AwardTypeAxis" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="definition: AwardTypeAxis to ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="AwardTypeAxis" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2" xlink:title="definition: AwardTypeAxis to ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="PerformanceSharesMember" xlink:title="PerformanceSharesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceSharesMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceSharesMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="StockOptionsMember" xlink:title="StockOptionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="StockOptionsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to StockOptionsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RestrictedSharesAndRestrictedShareUnitsMember" xlink:label="RestrictedSharesAndRestrictedShareUnitsMember" xlink:title="RestrictedSharesAndRestrictedShareUnitsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="RestrictedSharesAndRestrictedShareUnitsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to RestrictedSharesAndRestrictedShareUnitsMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="AllocatedShareBasedCompensationExpense" xlink:title="AllocatedShareBasedCompensationExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="AllocatedShareBasedCompensationExpense" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to AllocatedShareBasedCompensationExpense" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:title="EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" use="optional" order="3.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails2">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="AwardTypeAxis" xlink:title="AwardTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="AwardTypeAxis" xlink:title="definition: ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to AwardTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="AwardTypeAxis" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="definition: AwardTypeAxis to ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="StockOptionsMember" xlink:title="StockOptionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="StockOptionsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to StockOptionsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:title="StockIssuedDuringPeriodSharesStockOptionsExercised" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward to StockIssuedDuringPeriodSharesStockOptionsExercised" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriod" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward to ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward to ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriodWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriodWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriodWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTransfersInPeriodWeightedAverageGrantDateFairValue" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:title="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:to="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract to SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:title="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:to="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract to SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:title="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:to="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract to SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:label="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:title="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" use="optional" order="8001.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" xlink:label="EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" xlink:title="EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" use="optional" order="8002.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureStockBasedCompensationDetails3">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="AwardTypeAxis" xlink:title="AwardTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="AwardTypeAxis" xlink:title="definition: ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to AwardTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="AwardTypeAxis" xlink:to="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="definition: AwardTypeAxis to ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PerformanceStockRightsEquityAwardsMember" xlink:label="PerformanceStockRightsEquityAwardsMember" xlink:title="PerformanceStockRightsEquityAwardsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceStockRightsEquityAwardsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceStockRightsEquityAwardsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PerformanceStockRightsLiabilityAwardMember" xlink:label="PerformanceStockRightsLiabilityAwardMember" xlink:title="PerformanceStockRightsLiabilityAwardMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceStockRightsLiabilityAwardMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceStockRightsLiabilityAwardMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="PerformanceSharesMember" xlink:title="PerformanceSharesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="PerformanceSharesMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to PerformanceSharesMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RestrictedSharesAndRestrictedShareUnitsMember" xlink:label="RestrictedSharesAndRestrictedShareUnitsMember" xlink:title="RestrictedSharesAndRestrictedShareUnitsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="RestrictedSharesAndRestrictedShareUnitsMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to RestrictedSharesAndRestrictedShareUnitsMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="RestrictedStockUnitsRSUMember" xlink:title="RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="RestrictedStockUnitsRSUMember" xlink:title="definition: ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to RestrictedStockUnitsRSUMember" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="RangeAxis" xlink:title="RangeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="RangeAxis" xlink:title="definition: ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to RangeAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="RangeMember" xlink:title="RangeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RangeAxis" xlink:to="RangeMember" xlink:title="definition: RangeAxis to RangeMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="RangeMember_2" xlink:title="RangeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RangeAxis" xlink:to="RangeMember_2" xlink:title="definition: RangeAxis to RangeMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="MinimumMember" xlink:title="MinimumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MinimumMember" xlink:title="definition: RangeMember to MinimumMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="MaximumMember" xlink:title="MaximumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MaximumMember" xlink:title="definition: RangeMember to MaximumMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeriodOfHistoricalVolatilityUsedToEstimateExpectedVolatilityRate" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModification" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModification" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModification" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModification" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModification" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalent" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalent" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalent" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalent" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersInPeriod" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" use="optional" order="9.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModificationsWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModificationsWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModificationsWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModificationsWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardModificationsWeightedAverageGrantDateFairValue" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTransfersWeightedAverageGrantDateFairValue" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardDividendEquivalentWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardDividendEquivalentWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardDividendEquivalentWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardDividendEquivalentWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardDividendEquivalentWeightedAverageGrantDateFairValue" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" use="optional" order="9.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEndOfPerformancePeriodForWhichEmployeesCannotChangeElectionToDeferValueOfAwardIntoDeferredCompensationPlan" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEndOfPerformancePeriodForWhichEmployeesCannotChangeElectionToDeferValueOfAwardIntoDeferredCompensationPlan" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEndOfPerformancePeriodForWhichEmployeesCannotChangeElectionToDeferValueOfAwardIntoDeferredCompensationPlan" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEndOfPerformancePeriodForWhichEmployeesCannotChangeElectionToDeferValueOfAwardIntoDeferredCompensationPlan" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEndOfPerformancePeriodForWhichEmployeesCannotChangeElectionToDeferValueOfAwardIntoDeferredCompensationPlan" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:label="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:title="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriodTotalIntrinsicValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriodTotalIntrinsicValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriodTotalIntrinsicValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriodTotalIntrinsicValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriodTotalIntrinsicValue" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromDistributionOfShares" xlink:label="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromDistributionOfShares" xlink:title="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromDistributionOfShares" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromDistributionOfShares" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromDistributionOfShares" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue" use="optional" order="8001.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfShares" xlink:label="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfShares" xlink:title="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfShares" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:to="EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfShares" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract to EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfShares" use="optional" order="8002.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingPerformancePeriodForWhichFairValueOnPlanModificationDateIsUsedToMeasureAwards" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingPerformancePeriodForWhichFairValueOnPlanModificationDateIsUsedToMeasureAwards" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingPerformancePeriodForWhichFairValueOnPlanModificationDateIsUsedToMeasureAwards" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingPerformancePeriodForWhichFairValueOnPlanModificationDateIsUsedToMeasureAwards" xlink:title="definition: ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingPerformancePeriodForWhichFairValueOnPlanModificationDateIsUsedToMeasureAwards" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureCommonEquityDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="RangeAxis" xlink:title="RangeAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="RangeMember" xlink:title="RangeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RangeAxis" xlink:to="RangeMember" xlink:title="definition: RangeAxis to RangeMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="MinimumMember" xlink:title="MinimumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MinimumMember" xlink:title="definition: RangeMember to MinimumMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="MaximumMember" xlink:title="MaximumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MaximumMember" xlink:title="definition: RangeMember to MaximumMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DividendPaymentRestrictionsLineItems" xlink:label="DividendPaymentRestrictionsLineItems" xlink:title="DividendPaymentRestrictionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ScheduleOfDividendPaymentRestrictionsTable" xlink:label="ScheduleOfDividendPaymentRestrictionsTable" xlink:title="ScheduleOfDividendPaymentRestrictionsTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="ScheduleOfDividendPaymentRestrictionsTable" xlink:title="definition: DividendPaymentRestrictionsLineItems to ScheduleOfDividendPaymentRestrictionsTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" xlink:title="LegalEntityAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfDividendPaymentRestrictionsTable" xlink:to="LegalEntityAxis" xlink:title="definition: ScheduleOfDividendPaymentRestrictionsTable to LegalEntityAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain" xlink:title="EntityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" xlink:title="definition: LegalEntityAxis to EntityDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain_2" xlink:title="EntityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="LegalEntityAxis" xlink:to="EntityDomain_2" xlink:title="definition: LegalEntityAxis to EntityDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="ParentCompanyMember" xlink:title="ParentCompanyMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="ParentCompanyMember" xlink:title="definition: EntityDomain to ParentCompanyMember" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfDividendPaymentRestrictionsTable" xlink:to="RangeAxis" xlink:title="definition: ScheduleOfDividendPaymentRestrictionsTable to RangeAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthorityAxis" xlink:label="RegulatoryAuthorityAxis" xlink:title="RegulatoryAuthorityAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfDividendPaymentRestrictionsTable" xlink:to="RegulatoryAuthorityAxis" xlink:title="definition: ScheduleOfDividendPaymentRestrictionsTable to RegulatoryAuthorityAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthorityDomain" xlink:label="RegulatoryAuthorityDomain" xlink:title="RegulatoryAuthorityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RegulatoryAuthorityAxis" xlink:to="RegulatoryAuthorityDomain" xlink:title="definition: RegulatoryAuthorityAxis to RegulatoryAuthorityDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WisconsinMember" xlink:label="WisconsinMember" xlink:title="WisconsinMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryAuthorityDomain" xlink:to="WisconsinMember" xlink:title="definition: RegulatoryAuthorityDomain to WisconsinMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PercentageOfPreviousPeriodDividendAsRestrictionOnCurrentPeriodDividends" xlink:label="PercentageOfPreviousPeriodDividendAsRestrictionOnCurrentPeriodDividends" xlink:title="PercentageOfPreviousPeriodDividendAsRestrictionOnCurrentPeriodDividends" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="PercentageOfPreviousPeriodDividendAsRestrictionOnCurrentPeriodDividends" xlink:title="definition: DividendPaymentRestrictionsLineItems to PercentageOfPreviousPeriodDividendAsRestrictionOnCurrentPeriodDividends" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommonEquityRatioToBeMaintained" xlink:label="CommonEquityRatioToBeMaintained" xlink:title="CommonEquityRatioToBeMaintained" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="CommonEquityRatioToBeMaintained" xlink:title="definition: DividendPaymentRestrictionsLineItems to CommonEquityRatioToBeMaintained" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DividendPaymentRestrictionsPercentageOfCommonStockholdersEquityToTotalCapitalization" xlink:label="DividendPaymentRestrictionsPercentageOfCommonStockholdersEquityToTotalCapitalization" xlink:title="DividendPaymentRestrictionsPercentageOfCommonStockholdersEquityToTotalCapitalization" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="DividendPaymentRestrictionsPercentageOfCommonStockholdersEquityToTotalCapitalization" xlink:title="definition: DividendPaymentRestrictionsLineItems to DividendPaymentRestrictionsPercentageOfCommonStockholdersEquityToTotalCapitalization" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DividendPaymentRestrictionsDebtToCapitalizationRatio" xlink:label="DividendPaymentRestrictionsDebtToCapitalizationRatio" xlink:title="DividendPaymentRestrictionsDebtToCapitalizationRatio" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="DividendPaymentRestrictionsDebtToCapitalizationRatio" xlink:title="definition: DividendPaymentRestrictionsLineItems to DividendPaymentRestrictionsDebtToCapitalizationRatio" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" xlink:label="AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" xlink:title="AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" xlink:title="definition: DividendPaymentRestrictionsLineItems to AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsUndistributedEarningsFromEquityMethodInvestees" xlink:label="RetainedEarningsUndistributedEarningsFromEquityMethodInvestees" xlink:title="RetainedEarningsUndistributedEarningsFromEquityMethodInvestees" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="RetainedEarningsUndistributedEarningsFromEquityMethodInvestees" xlink:title="definition: DividendPaymentRestrictionsLineItems to RetainedEarningsUndistributedEarningsFromEquityMethodInvestees" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="ProceedsFromContributionsFromAffiliates" xlink:title="ProceedsFromContributionsFromAffiliates" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="ProceedsFromContributionsFromAffiliates" xlink:title="definition: DividendPaymentRestrictionsLineItems to ProceedsFromContributionsFromAffiliates" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="PaymentsOfDistributionsToAffiliates" xlink:title="PaymentsOfDistributionsToAffiliates" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="PaymentsOfDistributionsToAffiliates" xlink:title="definition: DividendPaymentRestrictionsLineItems to PaymentsOfDistributionsToAffiliates" use="optional" order="9.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfCapitalDistribution" xlink:label="PaymentsOfCapitalDistribution" xlink:title="PaymentsOfCapitalDistribution" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DividendPaymentRestrictionsLineItems" xlink:to="PaymentsOfCapitalDistribution" xlink:title="definition: DividendPaymentRestrictionsLineItems to PaymentsOfCapitalDistribution" use="optional" order="10.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureShortTermDebtAndLinesOfCreditDetails2">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="RangeAxis" xlink:title="RangeAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="RangeMember" xlink:title="RangeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RangeAxis" xlink:to="RangeMember" xlink:title="definition: RangeAxis to RangeMember" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="MaximumMember" xlink:title="MaximumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MaximumMember" xlink:title="definition: RangeMember to MaximumMember" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="ShortTermDebtLineItems" xlink:title="ShortTermDebtLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="ScheduleOfShortTermDebtTable" xlink:title="ScheduleOfShortTermDebtTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShortTermDebtLineItems" xlink:to="ScheduleOfShortTermDebtTable" xlink:title="definition: ShortTermDebtLineItems to ScheduleOfShortTermDebtTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="ShortTermDebtTypeAxis" xlink:title="ShortTermDebtTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShortTermDebtTable" xlink:to="ShortTermDebtTypeAxis" xlink:title="definition: ScheduleOfShortTermDebtTable to ShortTermDebtTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="ShortTermDebtTypeDomain" xlink:title="ShortTermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ShortTermDebtTypeAxis" xlink:to="ShortTermDebtTypeDomain" xlink:title="definition: ShortTermDebtTypeAxis to ShortTermDebtTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="ShortTermDebtTypeDomain_2" xlink:title="ShortTermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ShortTermDebtTypeAxis" xlink:to="ShortTermDebtTypeDomain_2" xlink:title="definition: ShortTermDebtTypeAxis to ShortTermDebtTypeDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember" xlink:title="CommercialPaperMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="CommercialPaperMember" xlink:title="definition: ShortTermDebtTypeDomain to CommercialPaperMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RevolvingCreditFacilityMaturing23April2013Member" xlink:label="RevolvingCreditFacilityMaturing23April2013Member" xlink:title="RevolvingCreditFacilityMaturing23April2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="RevolvingCreditFacilityMaturing23April2013Member" xlink:title="definition: ShortTermDebtTypeDomain to RevolvingCreditFacilityMaturing23April2013Member" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RevolvingCreditFacilityMaturing12June2013Member" xlink:label="RevolvingCreditFacilityMaturing12June2013Member" xlink:title="RevolvingCreditFacilityMaturing12June2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="RevolvingCreditFacilityMaturing12June2013Member" xlink:title="definition: ShortTermDebtTypeDomain to RevolvingCreditFacilityMaturing12June2013Member" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RevolvingCreditFacilityMaturing17May2014Member" xlink:label="RevolvingCreditFacilityMaturing17May2014Member" xlink:title="RevolvingCreditFacilityMaturing17May2014Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="RevolvingCreditFacilityMaturing17May2014Member" xlink:title="definition: ShortTermDebtTypeDomain to RevolvingCreditFacilityMaturing17May2014Member" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableToBanksMember" xlink:label="NotesPayableToBanksMember" xlink:title="NotesPayableToBanksMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="NotesPayableToBanksMember" xlink:title="definition: ShortTermDebtTypeDomain to NotesPayableToBanksMember" use="optional" order="8000.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShortTermDebtTable" xlink:to="RangeAxis" xlink:title="definition: ScheduleOfShortTermDebtTable to RangeAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="LineOfCreditFacilityMaximumBorrowingCapacity" xlink:title="LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="LineOfCreditFacilityMaximumBorrowingCapacity" xlink:title="definition: ShortTermDebtLineItems to LineOfCreditFacilityMaximumBorrowingCapacity" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="LettersOfCreditOutstandingAmount" xlink:title="LettersOfCreditOutstandingAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="LettersOfCreditOutstandingAmount" xlink:title="definition: ShortTermDebtLineItems to LettersOfCreditOutstandingAmount" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="ShortTermBorrowings" xlink:title="ShortTermBorrowings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="ShortTermBorrowings" xlink:title="definition: ShortTermDebtLineItems to ShortTermBorrowings" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="LineOfCreditFacilityRemainingBorrowingCapacity" xlink:title="LineOfCreditFacilityRemainingBorrowingCapacity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="LineOfCreditFacilityRemainingBorrowingCapacity" xlink:title="definition: ShortTermDebtLineItems to LineOfCreditFacilityRemainingBorrowingCapacity" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RatioOfIndebtednessToNetCapitalInPercentage" xlink:label="RatioOfIndebtednessToNetCapitalInPercentage" xlink:title="RatioOfIndebtednessToNetCapitalInPercentage" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="RatioOfIndebtednessToNetCapitalInPercentage" xlink:title="definition: ShortTermDebtLineItems to RatioOfIndebtednessToNetCapitalInPercentage" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails2">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="RangeAxis" xlink:title="RangeAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="RangeMember" xlink:title="RangeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RangeAxis" xlink:to="RangeMember" xlink:title="definition: RangeAxis to RangeMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="MinimumMember" xlink:title="MinimumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MinimumMember" xlink:title="definition: RangeMember to MinimumMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="MaximumMember" xlink:title="MaximumMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="MaximumMember" xlink:title="definition: RangeMember to MaximumMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageMember" xlink:label="WeightedAverageMember" xlink:title="WeightedAverageMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RangeMember" xlink:to="WeightedAverageMember" xlink:title="definition: RangeMember to WeightedAverageMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:label="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:title="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:label="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:title="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:to="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems to FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="DerivativeInstrumentRiskAxis" xlink:title="DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:to="DerivativeInstrumentRiskAxis" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable to DerivativeInstrumentRiskAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractFinancialTransmissionRightsMember" xlink:label="CommodityContractFinancialTransmissionRightsMember" xlink:title="CommodityContractFinancialTransmissionRightsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractFinancialTransmissionRightsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractFinancialTransmissionRightsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CoalContractMember" xlink:label="CoalContractMember" xlink:title="CoalContractMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CoalContractMember" xlink:title="definition: DerivativeContractTypeDomain to CoalContractMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="ValuationTechniqueAxis" xlink:title="ValuationTechniqueAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:to="ValuationTechniqueAxis" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable to ValuationTechniqueAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="ValuationTechniqueDomain" xlink:title="ValuationTechniqueDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ValuationTechniqueAxis" xlink:to="ValuationTechniqueDomain" xlink:title="definition: ValuationTechniqueAxis to ValuationTechniqueDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="ValuationTechniqueDomain_2" xlink:title="ValuationTechniqueDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ValuationTechniqueAxis" xlink:to="ValuationTechniqueDomain_2" xlink:title="definition: ValuationTechniqueAxis to ValuationTechniqueDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketApproachValuationTechniqueMember" xlink:label="MarketApproachValuationTechniqueMember" xlink:title="MarketApproachValuationTechniqueMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ValuationTechniqueDomain" xlink:to="MarketApproachValuationTechniqueMember" xlink:title="definition: ValuationTechniqueDomain to MarketApproachValuationTechniqueMember" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:to="RangeAxis" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable to RangeAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="FairValueByFairValueHierarchyLevelAxis" xlink:title="FairValueByFairValueHierarchyLevelAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable" xlink:to="FairValueByFairValueHierarchyLevelAxis" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationTable to FairValueByFairValueHierarchyLevelAxis" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="FairValueByFairValueHierarchyLevelAxis" xlink:to="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="definition: FairValueByFairValueHierarchyLevelAxis to FairValueMeasurementsFairValueHierarchyDomain" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="FairValueInputsLevel3Member" xlink:title="FairValueInputsLevel3Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementsFairValueHierarchyDomain" xlink:to="FairValueInputsLevel3Member" xlink:title="definition: FairValueMeasurementsFairValueHierarchyDomain to FairValueInputsLevel3Member" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="AssetsFairValueDisclosure" xlink:title="AssetsFairValueDisclosure" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:to="AssetsFairValueDisclosure" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems to AssetsFairValueDisclosure" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="LiabilitiesFairValueDisclosure" xlink:title="LiabilitiesFairValueDisclosure" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:to="LiabilitiesFairValueDisclosure" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems to LiabilitiesFairValueDisclosure" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueInputsForwardMarketPrices" xlink:label="FairValueInputsForwardMarketPrices" xlink:title="FairValueInputsForwardMarketPrices" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems" xlink:to="FairValueInputsForwardMarketPrices" xlink:title="definition: FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems to FairValueInputsForwardMarketPrices" use="optional" order="4.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureRelatedPartyTransactionsDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" xlink:title="LegalEntityAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain" xlink:title="EntityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" xlink:title="definition: LegalEntityAxis to EntityDomain" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WisconsinPublicServiceLeasingMember" xlink:label="WisconsinPublicServiceLeasingMember" xlink:title="WisconsinPublicServiceLeasingMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="WisconsinPublicServiceLeasingMember" xlink:title="definition: EntityDomain to WisconsinPublicServiceLeasingMember" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="RelatedPartyTransactionLineItems" xlink:title="RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="RelatedPartyTransactionLineItems" xlink:to="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="definition: RelatedPartyTransactionLineItems to ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="LegalEntityAxis" xlink:title="definition: ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to LegalEntityAxis" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="definition: ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to RelatedPartyTransactionsByRelatedPartyAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="RelatedPartyDomain" xlink:title="RelatedPartyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="RelatedPartyDomain" xlink:title="definition: RelatedPartyTransactionsByRelatedPartyAxis to RelatedPartyDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="RelatedPartyDomain_2" xlink:title="RelatedPartyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="RelatedPartyDomain_2" xlink:title="definition: RelatedPartyTransactionsByRelatedPartyAxis to RelatedPartyDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="ParentCompanyMember" xlink:title="ParentCompanyMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyDomain" xlink:to="ParentCompanyMember" xlink:title="definition: RelatedPartyDomain to ParentCompanyMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_UpperPeninsulaPowerCompanyMember" xlink:label="UpperPeninsulaPowerCompanyMember" xlink:title="UpperPeninsulaPowerCompanyMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyDomain" xlink:to="UpperPeninsulaPowerCompanyMember" xlink:title="definition: RelatedPartyDomain to UpperPeninsulaPowerCompanyMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_IntegrysEnergyServicesMember" xlink:label="IntegrysEnergyServicesMember" xlink:title="IntegrysEnergyServicesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyDomain" xlink:to="IntegrysEnergyServicesMember" xlink:title="definition: RelatedPartyDomain to IntegrysEnergyServicesMember" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="definition: ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="EquityMethodInvesteeNameDomain" xlink:title="EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="EquityMethodInvesteeNameDomain" xlink:title="definition: ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to EquityMethodInvesteeNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="EquityMethodInvesteeNameDomain_2" xlink:title="EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="EquityMethodInvesteeNameDomain_2" xlink:title="definition: ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to EquityMethodInvesteeNameDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AmericanTransmissionCompanyLLCMember" xlink:label="AmericanTransmissionCompanyLLCMember" xlink:title="AmericanTransmissionCompanyLLCMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMethodInvesteeNameDomain" xlink:to="AmericanTransmissionCompanyLLCMember" xlink:title="definition: EquityMethodInvesteeNameDomain to AmericanTransmissionCompanyLLCMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WisconsinRiverPowerCompanyMember" xlink:label="WisconsinRiverPowerCompanyMember" xlink:title="WisconsinRiverPowerCompanyMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMethodInvesteeNameDomain" xlink:to="WisconsinRiverPowerCompanyMember" xlink:title="definition: EquityMethodInvesteeNameDomain to WisconsinRiverPowerCompanyMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WPSInvestmentsLLCMember" xlink:label="WPSInvestmentsLLCMember" xlink:title="WPSInvestmentsLLCMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMethodInvesteeNameDomain" xlink:to="WPSInvestmentsLLCMember" xlink:title="definition: EquityMethodInvesteeNameDomain to WPSInvestmentsLLCMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="StatementBusinessSegmentsAxis" xlink:title="StatementBusinessSegmentsAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="StatementBusinessSegmentsAxis" xlink:title="definition: ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to StatementBusinessSegmentsAxis" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="SegmentDomain" xlink:title="SegmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementBusinessSegmentsAxis" xlink:to="SegmentDomain" xlink:title="definition: StatementBusinessSegmentsAxis to SegmentDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ElectricUtilityMember" xlink:label="ElectricUtilityMember" xlink:title="ElectricUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="ElectricUtilityMember" xlink:title="definition: SegmentDomain to ElectricUtilityMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NaturalGasUtilityMember" xlink:label="NaturalGasUtilityMember" xlink:title="NaturalGasUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="NaturalGasUtilityMember" xlink:title="definition: SegmentDomain to NaturalGasUtilityMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="NotesPayableRelatedPartiesNoncurrent" xlink:title="NotesPayableRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="NotesPayableRelatedPartiesNoncurrent" xlink:title="definition: RelatedPartyTransactionLineItems to NotesPayableRelatedPartiesNoncurrent" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DueFromRelatedPartiesBenefits" xlink:label="DueFromRelatedPartiesBenefits" xlink:title="DueFromRelatedPartiesBenefits" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="DueFromRelatedPartiesBenefits" xlink:title="definition: RelatedPartyTransactionLineItems to DueFromRelatedPartiesBenefits" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="DueToRelatedPartiesCurrentAndNoncurrent" xlink:title="DueToRelatedPartiesCurrentAndNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="DueToRelatedPartiesCurrentAndNoncurrent" xlink:title="definition: RelatedPartyTransactionLineItems to DueToRelatedPartiesCurrentAndNoncurrent" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:label="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:title="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:title="definition: RelatedPartyTransactionLineItems to PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="RevenueFromRelatedParties" xlink:title="RevenueFromRelatedParties" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="RevenueFromRelatedParties" xlink:title="definition: RelatedPartyTransactionLineItems to RevenueFromRelatedParties" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty" xlink:label="RelatedPartyTransactionPurchasesFromRelatedParty" xlink:title="RelatedPartyTransactionPurchasesFromRelatedParty" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="RelatedPartyTransactionPurchasesFromRelatedParty" xlink:title="definition: RelatedPartyTransactionLineItems to RelatedPartyTransactionPurchasesFromRelatedParty" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseRelatedParty" xlink:label="InterestExpenseRelatedParty" xlink:title="InterestExpenseRelatedParty" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="InterestExpenseRelatedParty" xlink:title="definition: RelatedPartyTransactionLineItems to InterestExpenseRelatedParty" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:title="RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:title="definition: RelatedPartyTransactionLineItems to RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" use="optional" order="9.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty" xlink:label="RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty" xlink:title="RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty" xlink:title="definition: RelatedPartyTransactionLineItems to RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="IncomeLossFromEquityMethodInvestments" xlink:title="IncomeLossFromEquityMethodInvestments" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="IncomeLossFromEquityMethodInvestments" xlink:title="definition: RelatedPartyTransactionLineItems to IncomeLossFromEquityMethodInvestments" use="optional" order="11.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="EquityMethodInvestmentOwnershipPercentage" xlink:title="EquityMethodInvestmentOwnershipPercentage" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="EquityMethodInvestmentOwnershipPercentage" xlink:title="definition: RelatedPartyTransactionLineItems to EquityMethodInvestmentOwnershipPercentage" use="optional" order="12.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ProceedsFromRelatedPartySales" xlink:label="ProceedsFromRelatedPartySales" xlink:title="ProceedsFromRelatedPartySales" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RelatedPartyTransactionLineItems" xlink:to="ProceedsFromRelatedPartySales" xlink:title="definition: RelatedPartyTransactionLineItems to ProceedsFromRelatedPartySales" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureRegulatoryEnvironmentDetails">
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthorityAxis" xlink:label="RegulatoryAuthorityAxis" xlink:title="RegulatoryAuthorityAxis" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthorityDomain" xlink:label="RegulatoryAuthorityDomain" xlink:title="RegulatoryAuthorityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RegulatoryAuthorityAxis" xlink:to="RegulatoryAuthorityDomain" xlink:title="definition: RegulatoryAuthorityAxis to RegulatoryAuthorityDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthorityDomain" xlink:label="RegulatoryAuthorityDomain_2" xlink:title="RegulatoryAuthorityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RegulatoryAuthorityAxis" xlink:to="RegulatoryAuthorityDomain_2" xlink:title="definition: RegulatoryAuthorityAxis to RegulatoryAuthorityDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WisconsinMember" xlink:label="WisconsinMember" xlink:title="WisconsinMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryAuthorityDomain" xlink:to="WisconsinMember" xlink:title="definition: RegulatoryAuthorityDomain to WisconsinMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryEnvironmentLineItems" xlink:label="RegulatoryEnvironmentLineItems" xlink:title="RegulatoryEnvironmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:label="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:title="ScheduleOfPublicUtilitiesRegulatoryMattersTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:title="definition: RegulatoryEnvironmentLineItems to ScheduleOfPublicUtilitiesRegulatoryMattersTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:to="RegulatoryAuthorityAxis" xlink:title="definition: ScheduleOfPublicUtilitiesRegulatoryMattersTable to RegulatoryAuthorityAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_YearOfRateCasesAxis" xlink:label="YearOfRateCasesAxis" xlink:title="YearOfRateCasesAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:to="YearOfRateCasesAxis" xlink:title="definition: ScheduleOfPublicUtilitiesRegulatoryMattersTable to YearOfRateCasesAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_YearOfRateCasesDomain" xlink:label="YearOfRateCasesDomain" xlink:title="YearOfRateCasesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="YearOfRateCasesAxis" xlink:to="YearOfRateCasesDomain" xlink:title="definition: YearOfRateCasesAxis to YearOfRateCasesDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_YearOfRateCasesDomain" xlink:label="YearOfRateCasesDomain_2" xlink:title="YearOfRateCasesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="YearOfRateCasesAxis" xlink:to="YearOfRateCasesDomain_2" xlink:title="definition: YearOfRateCasesAxis to YearOfRateCasesDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_Rates2013Member" xlink:label="Rates2013Member" xlink:title="Rates2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="YearOfRateCasesDomain" xlink:to="Rates2013Member" xlink:title="definition: YearOfRateCasesDomain to Rates2013Member" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_Rates2012Member" xlink:label="Rates2012Member" xlink:title="Rates2012Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="YearOfRateCasesDomain" xlink:to="Rates2012Member" xlink:title="definition: YearOfRateCasesDomain to Rates2012Member" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_Rates2011Member" xlink:label="Rates2011Member" xlink:title="Rates2011Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="YearOfRateCasesDomain" xlink:to="Rates2011Member" xlink:title="definition: YearOfRateCasesDomain to Rates2011Member" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryReviewProceedingsAxis" xlink:label="RegulatoryReviewProceedingsAxis" xlink:title="RegulatoryReviewProceedingsAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:to="RegulatoryReviewProceedingsAxis" xlink:title="definition: ScheduleOfPublicUtilitiesRegulatoryMattersTable to RegulatoryReviewProceedingsAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryReviewProceedingsDomain" xlink:label="RegulatoryReviewProceedingsDomain" xlink:title="RegulatoryReviewProceedingsDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RegulatoryReviewProceedingsAxis" xlink:to="RegulatoryReviewProceedingsDomain" xlink:title="definition: RegulatoryReviewProceedingsAxis to RegulatoryReviewProceedingsDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryReviewProceedingsDomain" xlink:label="RegulatoryReviewProceedingsDomain_2" xlink:title="RegulatoryReviewProceedingsDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RegulatoryReviewProceedingsAxis" xlink:to="RegulatoryReviewProceedingsDomain_2" xlink:title="definition: RegulatoryReviewProceedingsAxis to RegulatoryReviewProceedingsDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RetailElectricRateRequestMember" xlink:label="RetailElectricRateRequestMember" xlink:title="RetailElectricRateRequestMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryReviewProceedingsDomain" xlink:to="RetailElectricRateRequestMember" xlink:title="definition: RegulatoryReviewProceedingsDomain to RetailElectricRateRequestMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RetailNaturalGasRateRequestMember" xlink:label="RetailNaturalGasRateRequestMember" xlink:title="RetailNaturalGasRateRequestMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryReviewProceedingsDomain" xlink:to="RetailNaturalGasRateRequestMember" xlink:title="definition: RegulatoryReviewProceedingsDomain to RetailNaturalGasRateRequestMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RateReviewStagesAxis" xlink:label="RateReviewStagesAxis" xlink:title="RateReviewStagesAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPublicUtilitiesRegulatoryMattersTable" xlink:to="RateReviewStagesAxis" xlink:title="definition: ScheduleOfPublicUtilitiesRegulatoryMattersTable to RateReviewStagesAxis" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RateReviewStagesDomain" xlink:label="RateReviewStagesDomain" xlink:title="RateReviewStagesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="RateReviewStagesAxis" xlink:to="RateReviewStagesDomain" xlink:title="definition: RateReviewStagesAxis to RateReviewStagesDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RateReviewStagesDomain" xlink:label="RateReviewStagesDomain_2" xlink:title="RateReviewStagesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RateReviewStagesAxis" xlink:to="RateReviewStagesDomain_2" xlink:title="definition: RateReviewStagesAxis to RateReviewStagesDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_OriginalRequestMember" xlink:label="OriginalRequestMember" xlink:title="OriginalRequestMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RateReviewStagesDomain" xlink:to="OriginalRequestMember" xlink:title="definition: RateReviewStagesDomain to OriginalRequestMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthoritiesRateOrderMember" xlink:label="RegulatoryAuthoritiesRateOrderMember" xlink:title="RegulatoryAuthoritiesRateOrderMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RateReviewStagesDomain" xlink:to="RegulatoryAuthoritiesRateOrderMember" xlink:title="definition: RateReviewStagesDomain to RegulatoryAuthoritiesRateOrderMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthoritiesApprovedAndUpdatedSettlementAgreementMember" xlink:label="RegulatoryAuthoritiesApprovedAndUpdatedSettlementAgreementMember" xlink:title="RegulatoryAuthoritiesApprovedAndUpdatedSettlementAgreementMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RateReviewStagesDomain" xlink:to="RegulatoryAuthoritiesApprovedAndUpdatedSettlementAgreementMember" xlink:title="definition: RateReviewStagesDomain to RegulatoryAuthoritiesApprovedAndUpdatedSettlementAgreementMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAuthoritiesInterimRateOrderMember" xlink:label="RegulatoryAuthoritiesInterimRateOrderMember" xlink:title="RegulatoryAuthoritiesInterimRateOrderMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RateReviewStagesDomain" xlink:to="RegulatoryAuthoritiesInterimRateOrderMember" xlink:title="definition: RateReviewStagesDomain to RegulatoryAuthoritiesInterimRateOrderMember" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RequestedRateIncreaseDecreaseInRevenue" xlink:label="RequestedRateIncreaseDecreaseInRevenue" xlink:title="RequestedRateIncreaseDecreaseInRevenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="RequestedRateIncreaseDecreaseInRevenue" xlink:title="definition: RegulatoryEnvironmentLineItems to RequestedRateIncreaseDecreaseInRevenue" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RequestedRateOfReturnOnCommonEquity" xlink:label="RequestedRateOfReturnOnCommonEquity" xlink:title="RequestedRateOfReturnOnCommonEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="RequestedRateOfReturnOnCommonEquity" xlink:title="definition: RegulatoryEnvironmentLineItems to RequestedRateOfReturnOnCommonEquity" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RequestedPercentOfCapitalStructureComposedOfEquity" xlink:label="RequestedPercentOfCapitalStructureComposedOfEquity" xlink:title="RequestedPercentOfCapitalStructureComposedOfEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="RequestedPercentOfCapitalStructureComposedOfEquity" xlink:title="definition: RegulatoryEnvironmentLineItems to RequestedPercentOfCapitalStructureComposedOfEquity" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedRateIncreaseDecreaseInRevenue" xlink:label="AuthorizedRateIncreaseDecreaseInRevenue" xlink:title="AuthorizedRateIncreaseDecreaseInRevenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedRateIncreaseDecreaseInRevenue" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedRateIncreaseDecreaseInRevenue" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EstimatedFuelRefund" xlink:label="EstimatedFuelRefund" xlink:title="EstimatedFuelRefund" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="EstimatedFuelRefund" xlink:title="definition: RegulatoryEnvironmentLineItems to EstimatedFuelRefund" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedRateOfReturnOnCommonEquity" xlink:label="AuthorizedRateOfReturnOnCommonEquity" xlink:title="AuthorizedRateOfReturnOnCommonEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedRateOfReturnOnCommonEquity" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedRateOfReturnOnCommonEquity" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedPercentOfCapitalStructureComposedOfEquity" xlink:label="AuthorizedPercentOfCapitalStructureComposedOfEquity" xlink:title="AuthorizedPercentOfCapitalStructureComposedOfEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedPercentOfCapitalStructureComposedOfEquity" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedPercentOfCapitalStructureComposedOfEquity" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedRateAnnualCapUnderDecouplingMechanism" xlink:label="AuthorizedRateAnnualCapUnderDecouplingMechanism" xlink:title="AuthorizedRateAnnualCapUnderDecouplingMechanism" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedRateAnnualCapUnderDecouplingMechanism" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedRateAnnualCapUnderDecouplingMechanism" use="optional" order="9.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedRecoveryOfIncomeTaxExpense" xlink:label="AuthorizedRecoveryOfIncomeTaxExpense" xlink:title="AuthorizedRecoveryOfIncomeTaxExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedRecoveryOfIncomeTaxExpense" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedRecoveryOfIncomeTaxExpense" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredCostsCurrent" xlink:label="DeferredCostsCurrent" xlink:title="DeferredCostsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="DeferredCostsCurrent" xlink:title="definition: RegulatoryEnvironmentLineItems to DeferredCostsCurrent" use="optional" order="11.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RecoveryOfPriorDeferrals" xlink:label="RecoveryOfPriorDeferrals" xlink:title="RecoveryOfPriorDeferrals" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="RecoveryOfPriorDeferrals" xlink:title="definition: RegulatoryEnvironmentLineItems to RecoveryOfPriorDeferrals" use="optional" order="12.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AuthorizedRateOfReturnOnCommonEquityInPreviousOrder" xlink:label="AuthorizedRateOfReturnOnCommonEquityInPreviousOrder" xlink:title="AuthorizedRateOfReturnOnCommonEquityInPreviousOrder" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="AuthorizedRateOfReturnOnCommonEquityInPreviousOrder" xlink:title="definition: RegulatoryEnvironmentLineItems to AuthorizedRateOfReturnOnCommonEquityInPreviousOrder" use="optional" order="13.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PercentageOfPriceVarianceFromCostOfFuelAndPurchasedPower" xlink:label="PercentageOfPriceVarianceFromCostOfFuelAndPurchasedPower" xlink:title="PercentageOfPriceVarianceFromCostOfFuelAndPurchasedPower" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="PercentageOfPriceVarianceFromCostOfFuelAndPurchasedPower" xlink:title="definition: RegulatoryEnvironmentLineItems to PercentageOfPriceVarianceFromCostOfFuelAndPurchasedPower" use="optional" order="14.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DeferredRegulatoryLiability" xlink:label="DeferredRegulatoryLiability" xlink:title="DeferredRegulatoryLiability" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatoryEnvironmentLineItems" xlink:to="DeferredRegulatoryLiability" xlink:title="definition: RegulatoryEnvironmentLineItems to DeferredRegulatoryLiability" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureShortTermDebtAndLinesOfCreditDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="ShortTermDebtLineItems" xlink:title="ShortTermDebtLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="ScheduleOfShortTermDebtTable" xlink:title="ScheduleOfShortTermDebtTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ShortTermDebtLineItems" xlink:to="ScheduleOfShortTermDebtTable" xlink:title="definition: ShortTermDebtLineItems to ScheduleOfShortTermDebtTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="ShortTermDebtTypeAxis" xlink:title="ShortTermDebtTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfShortTermDebtTable" xlink:to="ShortTermDebtTypeAxis" xlink:title="definition: ScheduleOfShortTermDebtTable to ShortTermDebtTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="ShortTermDebtTypeDomain" xlink:title="ShortTermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ShortTermDebtTypeAxis" xlink:to="ShortTermDebtTypeDomain" xlink:title="definition: ShortTermDebtTypeAxis to ShortTermDebtTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember" xlink:title="CommercialPaperMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="CommercialPaperMember" xlink:title="definition: ShortTermDebtTypeDomain to CommercialPaperMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableToBanksMember" xlink:label="NotesPayableToBanksMember" xlink:title="NotesPayableToBanksMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtTypeDomain" xlink:to="NotesPayableToBanksMember" xlink:title="definition: ShortTermDebtTypeDomain to NotesPayableToBanksMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="ShortTermBorrowings" xlink:title="ShortTermBorrowings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="ShortTermBorrowings" xlink:title="definition: ShortTermDebtLineItems to ShortTermBorrowings" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ShortTermDebtAverageDiscountRate" xlink:label="ShortTermDebtAverageDiscountRate" xlink:title="ShortTermDebtAverageDiscountRate" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="ShortTermDebtAverageDiscountRate" xlink:title="definition: ShortTermDebtLineItems to ShortTermDebtAverageDiscountRate" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShorttermDebtAverageOutstandingAmount" xlink:label="ShorttermDebtAverageOutstandingAmount" xlink:title="ShorttermDebtAverageOutstandingAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShortTermDebtLineItems" xlink:to="ShorttermDebtAverageOutstandingAmount" xlink:title="definition: ShortTermDebtLineItems to ShorttermDebtAverageOutstandingAmount" use="optional" order="4.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureRiskManagementActivitiesDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="DerivativeInstrumentRiskAxis" xlink:title="DerivativeInstrumentRiskAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain_2" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain_2" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractFinancialTransmissionRightsMember" xlink:label="CommodityContractFinancialTransmissionRightsMember" xlink:title="CommodityContractFinancialTransmissionRightsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractFinancialTransmissionRightsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractFinancialTransmissionRightsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CoalContractMember" xlink:label="CoalContractMember" xlink:title="CoalContractMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CoalContractMember" xlink:title="definition: DerivativeContractTypeDomain to CoalContractMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractNaturalGasMember" xlink:label="CommodityContractNaturalGasMember" xlink:title="CommodityContractNaturalGasMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractNaturalGasMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractNaturalGasMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractPetroleumProductsMember" xlink:label="CommodityContractPetroleumProductsMember" xlink:title="CommodityContractPetroleumProductsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractPetroleumProductsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractPetroleumProductsMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="DerivativesFairValueLineItems" xlink:title="DerivativesFairValueLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeTable" xlink:label="DerivativeTable" xlink:title="DerivativeTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="DerivativesFairValueLineItems" xlink:to="DerivativeTable" xlink:title="definition: DerivativesFairValueLineItems to DerivativeTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="HedgingDesignationAxis" xlink:title="HedgingDesignationAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DerivativeTable" xlink:to="HedgingDesignationAxis" xlink:title="definition: DerivativeTable to HedgingDesignationAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="HedgingDesignationDomain" xlink:title="HedgingDesignationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="HedgingDesignationAxis" xlink:to="HedgingDesignationDomain" xlink:title="definition: HedgingDesignationAxis to HedgingDesignationDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="HedgingDesignationDomain_2" xlink:title="HedgingDesignationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="HedgingDesignationAxis" xlink:to="HedgingDesignationDomain_2" xlink:title="definition: HedgingDesignationAxis to HedgingDesignationDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="NondesignatedMember" xlink:title="NondesignatedMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="HedgingDesignationDomain" xlink:to="NondesignatedMember" xlink:title="definition: HedgingDesignationDomain to NondesignatedMember" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DerivativeTable" xlink:to="DerivativeInstrumentRiskAxis" xlink:title="definition: DerivativeTable to DerivativeInstrumentRiskAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedges" xlink:label="DerivativeInstrumentsAndHedges" xlink:title="DerivativeInstrumentsAndHedges" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativesFairValueLineItems" xlink:to="DerivativeInstrumentsAndHedges" xlink:title="definition: DerivativesFairValueLineItems to DerivativeInstrumentsAndHedges" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgesNoncurrent" xlink:label="DerivativeInstrumentsAndHedgesNoncurrent" xlink:title="DerivativeInstrumentsAndHedgesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativesFairValueLineItems" xlink:to="DerivativeInstrumentsAndHedgesNoncurrent" xlink:title="definition: DerivativesFairValueLineItems to DerivativeInstrumentsAndHedgesNoncurrent" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeInstrumentsAndHedgesLiabilitiesGrossCurrent" xlink:label="DerivativeInstrumentsAndHedgesLiabilitiesGrossCurrent" xlink:title="DerivativeInstrumentsAndHedgesLiabilitiesGrossCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativesFairValueLineItems" xlink:to="DerivativeInstrumentsAndHedgesLiabilitiesGrossCurrent" xlink:title="definition: DerivativesFairValueLineItems to DerivativeInstrumentsAndHedgesLiabilitiesGrossCurrent" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeInstrumentsAndHedgesLiabilitiesGrossNoncurrent" xlink:label="DerivativeInstrumentsAndHedgesLiabilitiesGrossNoncurrent" xlink:title="DerivativeInstrumentsAndHedgesLiabilitiesGrossNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativesFairValueLineItems" xlink:to="DerivativeInstrumentsAndHedgesLiabilitiesGrossNoncurrent" xlink:title="definition: DerivativesFairValueLineItems to DerivativeInstrumentsAndHedgesLiabilitiesGrossNoncurrent" use="optional" order="5.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureRiskManagementActivitiesDetails2">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="DerivativeInstrumentRiskAxis" xlink:title="DerivativeInstrumentRiskAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractFinancialTransmissionRightsMember" xlink:label="CommodityContractFinancialTransmissionRightsMember" xlink:title="CommodityContractFinancialTransmissionRightsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractFinancialTransmissionRightsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractFinancialTransmissionRightsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CoalContractMember" xlink:label="CoalContractMember" xlink:title="CoalContractMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CoalContractMember" xlink:title="definition: DerivativeContractTypeDomain to CoalContractMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractNaturalGasMember" xlink:label="CommodityContractNaturalGasMember" xlink:title="CommodityContractNaturalGasMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractNaturalGasMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractNaturalGasMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractPetroleumProductsMember" xlink:label="CommodityContractPetroleumProductsMember" xlink:title="CommodityContractPetroleumProductsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractPetroleumProductsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractPetroleumProductsMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeTable" xlink:label="DerivativeTable" xlink:title="DerivativeTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DerivativeTable" xlink:to="DerivativeInstrumentRiskAxis" xlink:title="definition: DerivativeTable to DerivativeInstrumentRiskAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" xlink:label="DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" xlink:title="DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DerivativeTable" xlink:to="DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" xlink:title="definition: DerivativeTable to DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FinancialStatementLocationDomain" xlink:label="FinancialStatementLocationDomain" xlink:title="FinancialStatementLocationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" xlink:to="FinancialStatementLocationDomain" xlink:title="definition: DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis to FinancialStatementLocationDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FinancialStatementLocationDomain" xlink:label="FinancialStatementLocationDomain_2" xlink:title="FinancialStatementLocationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis" xlink:to="FinancialStatementLocationDomain_2" xlink:title="definition: DerivativesNotDesignatedAsHedgesFinancialStatementLocationAxis to FinancialStatementLocationDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAssetsCurrentMember" xlink:label="RegulatoryAssetsCurrentMember" xlink:title="RegulatoryAssetsCurrentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="RegulatoryAssetsCurrentMember" xlink:title="definition: FinancialStatementLocationDomain to RegulatoryAssetsCurrentMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAssetsNoncurrentMember" xlink:label="RegulatoryAssetsNoncurrentMember" xlink:title="RegulatoryAssetsNoncurrentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="RegulatoryAssetsNoncurrentMember" xlink:title="definition: FinancialStatementLocationDomain to RegulatoryAssetsNoncurrentMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryLiabilityCurrentMember" xlink:label="RegulatoryLiabilityCurrentMember" xlink:title="RegulatoryLiabilityCurrentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="RegulatoryLiabilityCurrentMember" xlink:title="definition: FinancialStatementLocationDomain to RegulatoryLiabilityCurrentMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryLiabilitiesNoncurrentMember" xlink:label="RegulatoryLiabilitiesNoncurrentMember" xlink:title="RegulatoryLiabilitiesNoncurrentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="RegulatoryLiabilitiesNoncurrentMember" xlink:title="definition: FinancialStatementLocationDomain to RegulatoryLiabilitiesNoncurrentMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CostOfFuelNaturalGasAndPurchasedPowerMember" xlink:label="CostOfFuelNaturalGasAndPurchasedPowerMember" xlink:title="CostOfFuelNaturalGasAndPurchasedPowerMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="CostOfFuelNaturalGasAndPurchasedPowerMember" xlink:title="definition: FinancialStatementLocationDomain to CostOfFuelNaturalGasAndPurchasedPowerMember" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingExpenseMember" xlink:label="OperatingExpenseMember" xlink:title="OperatingExpenseMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FinancialStatementLocationDomain" xlink:to="OperatingExpenseMember" xlink:title="definition: FinancialStatementLocationDomain to OperatingExpenseMember" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeActivityAxis" xlink:label="DerivativeActivityAxis" xlink:title="DerivativeActivityAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DerivativeTable" xlink:to="DerivativeActivityAxis" xlink:title="definition: DerivativeTable to DerivativeActivityAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeActivityDomain" xlink:label="DerivativeActivityDomain" xlink:title="DerivativeActivityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeActivityAxis" xlink:to="DerivativeActivityDomain" xlink:title="definition: DerivativeActivityAxis to DerivativeActivityDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeActivityDomain" xlink:label="DerivativeActivityDomain_2" xlink:title="DerivativeActivityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DerivativeActivityAxis" xlink:to="DerivativeActivityDomain_2" xlink:title="definition: DerivativeActivityAxis to DerivativeActivityDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativePurchasesMember" xlink:label="DerivativePurchasesMember" xlink:title="DerivativePurchasesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeActivityDomain" xlink:to="DerivativePurchasesMember" xlink:title="definition: DerivativeActivityDomain to DerivativePurchasesMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DerivativeOtherTransactionsMember" xlink:label="DerivativeOtherTransactionsMember" xlink:title="DerivativeOtherTransactionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeActivityDomain" xlink:to="DerivativeOtherTransactionsMember" xlink:title="definition: DerivativeActivityDomain to DerivativeOtherTransactionsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="DerivativeLineItems" xlink:title="DerivativeLineItems" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="DerivativeLineItems" xlink:to="DerivativeTable" xlink:title="definition: DerivativeLineItems to DerivativeTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:label="DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:title="DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeLineItems" xlink:to="DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:title="definition: DerivativeLineItems to DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonmonetaryNotionalAmountOfPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments" xlink:label="NonmonetaryNotionalAmountOfPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments" xlink:title="NonmonetaryNotionalAmountOfPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeLineItems" xlink:to="NonmonetaryNotionalAmountOfPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments" xlink:title="definition: DerivativeLineItems to NonmonetaryNotionalAmountOfPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="DerivativeCollateralRightToReclaimCash" xlink:title="DerivativeCollateralRightToReclaimCash" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeLineItems" xlink:to="DerivativeCollateralRightToReclaimCash" xlink:title="definition: DerivativeLineItems to DerivativeCollateralRightToReclaimCash" use="optional" order="4.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="DerivativeInstrumentRiskAxis" xlink:title="DerivativeInstrumentRiskAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractFinancialTransmissionRightsMember" xlink:label="CommodityContractFinancialTransmissionRightsMember" xlink:title="CommodityContractFinancialTransmissionRightsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractFinancialTransmissionRightsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractFinancialTransmissionRightsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CoalContractMember" xlink:label="CoalContractMember" xlink:title="CoalContractMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CoalContractMember" xlink:title="definition: DerivativeContractTypeDomain to CoalContractMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractNaturalGasMember" xlink:label="CommodityContractNaturalGasMember" xlink:title="CommodityContractNaturalGasMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractNaturalGasMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractNaturalGasMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractPetroleumProductsMember" xlink:label="CommodityContractPetroleumProductsMember" xlink:title="CommodityContractPetroleumProductsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractPetroleumProductsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractPetroleumProductsMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="FairValueByFairValueHierarchyLevelAxis" xlink:title="FairValueByFairValueHierarchyLevelAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="FairValueByFairValueHierarchyLevelAxis" xlink:to="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="definition: FairValueByFairValueHierarchyLevelAxis to FairValueMeasurementsFairValueHierarchyDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="FairValueMeasurementsFairValueHierarchyDomain_2" xlink:title="FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="FairValueByFairValueHierarchyLevelAxis" xlink:to="FairValueMeasurementsFairValueHierarchyDomain_2" xlink:title="definition: FairValueByFairValueHierarchyLevelAxis to FairValueMeasurementsFairValueHierarchyDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="FairValueInputsLevel3Member" xlink:title="FairValueInputsLevel3Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementsFairValueHierarchyDomain" xlink:to="FairValueInputsLevel3Member" xlink:title="definition: FairValueMeasurementsFairValueHierarchyDomain to FairValueInputsLevel3Member" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="FairValueInputsLevel1Member" xlink:title="FairValueInputsLevel1Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementsFairValueHierarchyDomain" xlink:to="FairValueInputsLevel1Member" xlink:title="definition: FairValueMeasurementsFairValueHierarchyDomain to FairValueInputsLevel1Member" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="FairValueInputsLevel2Member" xlink:title="FairValueInputsLevel2Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementsFairValueHierarchyDomain" xlink:to="FairValueInputsLevel2Member" xlink:title="definition: FairValueMeasurementsFairValueHierarchyDomain to FairValueInputsLevel2Member" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="EstimateOfFairValueFairValueDisclosureMember" xlink:title="EstimateOfFairValueFairValueDisclosureMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementsFairValueHierarchyDomain" xlink:to="EstimateOfFairValueFairValueDisclosureMember" xlink:title="definition: FairValueMeasurementsFairValueHierarchyDomain to EstimateOfFairValueFairValueDisclosureMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems to FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="FairValueByMeasurementFrequencyAxis" xlink:title="FairValueByMeasurementFrequencyAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="FairValueByMeasurementFrequencyAxis" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable to FairValueByMeasurementFrequencyAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="FairValueMeasurementFrequencyDomain" xlink:title="FairValueMeasurementFrequencyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="FairValueByMeasurementFrequencyAxis" xlink:to="FairValueMeasurementFrequencyDomain" xlink:title="definition: FairValueByMeasurementFrequencyAxis to FairValueMeasurementFrequencyDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="FairValueMeasurementFrequencyDomain_2" xlink:title="FairValueMeasurementFrequencyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="FairValueByMeasurementFrequencyAxis" xlink:to="FairValueMeasurementFrequencyDomain_2" xlink:title="definition: FairValueByMeasurementFrequencyAxis to FairValueMeasurementFrequencyDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="FairValueMeasurementsRecurringMember" xlink:title="FairValueMeasurementsRecurringMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueMeasurementFrequencyDomain" xlink:to="FairValueMeasurementsRecurringMember" xlink:title="definition: FairValueMeasurementFrequencyDomain to FairValueMeasurementsRecurringMember" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="FairValueByFairValueHierarchyLevelAxis" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable to FairValueByFairValueHierarchyLevelAxis" use="optional" order="2.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="DerivativeInstrumentRiskAxis" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable to DerivativeInstrumentRiskAxis" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="AssetsAbstract" xlink:title="AssetsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="AssetsAbstract" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems to AssetsAbstract" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="DerivativeFairValueOfDerivativeAsset" xlink:title="DerivativeFairValueOfDerivativeAsset" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="DerivativeFairValueOfDerivativeAsset" xlink:title="definition: AssetsAbstract to DerivativeFairValueOfDerivativeAsset" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="LiabilitiesAbstract" xlink:title="LiabilitiesAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="LiabilitiesAbstract" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems to LiabilitiesAbstract" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="DerivativeFairValueOfDerivativeLiability" xlink:title="DerivativeFairValueOfDerivativeLiability" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAbstract" xlink:to="DerivativeFairValueOfDerivativeLiability" xlink:title="definition: LiabilitiesAbstract to DerivativeFairValueOfDerivativeLiability" use="optional" order="1.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails3">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="DerivativeInstrumentRiskAxis" xlink:title="DerivativeInstrumentRiskAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="DerivativeContractTypeDomain" xlink:title="DerivativeContractTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DerivativeInstrumentRiskAxis" xlink:to="DerivativeContractTypeDomain" xlink:title="definition: DerivativeInstrumentRiskAxis to DerivativeContractTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommodityContractFinancialTransmissionRightsMember" xlink:label="CommodityContractFinancialTransmissionRightsMember" xlink:title="CommodityContractFinancialTransmissionRightsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CommodityContractFinancialTransmissionRightsMember" xlink:title="definition: DerivativeContractTypeDomain to CommodityContractFinancialTransmissionRightsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CoalContractMember" xlink:label="CoalContractMember" xlink:title="CoalContractMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DerivativeContractTypeDomain" xlink:to="CoalContractMember" xlink:title="definition: DerivativeContractTypeDomain to CoalContractMember" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems to FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="DerivativeInstrumentRiskAxis" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable to DerivativeInstrumentRiskAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems to FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityValue" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityValue" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityValue" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityValue" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityGainLossIncludedInEarnings" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityGainLossIncludedInEarnings" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityGainLossIncludedInEarnings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityGainLossIncludedInEarnings" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityGainLossIncludedInEarnings" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityUnrealizedLossesRecordedAsRegulatoryAssetsOrLiabilities" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityUnrealizedLossesRecordedAsRegulatoryAssetsOrLiabilities" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityUnrealizedLossesRecordedAsRegulatoryAssetsOrLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityUnrealizedLossesRecordedAsRegulatoryAssetsOrLiabilities" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityUnrealizedLossesRecordedAsRegulatoryAssetsOrLiabilities" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySales" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySales" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySales" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySales" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySales" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements" xlink:title="definition: FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward to FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements" use="optional" order="6.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureCommitmentsAndContingenciesDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="StatementBusinessSegmentsAxis" xlink:title="StatementBusinessSegmentsAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="SegmentDomain" xlink:title="SegmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementBusinessSegmentsAxis" xlink:to="SegmentDomain" xlink:title="definition: StatementBusinessSegmentsAxis to SegmentDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ElectricUtilityMember" xlink:label="ElectricUtilityMember" xlink:title="ElectricUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="ElectricUtilityMember" xlink:title="definition: SegmentDomain to ElectricUtilityMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NaturalGasUtilityMember" xlink:label="NaturalGasUtilityMember" xlink:title="NaturalGasUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="NaturalGasUtilityMember" xlink:title="definition: SegmentDomain to NaturalGasUtilityMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PurchaseAndSupplyCommitmentLineItems" xlink:label="PurchaseAndSupplyCommitmentLineItems" xlink:title="PurchaseAndSupplyCommitmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ScheduleOfPurchaseSupplyCommitmentTable" xlink:label="ScheduleOfPurchaseSupplyCommitmentTable" xlink:title="ScheduleOfPurchaseSupplyCommitmentTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="PurchaseAndSupplyCommitmentLineItems" xlink:to="ScheduleOfPurchaseSupplyCommitmentTable" xlink:title="definition: PurchaseAndSupplyCommitmentLineItems to ScheduleOfPurchaseSupplyCommitmentTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ScheduleOfPurchaseSupplyCommitmentAxis" xlink:label="ScheduleOfPurchaseSupplyCommitmentAxis" xlink:title="ScheduleOfPurchaseSupplyCommitmentAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPurchaseSupplyCommitmentTable" xlink:to="ScheduleOfPurchaseSupplyCommitmentAxis" xlink:title="definition: ScheduleOfPurchaseSupplyCommitmentTable to ScheduleOfPurchaseSupplyCommitmentAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PurchaseSupplyCommitmentDomain" xlink:label="PurchaseSupplyCommitmentDomain" xlink:title="PurchaseSupplyCommitmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ScheduleOfPurchaseSupplyCommitmentAxis" xlink:to="PurchaseSupplyCommitmentDomain" xlink:title="definition: ScheduleOfPurchaseSupplyCommitmentAxis to PurchaseSupplyCommitmentDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PurchaseSupplyCommitmentDomain" xlink:label="PurchaseSupplyCommitmentDomain_2" xlink:title="PurchaseSupplyCommitmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ScheduleOfPurchaseSupplyCommitmentAxis" xlink:to="PurchaseSupplyCommitmentDomain_2" xlink:title="definition: ScheduleOfPurchaseSupplyCommitmentAxis to PurchaseSupplyCommitmentDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PurchasedPowerMember" xlink:label="PurchasedPowerMember" xlink:title="PurchasedPowerMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseSupplyCommitmentDomain" xlink:to="PurchasedPowerMember" xlink:title="definition: PurchaseSupplyCommitmentDomain to PurchasedPowerMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CoalSupplyAndTransportationMember" xlink:label="CoalSupplyAndTransportationMember" xlink:title="CoalSupplyAndTransportationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseSupplyCommitmentDomain" xlink:to="CoalSupplyAndTransportationMember" xlink:title="definition: PurchaseSupplyCommitmentDomain to CoalSupplyAndTransportationMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_OtherCommoditiesMember" xlink:label="OtherCommoditiesMember" xlink:title="OtherCommoditiesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseSupplyCommitmentDomain" xlink:to="OtherCommoditiesMember" xlink:title="definition: PurchaseSupplyCommitmentDomain to OtherCommoditiesMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NaturalGasSupplyAndTransportationMember" xlink:label="NaturalGasSupplyAndTransportationMember" xlink:title="NaturalGasSupplyAndTransportationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseSupplyCommitmentDomain" xlink:to="NaturalGasSupplyAndTransportationMember" xlink:title="definition: PurchaseSupplyCommitmentDomain to NaturalGasSupplyAndTransportationMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PurchaseOrderMember" xlink:label="PurchaseOrderMember" xlink:title="PurchaseOrderMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseSupplyCommitmentDomain" xlink:to="PurchaseOrderMember" xlink:title="definition: PurchaseSupplyCommitmentDomain to PurchaseOrderMember" use="optional" order="5.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfPurchaseSupplyCommitmentTable" xlink:to="StatementBusinessSegmentsAxis" xlink:title="definition: ScheduleOfPurchaseSupplyCommitmentTable to StatementBusinessSegmentsAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" xlink:label="UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" xlink:title="UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PurchaseAndSupplyCommitmentLineItems" xlink:to="UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" xlink:title="definition: PurchaseAndSupplyCommitmentLineItems to UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:label="UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:title="UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" xlink:to="UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:title="definition: UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract to UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermSupplyContractsObligationAmount" xlink:label="LongTermSupplyContractsObligationAmount" xlink:title="LongTermSupplyContractsObligationAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract" xlink:to="LongTermSupplyContractsObligationAmount" xlink:title="definition: UnconditionalPurchaseObligationsExcludingCapitalStockRedemptionsAbstract to LongTermSupplyContractsObligationAmount" use="optional" order="2.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureSegmentsOfBusinessDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="StatementBusinessSegmentsAxis" xlink:title="StatementBusinessSegmentsAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="SegmentDomain" xlink:title="SegmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementBusinessSegmentsAxis" xlink:to="SegmentDomain" xlink:title="definition: StatementBusinessSegmentsAxis to SegmentDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="SegmentDomain_2" xlink:title="SegmentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementBusinessSegmentsAxis" xlink:to="SegmentDomain_2" xlink:title="definition: StatementBusinessSegmentsAxis to SegmentDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ElectricUtilityMember" xlink:label="ElectricUtilityMember" xlink:title="ElectricUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="ElectricUtilityMember" xlink:title="definition: SegmentDomain to ElectricUtilityMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NaturalGasUtilityMember" xlink:label="NaturalGasUtilityMember" xlink:title="NaturalGasUtilityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="NaturalGasUtilityMember" xlink:title="definition: SegmentDomain to NaturalGasUtilityMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="AllOtherSegmentsMember" xlink:title="AllOtherSegmentsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="AllOtherSegmentsMember" xlink:title="definition: SegmentDomain to AllOtherSegmentsMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="IntersegmentEliminationMember" xlink:title="IntersegmentEliminationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentDomain" xlink:to="IntersegmentEliminationMember" xlink:title="definition: SegmentDomain to IntersegmentEliminationMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="SegmentReportingInformationLineItems" xlink:title="SegmentReportingInformationLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="ScheduleOfSegmentReportingInformationBySegmentTable" xlink:title="ScheduleOfSegmentReportingInformationBySegmentTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="SegmentReportingInformationLineItems" xlink:to="ScheduleOfSegmentReportingInformationBySegmentTable" xlink:title="definition: SegmentReportingInformationLineItems to ScheduleOfSegmentReportingInformationBySegmentTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:label="PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:title="PublicUtilityRegulatedOrUnregulatedStatusAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:title="definition: ScheduleOfSegmentReportingInformationBySegmentTable to PublicUtilityRegulatedOrUnregulatedStatusAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperationDomain" xlink:label="RegulatedAndUnregulatedOperationDomain" xlink:title="RegulatedAndUnregulatedOperationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:to="RegulatedAndUnregulatedOperationDomain" xlink:title="definition: PublicUtilityRegulatedOrUnregulatedStatusAxis to RegulatedAndUnregulatedOperationDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperationDomain" xlink:label="RegulatedAndUnregulatedOperationDomain_2" xlink:title="RegulatedAndUnregulatedOperationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:to="RegulatedAndUnregulatedOperationDomain_2" xlink:title="definition: PublicUtilityRegulatedOrUnregulatedStatusAxis to RegulatedAndUnregulatedOperationDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatedOperationMember" xlink:label="RegulatedOperationMember" xlink:title="RegulatedOperationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RegulatedAndUnregulatedOperationDomain" xlink:to="RegulatedOperationMember" xlink:title="definition: RegulatedAndUnregulatedOperationDomain to RegulatedOperationMember" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="StatementBusinessSegmentsAxis" xlink:title="definition: ScheduleOfSegmentReportingInformationBySegmentTable to StatementBusinessSegmentsAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="Revenues" xlink:title="Revenues" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="Revenues" xlink:title="definition: SegmentReportingInformationLineItems to Revenues" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:label="RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:title="RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:title="definition: SegmentReportingInformationLineItems to RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="DepreciationDepletionAndAmortization" xlink:title="DepreciationDepletionAndAmortization" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="DepreciationDepletionAndAmortization" xlink:title="definition: SegmentReportingInformationLineItems to DepreciationDepletionAndAmortization" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="OtherNonoperatingIncomeExpense" xlink:title="OtherNonoperatingIncomeExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="OtherNonoperatingIncomeExpense" xlink:title="definition: SegmentReportingInformationLineItems to OtherNonoperatingIncomeExpense" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="InterestExpense" xlink:title="InterestExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="InterestExpense" xlink:title="definition: SegmentReportingInformationLineItems to InterestExpense" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="IncomeTaxExpenseBenefit" xlink:title="IncomeTaxExpenseBenefit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="IncomeTaxExpenseBenefit" xlink:title="definition: SegmentReportingInformationLineItems to IncomeTaxExpenseBenefit" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="DividendsPreferredStockCash" xlink:title="DividendsPreferredStockCash" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="DividendsPreferredStockCash" xlink:title="definition: SegmentReportingInformationLineItems to DividendsPreferredStockCash" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="NetIncomeLossAvailableToCommonStockholdersBasic" xlink:title="NetIncomeLossAvailableToCommonStockholdersBasic" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="SegmentReportingInformationLineItems" xlink:to="NetIncomeLossAvailableToCommonStockholdersBasic" xlink:title="definition: SegmentReportingInformationLineItems to NetIncomeLossAvailableToCommonStockholdersBasic" use="optional" order="9.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureCommitmentsAndContingenciesDetails2">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="LossContingenciesLineItems" xlink:title="LossContingenciesLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="LossContingenciesTable" xlink:title="LossContingenciesTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="LossContingenciesLineItems" xlink:to="LossContingenciesTable" xlink:title="definition: LossContingenciesLineItems to LossContingenciesTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="LossContingenciesByNatureOfContingencyAxis" xlink:title="LossContingenciesByNatureOfContingencyAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="LossContingenciesTable" xlink:to="LossContingenciesByNatureOfContingencyAxis" xlink:title="definition: LossContingenciesTable to LossContingenciesByNatureOfContingencyAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="LossContingencyNatureDomain" xlink:title="LossContingencyNatureDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="LossContingenciesByNatureOfContingencyAxis" xlink:to="LossContingencyNatureDomain" xlink:title="definition: LossContingenciesByNatureOfContingencyAxis to LossContingencyNatureDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="LossContingencyNatureDomain_2" xlink:title="LossContingencyNatureDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="LossContingenciesByNatureOfContingencyAxis" xlink:to="LossContingencyNatureDomain_2" xlink:title="definition: LossContingenciesByNatureOfContingencyAxis to LossContingencyNatureDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WestonAndPulliamPlantsMember" xlink:label="WestonAndPulliamPlantsMember" xlink:title="WestonAndPulliamPlantsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="WestonAndPulliamPlantsMember" xlink:title="definition: LossContingencyNatureDomain to WestonAndPulliamPlantsMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_WDNRIssuedNOVsMember" xlink:label="WDNRIssuedNOVsMember" xlink:title="WDNRIssuedNOVsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="WDNRIssuedNOVsMember" xlink:title="definition: LossContingencyNatureDomain to WDNRIssuedNOVsMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PulliamTitleVAirPermitMember" xlink:label="PulliamTitleVAirPermitMember" xlink:title="PulliamTitleVAirPermitMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="PulliamTitleVAirPermitMember" xlink:title="definition: LossContingencyNatureDomain to PulliamTitleVAirPermitMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ColumbiaTitleVAirPermitMember" xlink:label="ColumbiaTitleVAirPermitMember" xlink:title="ColumbiaTitleVAirPermitMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="ColumbiaTitleVAirPermitMember" xlink:title="definition: LossContingencyNatureDomain to ColumbiaTitleVAirPermitMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionMember" xlink:label="MercuryEmissionMember" xlink:title="MercuryEmissionMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="MercuryEmissionMember" xlink:title="definition: LossContingencyNatureDomain to MercuryEmissionMember" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_SulfurDioxideAndNitrogenOxideEmissionsMember" xlink:label="SulfurDioxideAndNitrogenOxideEmissionsMember" xlink:title="SulfurDioxideAndNitrogenOxideEmissionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="SulfurDioxideAndNitrogenOxideEmissionsMember" xlink:title="definition: LossContingencyNatureDomain to SulfurDioxideAndNitrogenOxideEmissionsMember" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ManufacturedGasPlantRemediationMember" xlink:label="ManufacturedGasPlantRemediationMember" xlink:title="ManufacturedGasPlantRemediationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="ManufacturedGasPlantRemediationMember" xlink:title="definition: LossContingencyNatureDomain to ManufacturedGasPlantRemediationMember" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EPASettlementsWithOtherUtilitiesMember" xlink:label="EPASettlementsWithOtherUtilitiesMember" xlink:title="EPASettlementsWithOtherUtilitiesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyNatureDomain" xlink:to="EPASettlementsWithOtherUtilitiesMember" xlink:title="definition: LossContingencyNatureDomain to EPASettlementsWithOtherUtilitiesMember" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionReductionAxis" xlink:label="MercuryEmissionReductionAxis" xlink:title="MercuryEmissionReductionAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="LossContingenciesTable" xlink:to="MercuryEmissionReductionAxis" xlink:title="definition: LossContingenciesTable to MercuryEmissionReductionAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionReductionByPhaseDomain" xlink:label="MercuryEmissionReductionByPhaseDomain" xlink:title="MercuryEmissionReductionByPhaseDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="MercuryEmissionReductionAxis" xlink:to="MercuryEmissionReductionByPhaseDomain" xlink:title="definition: MercuryEmissionReductionAxis to MercuryEmissionReductionByPhaseDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionReductionByPhaseDomain" xlink:label="MercuryEmissionReductionByPhaseDomain_2" xlink:title="MercuryEmissionReductionByPhaseDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="MercuryEmissionReductionAxis" xlink:to="MercuryEmissionReductionByPhaseDomain_2" xlink:title="definition: MercuryEmissionReductionAxis to MercuryEmissionReductionByPhaseDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PhaseOneMember" xlink:label="PhaseOneMember" xlink:title="PhaseOneMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="MercuryEmissionReductionByPhaseDomain" xlink:to="PhaseOneMember" xlink:title="definition: MercuryEmissionReductionByPhaseDomain to PhaseOneMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PhaseTwoMember" xlink:label="PhaseTwoMember" xlink:title="PhaseTwoMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="MercuryEmissionReductionByPhaseDomain" xlink:to="PhaseTwoMember" xlink:title="definition: MercuryEmissionReductionByPhaseDomain to PhaseTwoMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyInformationAboutLitigationMattersAbstract" xlink:label="LossContingencyInformationAboutLitigationMattersAbstract" xlink:title="LossContingencyInformationAboutLitigationMattersAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingenciesLineItems" xlink:to="LossContingencyInformationAboutLitigationMattersAbstract" xlink:title="definition: LossContingenciesLineItems to LossContingencyInformationAboutLitigationMattersAbstract" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NumberOfNoticeOfViolationsOfAirPermits" xlink:label="NumberOfNoticeOfViolationsOfAirPermits" xlink:title="NumberOfNoticeOfViolationsOfAirPermits" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="NumberOfNoticeOfViolationsOfAirPermits" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to NumberOfNoticeOfViolationsOfAirPermits" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NumberOfNoticeOfViolationsForClericalError" xlink:label="NumberOfNoticeOfViolationsForClericalError" xlink:title="NumberOfNoticeOfViolationsForClericalError" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="NumberOfNoticeOfViolationsForClericalError" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to NumberOfNoticeOfViolationsForClericalError" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CorrectiveActionsTakenForNoticeOfViolationsIssued" xlink:label="CorrectiveActionsTakenForNoticeOfViolationsIssued" xlink:title="CorrectiveActionsTakenForNoticeOfViolationsIssued" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="CorrectiveActionsTakenForNoticeOfViolationsIssued" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to CorrectiveActionsTakenForNoticeOfViolationsIssued" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NoticeOfViolationsDismissed" xlink:label="NoticeOfViolationsDismissed" xlink:title="NoticeOfViolationsDismissed" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="NoticeOfViolationsDismissed" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to NoticeOfViolationsDismissed" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NoticeOfViolationsReferredToStateJusticeDepartment" xlink:label="NoticeOfViolationsReferredToStateJusticeDepartment" xlink:title="NoticeOfViolationsReferredToStateJusticeDepartment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="NoticeOfViolationsReferredToStateJusticeDepartment" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to NoticeOfViolationsReferredToStateJusticeDepartment" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EPAReviewPeriodInDays" xlink:label="EPAReviewPeriodInDays" xlink:title="EPAReviewPeriodInDays" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="EPAReviewPeriodInDays" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to EPAReviewPeriodInDays" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EPAOrderDirectedWDNRResolveObjectionsWithinPeriodInDays" xlink:label="EPAOrderDirectedWDNRResolveObjectionsWithinPeriodInDays" xlink:title="EPAOrderDirectedWDNRResolveObjectionsWithinPeriodInDays" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="EPAOrderDirectedWDNRResolveObjectionsWithinPeriodInDays" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to EPAOrderDirectedWDNRResolveObjectionsWithinPeriodInDays" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PeriodWithinWhichNoticeIsDueIfOperationPermitIsRequiredToBeSubmitted" xlink:label="PeriodWithinWhichNoticeIsDueIfOperationPermitIsRequiredToBeSubmitted" xlink:title="PeriodWithinWhichNoticeIsDueIfOperationPermitIsRequiredToBeSubmitted" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="PeriodWithinWhichNoticeIsDueIfOperationPermitIsRequiredToBeSubmitted" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to PeriodWithinWhichNoticeIsDueIfOperationPermitIsRequiredToBeSubmitted" use="optional" order="8.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MinimumNumberOfRemedialStepRequired" xlink:label="MinimumNumberOfRemedialStepRequired" xlink:title="MinimumNumberOfRemedialStepRequired" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="MinimumNumberOfRemedialStepRequired" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to MinimumNumberOfRemedialStepRequired" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyRangeOfPossibleLossMinimum" xlink:label="LossContingencyRangeOfPossibleLossMinimum" xlink:title="LossContingencyRangeOfPossibleLossMinimum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="LossContingencyRangeOfPossibleLossMinimum" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to LossContingencyRangeOfPossibleLossMinimum" use="optional" order="8001.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyRangeOfPossibleLossMaximum" xlink:label="LossContingencyRangeOfPossibleLossMaximum" xlink:title="LossContingencyRangeOfPossibleLossMaximum" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="LossContingencyRangeOfPossibleLossMaximum" xlink:title="definition: LossContingencyInformationAboutLitigationMattersAbstract to LossContingencyRangeOfPossibleLossMaximum" use="optional" order="8002.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EnvironmentalComplianceObligationsAbstract" xlink:label="EnvironmentalComplianceObligationsAbstract" xlink:title="EnvironmentalComplianceObligationsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingenciesLineItems" xlink:to="EnvironmentalComplianceObligationsAbstract" xlink:title="definition: LossContingenciesLineItems to EnvironmentalComplianceObligationsAbstract" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PercentageMercuryEmissionReduction" xlink:label="PercentageMercuryEmissionReduction" xlink:title="PercentageMercuryEmissionReduction" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="PercentageMercuryEmissionReduction" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to PercentageMercuryEmissionReduction" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:label="MercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:title="MercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="MercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to MercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PercentageMercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:label="PercentageMercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:title="PercentageMercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="PercentageMercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to PercentageMercuryEmissionReductionForElectricGeneratingUnitsAbove150MW" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_MercuryEmissionReductionForElectricGeneratingUnitsAbove25MW" xlink:label="MercuryEmissionReductionForElectricGeneratingUnitsAbove25MW" xlink:title="MercuryEmissionReductionForElectricGeneratingUnitsAbove25MW" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="MercuryEmissionReductionForElectricGeneratingUnitsAbove25MW" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to MercuryEmissionReductionForElectricGeneratingUnitsAbove25MW" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_EstimatedEnvironmentalCapitalCosts" xlink:label="EstimatedEnvironmentalCapitalCosts" xlink:title="EstimatedEnvironmentalCapitalCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="EstimatedEnvironmentalCapitalCosts" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to EstimatedEnvironmentalCapitalCosts" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NumberOfStatesIncludedInCAIRRegulations" xlink:label="NumberOfStatesIncludedInCAIRRegulations" xlink:title="NumberOfStatesIncludedInCAIRRegulations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalComplianceObligationsAbstract" xlink:to="NumberOfStatesIncludedInCAIRRegulations" xlink:title="definition: EnvironmentalComplianceObligationsAbstract to NumberOfStatesIncludedInCAIRRegulations" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EnvironmentalRemediationObligationsAbstract" xlink:label="EnvironmentalRemediationObligationsAbstract" xlink:title="EnvironmentalRemediationObligationsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LossContingenciesLineItems" xlink:to="EnvironmentalRemediationObligationsAbstract" xlink:title="definition: LossContingenciesLineItems to EnvironmentalRemediationObligationsAbstract" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NumberOfRemediationSites" xlink:label="NumberOfRemediationSites" xlink:title="NumberOfRemediationSites" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="NumberOfRemediationSites" xlink:title="definition: EnvironmentalRemediationObligationsAbstract to NumberOfRemediationSites" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NumberOfRemediationSitesTransferredToEPASuperfundAlternativeSitesProgram" xlink:label="NumberOfRemediationSitesTransferredToEPASuperfundAlternativeSitesProgram" xlink:title="NumberOfRemediationSitesTransferredToEPASuperfundAlternativeSitesProgram" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="NumberOfRemediationSitesTransferredToEPASuperfundAlternativeSitesProgram" xlink:title="definition: EnvironmentalRemediationObligationsAbstract to NumberOfRemediationSitesTransferredToEPASuperfundAlternativeSitesProgram" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingencies" xlink:label="AccrualForEnvironmentalLossContingencies" xlink:title="AccrualForEnvironmentalLossContingencies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="AccrualForEnvironmentalLossContingencies" xlink:title="definition: EnvironmentalRemediationObligationsAbstract to AccrualForEnvironmentalLossContingencies" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RegulatoryAssetRecoveryOfRemediationExpenditures" xlink:label="RegulatoryAssetRecoveryOfRemediationExpenditures" xlink:title="RegulatoryAssetRecoveryOfRemediationExpenditures" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="RegulatoryAssetRecoveryOfRemediationExpenditures" xlink:title="definition: EnvironmentalRemediationObligationsAbstract to RegulatoryAssetRecoveryOfRemediationExpenditures" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_InsuranceRecoveriesReceived" xlink:label="InsuranceRecoveriesReceived" xlink:title="InsuranceRecoveriesReceived" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="InsuranceRecoveriesReceived" xlink:title="definition: EnvironmentalRemediationObligationsAbstract to InsuranceRecoveriesReceived" use="optional" order="5.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureEmployeeBenefitPlansDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="DefinedBenefitPlanDisclosureLineItems" xlink:title="DefinedBenefitPlanDisclosureLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:title="ScheduleOfDefinedBenefitPlansDisclosuresTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to ScheduleOfDefinedBenefitPlansDisclosuresTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:title="DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:to="DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:title="definition: ScheduleOfDefinedBenefitPlansDisclosuresTable to DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="DefinedBenefitPlansDomain" xlink:title="DefinedBenefitPlansDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:to="DefinedBenefitPlansDomain" xlink:title="definition: DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis to DefinedBenefitPlansDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="DefinedBenefitPlansDomain_2" xlink:title="DefinedBenefitPlansDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:to="DefinedBenefitPlansDomain_2" xlink:title="definition: DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis to DefinedBenefitPlansDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="PensionPlansDefinedBenefitMember" xlink:title="PensionPlansDefinedBenefitMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlansDomain" xlink:to="PensionPlansDefinedBenefitMember" xlink:title="definition: DefinedBenefitPlansDomain to PensionPlansDefinedBenefitMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:title="OtherPostretirementBenefitPlansDefinedBenefitMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlansDomain" xlink:to="OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:title="definition: DefinedBenefitPlansDomain to OtherPostretirementBenefitPlansDefinedBenefitMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:title="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to DefinedBenefitPlanNetPeriodicBenefitCostAbstract" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="DefinedBenefitPlanServiceCost" xlink:title="DefinedBenefitPlanServiceCost" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanServiceCost" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanServiceCost" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="DefinedBenefitPlanInterestCost" xlink:title="DefinedBenefitPlanInterestCost" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanInterestCost" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanInterestCost" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:title="DefinedBenefitPlanExpectedReturnOnPlanAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanExpectedReturnOnPlanAssets" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:label="DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:title="DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:title="DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="DefinedBenefitPlanAmortizationOfGainsLosses" xlink:title="DefinedBenefitPlanAmortizationOfGainsLosses" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanAmortizationOfGainsLosses" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanAmortizationOfGainsLosses" use="optional" order="6.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="DefinedBenefitPlanNetPeriodicBenefitCost" xlink:title="DefinedBenefitPlanNetPeriodicBenefitCost" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanNetPeriodicBenefitCost" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanNetPeriodicBenefitCost" use="optional" order="7.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DefinedBenefitPlanRegulatoryDeferral" xlink:label="DefinedBenefitPlanRegulatoryDeferral" xlink:title="DefinedBenefitPlanRegulatoryDeferral" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="DefinedBenefitPlanRegulatoryDeferral" xlink:title="definition: DefinedBenefitPlanNetPeriodicBenefitCostAbstract to DefinedBenefitPlanRegulatoryDeferral" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="DefinedBenefitPlanContributionsByEmployer" xlink:title="DefinedBenefitPlanContributionsByEmployer" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="DefinedBenefitPlanContributionsByEmployer" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to DefinedBenefitPlanContributionsByEmployer" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear" xlink:label="DefinedBenefitPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear" xlink:title="DefinedBenefitPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="DefinedBenefitPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to DefinedBenefitPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DefinedBenefitUnfundedNonQualifiedPlanPensionObligationTransferredToRelatedParties" xlink:label="DefinedBenefitUnfundedNonQualifiedPlanPensionObligationTransferredToRelatedParties" xlink:title="DefinedBenefitUnfundedNonQualifiedPlanPensionObligationTransferredToRelatedParties" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="DefinedBenefitUnfundedNonQualifiedPlanPensionObligationTransferredToRelatedParties" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to DefinedBenefitUnfundedNonQualifiedPlanPensionObligationTransferredToRelatedParties" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_DefinedBenefitUnfundedNonQualifiedPlanReductionInPensionObligation" xlink:label="DefinedBenefitUnfundedNonQualifiedPlanReductionInPensionObligation" xlink:title="DefinedBenefitUnfundedNonQualifiedPlanReductionInPensionObligation" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DefinedBenefitPlanDisclosureLineItems" xlink:to="DefinedBenefitUnfundedNonQualifiedPlanReductionInPensionObligation" xlink:title="definition: DefinedBenefitPlanDisclosureLineItems to DefinedBenefitUnfundedNonQualifiedPlanReductionInPensionObligation" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureFairValueDetails4">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:title="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="FairValueByBalanceSheetGroupingTable" xlink:title="FairValueByBalanceSheetGroupingTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="FairValueByBalanceSheetGroupingTable" xlink:title="definition: FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to FairValueByBalanceSheetGroupingTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:title="FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="FairValueByBalanceSheetGroupingTable" xlink:to="FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:title="definition: FairValueByBalanceSheetGroupingTable to FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="FairValueDisclosureItemAmountsDomain" xlink:title="FairValueDisclosureItemAmountsDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:to="FairValueDisclosureItemAmountsDomain" xlink:title="definition: FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis to FairValueDisclosureItemAmountsDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="FairValueDisclosureItemAmountsDomain_2" xlink:title="FairValueDisclosureItemAmountsDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:to="FairValueDisclosureItemAmountsDomain_2" xlink:title="definition: FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis to FairValueDisclosureItemAmountsDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="CarryingReportedAmountFairValueDisclosureMember" xlink:title="CarryingReportedAmountFairValueDisclosureMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueDisclosureItemAmountsDomain" xlink:to="CarryingReportedAmountFairValueDisclosureMember" xlink:title="definition: FairValueDisclosureItemAmountsDomain to CarryingReportedAmountFairValueDisclosureMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="EstimateOfFairValueFairValueDisclosureMember" xlink:title="EstimateOfFairValueFairValueDisclosureMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueDisclosureItemAmountsDomain" xlink:to="EstimateOfFairValueFairValueDisclosureMember" xlink:title="definition: FairValueDisclosureItemAmountsDomain to EstimateOfFairValueFairValueDisclosureMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="LongTermDebtFairValue" xlink:title="LongTermDebtFairValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="LongTermDebtFairValue" xlink:title="definition: FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to LongTermDebtFairValue" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="NotesPayableRelatedPartiesNoncurrent" xlink:title="NotesPayableRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="NotesPayableRelatedPartiesNoncurrent" xlink:title="definition: FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to NotesPayableRelatedPartiesNoncurrent" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="PreferredStockValue" xlink:title="PreferredStockValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="PreferredStockValue" xlink:title="definition: FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to PreferredStockValue" use="optional" order="4.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureMiscellaneousIncomeDetails">
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ComponentOfOtherIncomeExpenseNonoperatingLineItems" xlink:label="ComponentOfOtherIncomeExpenseNonoperatingLineItems" xlink:title="ComponentOfOtherIncomeExpenseNonoperatingLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ComponentOfOtherIncomeExpenseNonoperatingTable" xlink:label="ComponentOfOtherIncomeExpenseNonoperatingTable" xlink:title="ComponentOfOtherIncomeExpenseNonoperatingTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingLineItems" xlink:to="ComponentOfOtherIncomeExpenseNonoperatingTable" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingLineItems to ComponentOfOtherIncomeExpenseNonoperatingTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ComponentOfOtherIncomeExpenseNonoperatingAxis" xlink:label="ComponentOfOtherIncomeExpenseNonoperatingAxis" xlink:title="ComponentOfOtherIncomeExpenseNonoperatingAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingTable" xlink:to="ComponentOfOtherIncomeExpenseNonoperatingAxis" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingTable to ComponentOfOtherIncomeExpenseNonoperatingAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:label="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:title="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingAxis" xlink:to="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingAxis to ComponentOfOtherIncomeExpenseNonoperatingNameDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:label="ComponentOfOtherIncomeExpenseNonoperatingNameDomain_2" xlink:title="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingAxis" xlink:to="ComponentOfOtherIncomeExpenseNonoperatingNameDomain_2" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingAxis to ComponentOfOtherIncomeExpenseNonoperatingNameDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsMember" xlink:label="IncomeLossFromEquityMethodInvestmentsMember" xlink:title="IncomeLossFromEquityMethodInvestmentsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:to="IncomeLossFromEquityMethodInvestmentsMember" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingNameDomain to IncomeLossFromEquityMethodInvestmentsMember" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_KeyExecutiveLifeInsuranceIncomeMember" xlink:label="KeyExecutiveLifeInsuranceIncomeMember" xlink:title="KeyExecutiveLifeInsuranceIncomeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:to="KeyExecutiveLifeInsuranceIncomeMember" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingNameDomain to KeyExecutiveLifeInsuranceIncomeMember" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_IncomeFromEquityPortionOfAFUDCMember" xlink:label="IncomeFromEquityPortionOfAFUDCMember" xlink:title="IncomeFromEquityPortionOfAFUDCMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:to="IncomeFromEquityPortionOfAFUDCMember" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingNameDomain to IncomeFromEquityPortionOfAFUDCMember" use="optional" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_OtherNonoperatingIncomeExpenseOtherMember" xlink:label="OtherNonoperatingIncomeExpenseOtherMember" xlink:title="OtherNonoperatingIncomeExpenseOtherMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingNameDomain" xlink:to="OtherNonoperatingIncomeExpenseOtherMember" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingNameDomain to OtherNonoperatingIncomeExpenseOtherMember" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="OtherNonoperatingIncomeExpense" xlink:title="OtherNonoperatingIncomeExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ComponentOfOtherIncomeExpenseNonoperatingLineItems" xlink:to="OtherNonoperatingIncomeExpense" xlink:title="definition: ComponentOfOtherIncomeExpenseNonoperatingLineItems to OtherNonoperatingIncomeExpense" use="optional" order="2.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureLongTermDebtDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="DebtInstrumentLineItems" xlink:title="DebtInstrumentLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="DebtInstrumentTable" xlink:title="DebtInstrumentTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="DebtInstrumentLineItems" xlink:to="DebtInstrumentTable" xlink:title="definition: DebtInstrumentLineItems to DebtInstrumentTable" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="LongtermDebtTypeAxis" xlink:title="LongtermDebtTypeAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="DebtInstrumentTable" xlink:to="LongtermDebtTypeAxis" xlink:title="definition: DebtInstrumentTable to LongtermDebtTypeAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="LongtermDebtTypeDomain" xlink:title="LongtermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="LongtermDebtTypeAxis" xlink:to="LongtermDebtTypeDomain" xlink:title="definition: LongtermDebtTypeAxis to LongtermDebtTypeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="LongtermDebtTypeDomain_2" xlink:title="LongtermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="LongtermDebtTypeAxis" xlink:to="LongtermDebtTypeDomain_2" xlink:title="definition: LongtermDebtTypeAxis to LongtermDebtTypeDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_SeniorNotes4.875PercentDueInDecember2012Member" xlink:label="SeniorNotes4.875PercentDueInDecember2012Member" xlink:title="SeniorNotes4.875PercentDueInDecember2012Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LongtermDebtTypeDomain" xlink:to="SeniorNotes4.875PercentDueInDecember2012Member" xlink:title="definition: LongtermDebtTypeDomain to SeniorNotes4.875PercentDueInDecember2012Member" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_SeniorNotes3.95PercentDueInFebruary2013Member" xlink:label="SeniorNotes3.95PercentDueInFebruary2013Member" xlink:title="SeniorNotes3.95PercentDueInFebruary2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LongtermDebtTypeDomain" xlink:to="SeniorNotes3.95PercentDueInFebruary2013Member" xlink:title="definition: LongtermDebtTypeDomain to SeniorNotes3.95PercentDueInFebruary2013Member" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="DebtInstrumentInterestRateStatedPercentage" xlink:title="DebtInstrumentInterestRateStatedPercentage" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentLineItems" xlink:to="DebtInstrumentInterestRateStatedPercentage" xlink:title="definition: DebtInstrumentLineItems to DebtInstrumentInterestRateStatedPercentage" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="DebtInstrumentCarryingAmount" xlink:title="DebtInstrumentCarryingAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentLineItems" xlink:to="DebtInstrumentCarryingAmount" xlink:title="definition: DebtInstrumentLineItems to DebtInstrumentCarryingAmount" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="DebtInstrumentFaceAmount" xlink:title="DebtInstrumentFaceAmount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentLineItems" xlink:to="DebtInstrumentFaceAmount" xlink:title="definition: DebtInstrumentLineItems to DebtInstrumentFaceAmount" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureAgreementToPurchaseFoxEnergyCenterDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="BusinessAcquisitionLineItems" xlink:title="BusinessAcquisitionLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:title="ScheduleOfBusinessAcquisitionsByAcquisitionTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="BusinessAcquisitionLineItems" xlink:to="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:title="definition: BusinessAcquisitionLineItems to ScheduleOfBusinessAcquisitionsByAcquisitionTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewContractAxis" xlink:label="NewContractAxis" xlink:title="NewContractAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="NewContractAxis" xlink:title="definition: ScheduleOfBusinessAcquisitionsByAcquisitionTable to NewContractAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewContractDomain" xlink:label="NewContractDomain" xlink:title="NewContractDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="NewContractAxis" xlink:to="NewContractDomain" xlink:title="definition: NewContractAxis to NewContractDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewContractDomain" xlink:label="NewContractDomain_2" xlink:title="NewContractDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="NewContractAxis" xlink:to="NewContractDomain_2" xlink:title="definition: NewContractAxis to NewContractDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PendingAcquisitionMember" xlink:label="PendingAcquisitionMember" xlink:title="PendingAcquisitionMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NewContractDomain" xlink:to="PendingAcquisitionMember" xlink:title="definition: NewContractDomain to PendingAcquisitionMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="BusinessAcquisitionAxis" xlink:title="BusinessAcquisitionAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="BusinessAcquisitionAxis" xlink:title="definition: ScheduleOfBusinessAcquisitionsByAcquisitionTable to BusinessAcquisitionAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="BusinessAcquisitionAcquireeDomain" xlink:title="BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="BusinessAcquisitionAxis" xlink:to="BusinessAcquisitionAcquireeDomain" xlink:title="definition: BusinessAcquisitionAxis to BusinessAcquisitionAcquireeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="BusinessAcquisitionAcquireeDomain_2" xlink:title="BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="BusinessAcquisitionAxis" xlink:to="BusinessAcquisitionAcquireeDomain_2" xlink:title="definition: BusinessAcquisitionAxis to BusinessAcquisitionAcquireeDomain" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FoxEnergyCompanyLLCMember" xlink:label="FoxEnergyCompanyLLCMember" xlink:title="FoxEnergyCompanyLLCMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionAcquireeDomain" xlink:to="FoxEnergyCompanyLLCMember" xlink:title="definition: BusinessAcquisitionAcquireeDomain to FoxEnergyCompanyLLCMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CapacityOfElectricGeneratingFacility" xlink:label="CapacityOfElectricGeneratingFacility" xlink:title="CapacityOfElectricGeneratingFacility" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="CapacityOfElectricGeneratingFacility" xlink:title="definition: BusinessAcquisitionLineItems to CapacityOfElectricGeneratingFacility" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:label="BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:title="BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:title="definition: BusinessAcquisitionLineItems to BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" use="optional" order="4.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ContractTerminationCosts" xlink:label="ContractTerminationCosts" xlink:title="ContractTerminationCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="ContractTerminationCosts" xlink:title="definition: BusinessAcquisitionLineItems to ContractTerminationCosts" use="optional" order="5.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:label="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:title="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:title="definition: BusinessAcquisitionLineItems to ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" order="3.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureVariableInterestEntitiesDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="BusinessAcquisitionLineItems" xlink:title="BusinessAcquisitionLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:title="ScheduleOfBusinessAcquisitionsByAcquisitionTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="BusinessAcquisitionLineItems" xlink:to="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:title="definition: BusinessAcquisitionLineItems to ScheduleOfBusinessAcquisitionsByAcquisitionTable" use="optional" order="1.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewContractAxis" xlink:label="NewContractAxis" xlink:title="NewContractAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="NewContractAxis" xlink:title="definition: ScheduleOfBusinessAcquisitionsByAcquisitionTable to NewContractAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewContractDomain" xlink:label="NewContractDomain" xlink:title="NewContractDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="NewContractAxis" xlink:to="NewContractDomain" xlink:title="definition: NewContractAxis to NewContractDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PendingAcquisitionMember" xlink:label="PendingAcquisitionMember" xlink:title="PendingAcquisitionMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NewContractDomain" xlink:to="PendingAcquisitionMember" xlink:title="definition: NewContractDomain to PendingAcquisitionMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="BusinessAcquisitionAxis" xlink:title="BusinessAcquisitionAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="BusinessAcquisitionAxis" xlink:title="definition: ScheduleOfBusinessAcquisitionsByAcquisitionTable to BusinessAcquisitionAxis" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="BusinessAcquisitionAcquireeDomain" xlink:title="BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="BusinessAcquisitionAxis" xlink:to="BusinessAcquisitionAcquireeDomain" xlink:title="definition: BusinessAcquisitionAxis to BusinessAcquisitionAcquireeDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FoxEnergyCompanyLLCMember" xlink:label="FoxEnergyCompanyLLCMember" xlink:title="FoxEnergyCompanyLLCMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionAcquireeDomain" xlink:to="FoxEnergyCompanyLLCMember" xlink:title="definition: BusinessAcquisitionAcquireeDomain to FoxEnergyCompanyLLCMember" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ContractTerminationCosts" xlink:label="ContractTerminationCosts" xlink:title="ContractTerminationCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="ContractTerminationCosts" xlink:title="definition: BusinessAcquisitionLineItems to ContractTerminationCosts" use="optional" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:label="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:title="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BusinessAcquisitionLineItems" xlink:to="ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" xlink:title="definition: BusinessAcquisitionLineItems to ContractedCapacityFromVariableInterestEntityPowerPurchaseAgreements" order="4.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/DisclosureFinancialInformationDetails">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:label="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:title="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" xlink:label="ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" xlink:title="ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:to="ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" xlink:title="definition: ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems to ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" order="1.0" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" xlink:label="QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" xlink:title="QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" xlink:to="QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" xlink:title="definition: ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable to QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NatureOfReclassificationDomain" xlink:label="NatureOfReclassificationDomain" xlink:title="NatureOfReclassificationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" xlink:to="NatureOfReclassificationDomain" xlink:title="definition: QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis to NatureOfReclassificationDomain" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NatureOfReclassificationDomain" xlink:label="NatureOfReclassificationDomain_2" xlink:title="NatureOfReclassificationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis" xlink:to="NatureOfReclassificationDomain_2" xlink:title="definition: QuantifyingReclassificationInCurrentYearFinancialStatementsByNatureOfReclassificationAxis to NatureOfReclassificationDomain" priority="1" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CashFlowReclassificationMember" xlink:label="CashFlowReclassificationMember" xlink:title="CashFlowReclassificationMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NatureOfReclassificationDomain" xlink:to="CashFlowReclassificationMember" xlink:title="definition: NatureOfReclassificationDomain to CashFlowReclassificationMember" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable" xlink:to="StatementScenarioAxis" xlink:title="definition: ScheduleOfQuantifyingPriorYearReclassificationAdjustedInCurrentYearFinancialStatementsTable to StatementScenarioAxis" order="3.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain_2" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain_2" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" priority="1" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestatementAdjustmentMember" xlink:label="RestatementAdjustmentMember" xlink:title="RestatementAdjustmentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScenarioUnspecifiedDomain" xlink:to="RestatementAdjustmentMember" xlink:title="definition: ScenarioUnspecifiedDomain to RestatementAdjustmentMember" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="IncreaseDecreaseInOtherOperatingAssets" xlink:title="IncreaseDecreaseInOtherOperatingAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:to="IncreaseDecreaseInOtherOperatingAssets" xlink:title="definition: ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems to IncreaseDecreaseInOtherOperatingAssets" order="2.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="IncreaseDecreaseInInventories" xlink:title="IncreaseDecreaseInInventories" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:to="IncreaseDecreaseInInventories" xlink:title="definition: ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems to IncreaseDecreaseInInventories" order="3.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/BalanceSheet">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="AssetsAbstract" xlink:title="AssetsAbstract" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="CashAndCashEquivalentsAtCarryingValue" xlink:title="CashAndCashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="CashAndCashEquivalentsAtCarryingValue" xlink:title="definition: AssetsAbstract to CashAndCashEquivalentsAtCarryingValue" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="ReceivablesNetCurrent" xlink:title="ReceivablesNetCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="ReceivablesNetCurrent" xlink:title="definition: AssetsAbstract to ReceivablesNetCurrent" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrent" xlink:label="DueFromRelatedPartiesCurrent" xlink:title="DueFromRelatedPartiesCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="DueFromRelatedPartiesCurrent" xlink:title="definition: AssetsAbstract to DueFromRelatedPartiesCurrent" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="InventoryNetAbstract" xlink:title="InventoryNetAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="InventoryNetAbstract" xlink:title="definition: AssetsAbstract to InventoryNetAbstract" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="InventoryRawMaterials" xlink:title="InventoryRawMaterials" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InventoryNetAbstract" xlink:to="InventoryRawMaterials" xlink:title="definition: InventoryNetAbstract to InventoryRawMaterials" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherInventorySupplies" xlink:label="OtherInventorySupplies" xlink:title="OtherInventorySupplies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InventoryNetAbstract" xlink:to="OtherInventorySupplies" xlink:title="definition: InventoryNetAbstract to OtherInventorySupplies" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="RegulatoryAssetsCurrent" xlink:title="RegulatoryAssetsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="RegulatoryAssetsCurrent" xlink:title="definition: AssetsAbstract to RegulatoryAssetsCurrent" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="PrepaidTaxes" xlink:title="PrepaidTaxes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="PrepaidTaxes" xlink:title="definition: AssetsAbstract to PrepaidTaxes" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="OtherAssetsCurrent" xlink:title="OtherAssetsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="OtherAssetsCurrent" xlink:title="definition: AssetsAbstract to OtherAssetsCurrent" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="AssetsCurrent" xlink:title="AssetsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="AssetsCurrent" xlink:title="definition: AssetsAbstract to AssetsCurrent" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="PropertyPlantAndEquipmentNet" xlink:title="PropertyPlantAndEquipmentNet" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="PropertyPlantAndEquipmentNet" xlink:title="definition: AssetsAbstract to PropertyPlantAndEquipmentNet" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="RegulatoryAssetsNoncurrent" xlink:title="RegulatoryAssetsNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="RegulatoryAssetsNoncurrent" xlink:title="definition: AssetsAbstract to RegulatoryAssetsNoncurrent" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DueFromRelatedPartiesNoncurrent" xlink:label="DueFromRelatedPartiesNoncurrent" xlink:title="DueFromRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="DueFromRelatedPartiesNoncurrent" xlink:title="definition: AssetsAbstract to DueFromRelatedPartiesNoncurrent" use="optional" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="Goodwill" xlink:title="Goodwill" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="Goodwill" xlink:title="definition: AssetsAbstract to Goodwill" use="optional" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="OtherAssetsNoncurrent" xlink:title="OtherAssetsNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="OtherAssetsNoncurrent" xlink:title="definition: AssetsAbstract to OtherAssetsNoncurrent" use="optional" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Assets" xlink:title="Assets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="Assets" xlink:title="definition: AssetsAbstract to Assets" use="optional" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="DeferredTaxAssetsNetCurrent" xlink:title="DeferredTaxAssetsNetCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="DeferredTaxAssetsNetCurrent" xlink:title="definition: AssetsAbstract to DeferredTaxAssetsNetCurrent" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PrepaidTaxesAndTaxesReceivableCurrent" xlink:label="PrepaidTaxesAndTaxesReceivableCurrent" xlink:title="PrepaidTaxesAndTaxesReceivableCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="PrepaidTaxesAndTaxesReceivableCurrent" xlink:title="definition: AssetsAbstract to PrepaidTaxesAndTaxesReceivableCurrent" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PrepaidGrossReceiptsTaxes" xlink:label="PrepaidGrossReceiptsTaxes" xlink:title="PrepaidGrossReceiptsTaxes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="PrepaidGrossReceiptsTaxes" xlink:title="definition: AssetsAbstract to PrepaidGrossReceiptsTaxes" use="optional" order="8020.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarginDepositAssets" xlink:label="MarginDepositAssets" xlink:title="MarginDepositAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="MarginDepositAssets" xlink:title="definition: AssetsAbstract to MarginDepositAssets" use="optional" order="8030.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="InventoryNet" xlink:title="InventoryNet" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AssetsAbstract" xlink:to="InventoryNet" xlink:title="definition: AssetsAbstract to InventoryNet" use="optional" order="8040.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="StatementLineItems" xlink:title="StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="StatementTable" xlink:title="StatementTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementLineItems" xlink:to="StatementTable" xlink:title="definition: StatementLineItems to StatementTable" order="10.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementTable" xlink:to="StatementScenarioAxis" xlink:title="definition: StatementTable to StatementScenarioAxis" use="optional" order="1.0" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="AssetsAbstract" xlink:title="definition: StatementLineItems to AssetsAbstract" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="LiabilitiesAndStockholdersEquityAbstract" xlink:title="LiabilitiesAndStockholdersEquityAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="LiabilitiesAndStockholdersEquityAbstract" xlink:title="definition: StatementLineItems to LiabilitiesAndStockholdersEquityAbstract" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="ShortTermBorrowings" xlink:title="ShortTermBorrowings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="ShortTermBorrowings" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to ShortTermBorrowings" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="LongTermDebtCurrent" xlink:title="LongTermDebtCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="LongTermDebtCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to LongTermDebtCurrent" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="AccountsPayableCurrent" xlink:title="AccountsPayableCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="AccountsPayableCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to AccountsPayableCurrent" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DueToRelatedPartiesCurrent" xlink:label="DueToRelatedPartiesCurrent" xlink:title="DueToRelatedPartiesCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="DueToRelatedPartiesCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to DueToRelatedPartiesCurrent" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="RegulatoryLiabilityCurrent" xlink:title="RegulatoryLiabilityCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="RegulatoryLiabilityCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to RegulatoryLiabilityCurrent" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="OtherLiabilitiesCurrent" xlink:title="OtherLiabilitiesCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="OtherLiabilitiesCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to OtherLiabilitiesCurrent" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="LiabilitiesCurrent" xlink:title="LiabilitiesCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="LiabilitiesCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to LiabilitiesCurrent" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="NotesPayableRelatedPartiesNoncurrent" xlink:title="NotesPayableRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="NotesPayableRelatedPartiesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to NotesPayableRelatedPartiesNoncurrent" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="LongTermDebtNoncurrent" xlink:title="LongTermDebtNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="LongTermDebtNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to LongTermDebtNoncurrent" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGrossNoncurrent" xlink:label="DeferredTaxLiabilitiesGrossNoncurrent" xlink:title="DeferredTaxLiabilitiesGrossNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="DeferredTaxLiabilitiesGrossNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to DeferredTaxLiabilitiesGrossNoncurrent" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedDeferredInvestmentTaxCredit" xlink:label="AccumulatedDeferredInvestmentTaxCredit" xlink:title="AccumulatedDeferredInvestmentTaxCredit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="AccumulatedDeferredInvestmentTaxCredit" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to AccumulatedDeferredInvestmentTaxCredit" use="optional" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="RegulatoryLiabilityNoncurrent" xlink:title="RegulatoryLiabilityNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="RegulatoryLiabilityNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to RegulatoryLiabilityNoncurrent" use="optional" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent" xlink:label="AccruedEnvironmentalLossContingenciesNoncurrent" xlink:title="AccruedEnvironmentalLossContingenciesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="AccruedEnvironmentalLossContingenciesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to AccruedEnvironmentalLossContingenciesNoncurrent" use="optional" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:title="PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" use="optional" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DueToRelatedPartiesNoncurrent" xlink:label="DueToRelatedPartiesNoncurrent" xlink:title="DueToRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="DueToRelatedPartiesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to DueToRelatedPartiesNoncurrent" use="optional" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="OtherLiabilitiesNoncurrent" xlink:title="OtherLiabilitiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="OtherLiabilitiesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to OtherLiabilitiesNoncurrent" use="optional" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="LiabilitiesNoncurrent" xlink:title="LiabilitiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="LiabilitiesNoncurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to LiabilitiesNoncurrent" use="optional" order="170.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="CommitmentsAndContingencies" xlink:title="CommitmentsAndContingencies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="CommitmentsAndContingencies" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to CommitmentsAndContingencies" use="optional" order="180.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="PreferredStockValue" xlink:title="PreferredStockValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="PreferredStockValue" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to PreferredStockValue" use="optional" order="190.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="CommonStockValue" xlink:title="CommonStockValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="CommonStockValue" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to CommonStockValue" use="optional" order="200.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="AdditionalPaidInCapitalCommonStock" xlink:title="AdditionalPaidInCapitalCommonStock" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="AdditionalPaidInCapitalCommonStock" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to AdditionalPaidInCapitalCommonStock" use="optional" order="210.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="RetainedEarningsAccumulatedDeficit" xlink:title="RetainedEarningsAccumulatedDeficit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="RetainedEarningsAccumulatedDeficit" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to RetainedEarningsAccumulatedDeficit" use="optional" order="220.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="LiabilitiesAndStockholdersEquity" xlink:title="LiabilitiesAndStockholdersEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="LiabilitiesAndStockholdersEquity" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to LiabilitiesAndStockholdersEquity" use="optional" order="230.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CustomerAdvancesCurrent" xlink:label="CustomerAdvancesCurrent" xlink:title="CustomerAdvancesCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="CustomerAdvancesCurrent" xlink:title="definition: LiabilitiesAndStockholdersEquityAbstract to CustomerAdvancesCurrent" use="optional" order="8000.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/StatementOfIncome">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="StatementLineItems" xlink:title="StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="StatementTable" xlink:title="StatementTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementLineItems" xlink:to="StatementTable" xlink:title="definition: StatementLineItems to StatementTable" order="10.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementTable" xlink:to="StatementScenarioAxis" xlink:title="definition: StatementTable to StatementScenarioAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="Revenues" xlink:title="Revenues" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="Revenues" xlink:title="definition: StatementLineItems to Revenues" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CostOfFuelNaturalGasAndPurchasedPower" xlink:label="CostOfFuelNaturalGasAndPurchasedPower" xlink:title="CostOfFuelNaturalGasAndPurchasedPower" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="CostOfFuelNaturalGasAndPurchasedPower" xlink:title="definition: StatementLineItems to CostOfFuelNaturalGasAndPurchasedPower" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="OtherCostAndExpenseOperating" xlink:title="OtherCostAndExpenseOperating" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="OtherCostAndExpenseOperating" xlink:title="definition: StatementLineItems to OtherCostAndExpenseOperating" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="DepreciationDepletionAndAmortization" xlink:title="DepreciationDepletionAndAmortization" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="DepreciationDepletionAndAmortization" xlink:title="definition: StatementLineItems to DepreciationDepletionAndAmortization" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="TaxesExcludingIncomeAndExciseTaxes" xlink:title="TaxesExcludingIncomeAndExciseTaxes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="TaxesExcludingIncomeAndExciseTaxes" xlink:title="definition: StatementLineItems to TaxesExcludingIncomeAndExciseTaxes" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="OperatingIncomeLoss" xlink:title="OperatingIncomeLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="OperatingIncomeLoss" xlink:title="definition: StatementLineItems to OperatingIncomeLoss" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="OtherNonoperatingIncomeExpense" xlink:title="OtherNonoperatingIncomeExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="OtherNonoperatingIncomeExpense" xlink:title="definition: StatementLineItems to OtherNonoperatingIncomeExpense" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="InterestExpense" xlink:title="InterestExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="InterestExpense" xlink:title="definition: StatementLineItems to InterestExpense" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="NonoperatingIncomeExpense" xlink:title="NonoperatingIncomeExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NonoperatingIncomeExpense" xlink:title="definition: StatementLineItems to NonoperatingIncomeExpense" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="definition: StatementLineItems to IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" use="optional" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="IncomeTaxExpenseBenefit" xlink:title="IncomeTaxExpenseBenefit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="IncomeTaxExpenseBenefit" xlink:title="definition: StatementLineItems to IncomeTaxExpenseBenefit" use="optional" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="NetIncomeLoss" xlink:title="NetIncomeLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetIncomeLoss" xlink:title="definition: StatementLineItems to NetIncomeLoss" use="optional" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="DividendsPreferredStockCash" xlink:title="DividendsPreferredStockCash" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="DividendsPreferredStockCash" xlink:title="definition: StatementLineItems to DividendsPreferredStockCash" use="optional" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="NetIncomeLossAvailableToCommonStockholdersBasic" xlink:title="NetIncomeLossAvailableToCommonStockholdersBasic" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetIncomeLossAvailableToCommonStockholdersBasic" xlink:title="definition: StatementLineItems to NetIncomeLossAvailableToCommonStockholdersBasic" use="optional" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ElectricProductionExpense" xlink:label="ElectricProductionExpense" xlink:title="ElectricProductionExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="ElectricProductionExpense" xlink:title="definition: StatementLineItems to ElectricProductionExpense" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfPurchasedPower" xlink:label="CostOfPurchasedPower" xlink:title="CostOfPurchasedPower" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="CostOfPurchasedPower" xlink:title="definition: StatementLineItems to CostOfPurchasedPower" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="RevenuesAbstract" xlink:title="RevenuesAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="RevenuesAbstract" xlink:title="definition: StatementLineItems to RevenuesAbstract" use="optional" order="8020.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ElectricDomesticRegulatedRevenue" xlink:label="ElectricDomesticRegulatedRevenue" xlink:title="ElectricDomesticRegulatedRevenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RevenuesAbstract" xlink:to="ElectricDomesticRegulatedRevenue" xlink:title="definition: RevenuesAbstract to ElectricDomesticRegulatedRevenue" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GasDomesticRegulatedRevenue" xlink:label="GasDomesticRegulatedRevenue" xlink:title="GasDomesticRegulatedRevenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="RevenuesAbstract" xlink:to="GasDomesticRegulatedRevenue" xlink:title="definition: RevenuesAbstract to GasDomesticRegulatedRevenue" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DirectOperatingCosts" xlink:label="DirectOperatingCosts" xlink:title="DirectOperatingCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="DirectOperatingCosts" xlink:title="definition: StatementLineItems to DirectOperatingCosts" use="optional" order="8030.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:title="IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:title="definition: StatementLineItems to IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" use="optional" order="8040.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="RestructuringCharges" xlink:title="RestructuringCharges" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="RestructuringCharges" xlink:title="definition: StatementLineItems to RestructuringCharges" use="optional" order="8050.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/CashFlows">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="StatementLineItems" xlink:title="StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="StatementTable" xlink:title="StatementTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementLineItems" xlink:to="StatementTable" xlink:title="definition: StatementLineItems to StatementTable" order="10.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementTable" xlink:to="StatementScenarioAxis" xlink:title="definition: StatementTable to StatementScenarioAxis" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:title="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:title="definition: StatementLineItems to NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="NetIncomeLoss" xlink:title="NetIncomeLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="NetIncomeLoss" xlink:title="definition: NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract to NetIncomeLoss" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:title="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:title="definition: NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract to AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="DepreciationDepletionAndAmortization" xlink:title="DepreciationDepletionAndAmortization" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="DepreciationDepletionAndAmortization" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to DepreciationDepletionAndAmortization" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RecoveriesAndRefundsOfRegulatoryAssetsAndLiabilities" xlink:label="RecoveriesAndRefundsOfRegulatoryAssetsAndLiabilities" xlink:title="RecoveriesAndRefundsOfRegulatoryAssetsAndLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="RecoveriesAndRefundsOfRegulatoryAssetsAndLiabilities" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to RecoveriesAndRefundsOfRegulatoryAssetsAndLiabilities" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="ProvisionForDoubtfulAccounts" xlink:title="ProvisionForDoubtfulAccounts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="ProvisionForDoubtfulAccounts" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to ProvisionForDoubtfulAccounts" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="PensionAndOtherPostretirementBenefitExpense" xlink:title="PensionAndOtherPostretirementBenefitExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="PensionAndOtherPostretirementBenefitExpense" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to PensionAndOtherPostretirementBenefitExpense" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="PensionAndOtherPostretirementBenefitContributions" xlink:title="PensionAndOtherPostretirementBenefitContributions" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="PensionAndOtherPostretirementBenefitContributions" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to PensionAndOtherPostretirementBenefitContributions" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="DeferredIncomeTaxesAndTaxCredits" xlink:title="DeferredIncomeTaxesAndTaxCredits" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="DeferredIncomeTaxesAndTaxCredits" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to DeferredIncomeTaxesAndTaxCredits" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:label="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:title="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to PaymentsForRefundsOfPaymentsReceivedFromRelatedPartiesForUnfundedRetirementBenefitCosts" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:label="IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:title="IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:label="OtherOperatingActivitiesCashFlowStatement" xlink:title="OtherOperatingActivitiesCashFlowStatement" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="OtherOperatingActivitiesCashFlowStatement" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to OtherOperatingActivitiesCashFlowStatement" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="IncreaseDecreaseInOperatingCapitalAbstract" xlink:title="IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="IncreaseDecreaseInOperatingCapitalAbstract" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to IncreaseDecreaseInOperatingCapitalAbstract" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInMarginDepositsOutstanding" xlink:label="IncreaseDecreaseInMarginDepositsOutstanding" xlink:title="IncreaseDecreaseInMarginDepositsOutstanding" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInMarginDepositsOutstanding" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInMarginDepositsOutstanding" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="IncreaseDecreaseInReceivables" xlink:title="IncreaseDecreaseInReceivables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInReceivables" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInReceivables" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="IncreaseDecreaseInInventories" xlink:title="IncreaseDecreaseInInventories" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInInventories" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInInventories" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes" xlink:label="IncreaseDecreaseInPrepaidTaxes" xlink:title="IncreaseDecreaseInPrepaidTaxes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInPrepaidTaxes" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInPrepaidTaxes" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="IncreaseDecreaseInOtherOperatingAssets" xlink:title="IncreaseDecreaseInOtherOperatingAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInOtherOperatingAssets" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInOtherOperatingAssets" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="IncreaseDecreaseInAccountsPayable" xlink:title="IncreaseDecreaseInAccountsPayable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInAccountsPayable" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInAccountsPayable" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="IncreaseDecreaseInOtherOperatingLiabilities" xlink:title="IncreaseDecreaseInOtherOperatingLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInOtherOperatingLiabilities" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInOtherOperatingLiabilities" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_IncreaseDecreaseInPrepaidTaxesAndTaxesReceivableCurrent" xlink:label="IncreaseDecreaseInPrepaidTaxesAndTaxesReceivableCurrent" xlink:title="IncreaseDecreaseInPrepaidTaxesAndTaxesReceivableCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInPrepaidTaxesAndTaxesReceivableCurrent" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInPrepaidTaxesAndTaxesReceivableCurrent" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable" xlink:label="IncreaseDecreaseInAccruedTaxesPayable" xlink:title="IncreaseDecreaseInAccruedTaxesPayable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="IncreaseDecreaseInAccruedTaxesPayable" xlink:title="definition: IncreaseDecreaseInOperatingCapitalAbstract to IncreaseDecreaseInAccruedTaxesPayable" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromDecommissioningFund" xlink:label="ProceedsFromDecommissioningFund" xlink:title="ProceedsFromDecommissioningFund" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="ProceedsFromDecommissioningFund" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to ProceedsFromDecommissioningFund" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" xlink:label="IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" xlink:title="IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" xlink:title="definition: AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract to IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:title="NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:title="definition: NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract to NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:label="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:title="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:title="definition: StatementLineItems to NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="PaymentsToAcquirePropertyPlantAndEquipment" xlink:title="PaymentsToAcquirePropertyPlantAndEquipment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsToAcquirePropertyPlantAndEquipment" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to PaymentsToAcquirePropertyPlantAndEquipment" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:title="ProceedsFromSaleOfPropertyPlantAndEquipment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to ProceedsFromSaleOfPropertyPlantAndEquipment" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="PaymentsForProceedsFromOtherInvestingActivities" xlink:title="PaymentsForProceedsFromOtherInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsForProceedsFromOtherInvestingActivities" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to PaymentsForProceedsFromOtherInvestingActivities" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:title="NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ProceedsFromTransferOfPensionPlanObligationsAndAssetsToAffiliates" xlink:label="ProceedsFromTransferOfPensionPlanObligationsAndAssetsToAffiliates" xlink:title="ProceedsFromTransferOfPensionPlanObligationsAndAssetsToAffiliates" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromTransferOfPensionPlanObligationsAndAssetsToAffiliates" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to ProceedsFromTransferOfPensionPlanObligationsAndAssetsToAffiliates" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_RestrictedCashUsedForRepaymentOfLongTermDebt" xlink:label="RestrictedCashUsedForRepaymentOfLongTermDebt" xlink:title="RestrictedCashUsedForRepaymentOfLongTermDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="RestrictedCashUsedForRepaymentOfLongTermDebt" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to RestrictedCashUsedForRepaymentOfLongTermDebt" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PaymentsForTransmissionInterconnection" xlink:label="PaymentsForTransmissionInterconnection" xlink:title="PaymentsForTransmissionInterconnection" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsForTransmissionInterconnection" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to PaymentsForTransmissionInterconnection" use="optional" order="8020.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_ProceedsReceivedFromTransmissionInterconnection" xlink:label="ProceedsReceivedFromTransmissionInterconnection" xlink:title="ProceedsReceivedFromTransmissionInterconnection" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsReceivedFromTransmissionInterconnection" xlink:title="definition: NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract to ProceedsReceivedFromTransmissionInterconnection" use="optional" order="8030.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:title="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:title="definition: StatementLineItems to NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:label="ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:title="ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" use="optional" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="RepaymentsOfNotesPayable" xlink:title="RepaymentsOfNotesPayable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="RepaymentsOfNotesPayable" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to RepaymentsOfNotesPayable" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfRelatedPartyDebt" xlink:label="RepaymentsOfRelatedPartyDebt" xlink:title="RepaymentsOfRelatedPartyDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="RepaymentsOfRelatedPartyDebt" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to RepaymentsOfRelatedPartyDebt" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="RepaymentsOfLongTermDebt" xlink:title="RepaymentsOfLongTermDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="RepaymentsOfLongTermDebt" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to RepaymentsOfLongTermDebt" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="PaymentsOfDistributionsToAffiliates" xlink:title="PaymentsOfDistributionsToAffiliates" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsOfDistributionsToAffiliates" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to PaymentsOfDistributionsToAffiliates" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromContributionsFromParent" xlink:label="ProceedsFromContributionsFromParent" xlink:title="ProceedsFromContributionsFromParent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromContributionsFromParent" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to ProceedsFromContributionsFromParent" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfCapitalDistribution" xlink:label="PaymentsOfCapitalDistribution" xlink:title="PaymentsOfCapitalDistribution" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsOfCapitalDistribution" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to PaymentsOfCapitalDistribution" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:title="PaymentsOfDividendsPreferredStockAndPreferenceStock" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to PaymentsOfDividendsPreferredStockAndPreferenceStock" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="ProceedsFromPaymentsForOtherFinancingActivities" xlink:title="ProceedsFromPaymentsForOtherFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromPaymentsForOtherFinancingActivities" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to ProceedsFromPaymentsForOtherFinancingActivities" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:title="NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="ProceedsFromIssuanceOfLongTermDebt" xlink:title="ProceedsFromIssuanceOfLongTermDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="ProceedsFromIssuanceOfLongTermDebt" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to ProceedsFromIssuanceOfLongTermDebt" use="optional" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaturitiesOfSeniorDebt" xlink:label="MaturitiesOfSeniorDebt" xlink:title="MaturitiesOfSeniorDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="MaturitiesOfSeniorDebt" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to MaturitiesOfSeniorDebt" use="optional" order="8010.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="PaymentsOfDividendsCommonStock" xlink:title="PaymentsOfDividendsCommonStock" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="PaymentsOfDividendsCommonStock" xlink:title="definition: NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract to PaymentsOfDividendsCommonStock" use="optional" order="8020.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInContinuingOperations" xlink:label="NetCashProvidedByUsedInContinuingOperations" xlink:title="NetCashProvidedByUsedInContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="NetCashProvidedByUsedInContinuingOperations" xlink:title="definition: StatementLineItems to NetCashProvidedByUsedInContinuingOperations" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="CashAndCashEquivalentsAtCarryingValue" xlink:title="CashAndCashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="CashAndCashEquivalentsAtCarryingValue" xlink:title="definition: StatementLineItems to CashAndCashEquivalentsAtCarryingValue" use="optional" order="60.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/StatementsOfCommonShareholdersEquity">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" use="optional" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="StatementLineItems" xlink:title="StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="StatementTable" xlink:title="StatementTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementLineItems" xlink:to="StatementTable" xlink:title="definition: StatementLineItems to StatementTable" order="10.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementTable" xlink:to="StatementScenarioAxis" xlink:title="definition: StatementTable to StatementScenarioAxis" use="optional" order="11.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="StatementEquityComponentsAxis" xlink:title="StatementEquityComponentsAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementTable" xlink:to="StatementEquityComponentsAxis" xlink:title="definition: StatementTable to StatementEquityComponentsAxis" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="EquityComponentDomain" xlink:title="EquityComponentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementEquityComponentsAxis" xlink:to="EquityComponentDomain" xlink:title="definition: StatementEquityComponentsAxis to EquityComponentDomain" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="EquityComponentDomain_2" xlink:title="EquityComponentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementEquityComponentsAxis" xlink:to="EquityComponentDomain_2" xlink:title="definition: StatementEquityComponentsAxis to EquityComponentDomain" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeMember" xlink:label="ComprehensiveIncomeMember" xlink:title="ComprehensiveIncomeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityComponentDomain" xlink:to="ComprehensiveIncomeMember" xlink:title="definition: EquityComponentDomain to ComprehensiveIncomeMember" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockMember" xlink:label="CommonStockMember" xlink:title="CommonStockMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityComponentDomain" xlink:to="CommonStockMember" xlink:title="definition: EquityComponentDomain to CommonStockMember" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="AdditionalPaidInCapitalMember" xlink:title="AdditionalPaidInCapitalMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityComponentDomain" xlink:to="AdditionalPaidInCapitalMember" xlink:title="definition: EquityComponentDomain to AdditionalPaidInCapitalMember" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="RetainedEarningsMember" xlink:title="RetainedEarningsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityComponentDomain" xlink:to="RetainedEarningsMember" xlink:title="definition: EquityComponentDomain to RetainedEarningsMember" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="AccumulatedOtherComprehensiveIncomeMember" xlink:title="AccumulatedOtherComprehensiveIncomeMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityComponentDomain" xlink:to="AccumulatedOtherComprehensiveIncomeMember" xlink:title="definition: EquityComponentDomain to AccumulatedOtherComprehensiveIncomeMember" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="IncreaseDecreaseInStockholdersEquityRollForward" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementLineItems" xlink:to="IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="definition: StatementLineItems to IncreaseDecreaseInStockholdersEquityRollForward" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="ComprehensiveIncomeNetOfTax" xlink:title="ComprehensiveIncomeNetOfTax" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="ComprehensiveIncomeNetOfTax" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to ComprehensiveIncomeNetOfTax" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_NetEquityInfusionsFromParent" xlink:label="NetEquityInfusionsFromParent" xlink:title="NetEquityInfusionsFromParent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="NetEquityInfusionsFromParent" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to NetEquityInfusionsFromParent" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_AdjustmentsToAdditionalPaidInCapitalReturnOfCapitalToParent" xlink:label="AdjustmentsToAdditionalPaidInCapitalReturnOfCapitalToParent" xlink:title="AdjustmentsToAdditionalPaidInCapitalReturnOfCapitalToParent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="AdjustmentsToAdditionalPaidInCapitalReturnOfCapitalToParent" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to AdjustmentsToAdditionalPaidInCapitalReturnOfCapitalToParent" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="DividendsCommonStockCash" xlink:title="DividendsCommonStockCash" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="DividendsCommonStockCash" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to DividendsCommonStockCash" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="StockholdersEquityOther" xlink:title="StockholdersEquityOther" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="StockholdersEquityOther" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to StockholdersEquityOther" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="StockholdersEquity" xlink:title="StockholdersEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="StockholdersEquity" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to StockholdersEquity" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:label="StockholdersEquityPeriodIncreaseDecrease" xlink:title="StockholdersEquityPeriodIncreaseDecrease" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="StockholdersEquityPeriodIncreaseDecrease" xlink:title="definition: IncreaseDecreaseInStockholdersEquityRollForward to StockholdersEquityPeriodIncreaseDecrease" order="80.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.wisconsinpublicservice.com/role/StatementOfCapitalization">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfCapitalizationLineItems" xlink:label="ScheduleOfCapitalizationLineItems" xlink:title="ScheduleOfCapitalizationLineItems" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfCapitalizationTable" xlink:label="ScheduleOfCapitalizationTable" xlink:title="ScheduleOfCapitalizationTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="ScheduleOfCapitalizationTable" xlink:title="definition: ScheduleOfCapitalizationLineItems to ScheduleOfCapitalizationTable" order="10.0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="StatementClassOfStockAxis" xlink:title="StatementClassOfStockAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfCapitalizationTable" xlink:to="StatementClassOfStockAxis" xlink:title="definition: ScheduleOfCapitalizationTable to StatementClassOfStockAxis" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="ClassOfStockDomain" xlink:title="ClassOfStockDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="StatementClassOfStockAxis" xlink:to="ClassOfStockDomain" xlink:title="definition: StatementClassOfStockAxis to ClassOfStockDomain" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="ClassOfStockDomain_2" xlink:title="ClassOfStockDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementClassOfStockAxis" xlink:to="ClassOfStockDomain_2" xlink:title="definition: StatementClassOfStockAxis to ClassOfStockDomain" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PreferredStock5.00PercentSeriesMember" xlink:label="PreferredStock5.00PercentSeriesMember" xlink:title="PreferredStock5.00PercentSeriesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ClassOfStockDomain" xlink:to="PreferredStock5.00PercentSeriesMember" xlink:title="definition: ClassOfStockDomain to PreferredStock5.00PercentSeriesMember" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PreferredStock5.04PercentSeriesMember" xlink:label="PreferredStock5.04PercentSeriesMember" xlink:title="PreferredStock5.04PercentSeriesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ClassOfStockDomain" xlink:to="PreferredStock5.04PercentSeriesMember" xlink:title="definition: ClassOfStockDomain to PreferredStock5.04PercentSeriesMember" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PreferredStock5.08PercentSeriesMember" xlink:label="PreferredStock5.08PercentSeriesMember" xlink:title="PreferredStock5.08PercentSeriesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ClassOfStockDomain" xlink:to="PreferredStock5.08PercentSeriesMember" xlink:title="definition: ClassOfStockDomain to PreferredStock5.08PercentSeriesMember" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PreferredStock6.76PercentSeriesMember" xlink:label="PreferredStock6.76PercentSeriesMember" xlink:title="PreferredStock6.76PercentSeriesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ClassOfStockDomain" xlink:to="PreferredStock6.76PercentSeriesMember" xlink:title="definition: ClassOfStockDomain to PreferredStock6.76PercentSeriesMember" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_PreferredStock6.88PercentSeriesMember" xlink:label="PreferredStock6.88PercentSeriesMember" xlink:title="PreferredStock6.88PercentSeriesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ClassOfStockDomain" xlink:to="PreferredStock6.88PercentSeriesMember" xlink:title="definition: ClassOfStockDomain to PreferredStock6.88PercentSeriesMember" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="DebtInstrumentAxis" xlink:title="DebtInstrumentAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ScheduleOfCapitalizationTable" xlink:to="DebtInstrumentAxis" xlink:title="definition: ScheduleOfCapitalizationTable to DebtInstrumentAxis" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="DebtInstrumentNameDomain" xlink:title="DebtInstrumentNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="DebtInstrumentAxis" xlink:to="DebtInstrumentNameDomain" xlink:title="definition: DebtInstrumentAxis to DebtInstrumentNameDomain" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="DebtInstrumentNameDomain_2" xlink:title="DebtInstrumentNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DebtInstrumentAxis" xlink:to="DebtInstrumentNameDomain_2" xlink:title="definition: DebtInstrumentAxis to DebtInstrumentNameDomain" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebtToParent8.76PercentSeriesDue2015Member" xlink:label="LongTermDebtToParent8.76PercentSeriesDue2015Member" xlink:title="LongTermDebtToParent8.76PercentSeriesDue2015Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebtToParent8.76PercentSeriesDue2015Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebtToParent8.76PercentSeriesDue2015Member" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebtToParent7.35PercentSeriesDue2016Member" xlink:label="LongTermDebtToParent7.35PercentSeriesDue2016Member" xlink:title="LongTermDebtToParent7.35PercentSeriesDue2016Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebtToParent7.35PercentSeriesDue2016Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebtToParent7.35PercentSeriesDue2016Member" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt7.125PercentSeriesDue2023Member" xlink:label="LongTermDebt7.125PercentSeriesDue2023Member" xlink:title="LongTermDebt7.125PercentSeriesDue2023Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt7.125PercentSeriesDue2023Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt7.125PercentSeriesDue2023Member" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt4.875PercentSeriesDue2012Member" xlink:label="LongTermDebt4.875PercentSeriesDue2012Member" xlink:title="LongTermDebt4.875PercentSeriesDue2012Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt4.875PercentSeriesDue2012Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt4.875PercentSeriesDue2012Member" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt3.95PercentSeriesDue2013Member" xlink:label="LongTermDebt3.95PercentSeriesDue2013Member" xlink:title="LongTermDebt3.95PercentSeriesDue2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt3.95PercentSeriesDue2013Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt3.95PercentSeriesDue2013Member" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt4.80PercentSeriesDue2013Member" xlink:label="LongTermDebt4.80PercentSeriesDue2013Member" xlink:title="LongTermDebt4.80PercentSeriesDue2013Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt4.80PercentSeriesDue2013Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt4.80PercentSeriesDue2013Member" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt6.375PercentSeriesDue2015Member" xlink:label="LongTermDebt6.375PercentSeriesDue2015Member" xlink:title="LongTermDebt6.375PercentSeriesDue2015Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt6.375PercentSeriesDue2015Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt6.375PercentSeriesDue2015Member" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt5.65PercentSeriesDue2017Member" xlink:label="LongTermDebt5.65PercentSeriesDue2017Member" xlink:title="LongTermDebt5.65PercentSeriesDue2017Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt5.65PercentSeriesDue2017Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt5.65PercentSeriesDue2017Member" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt6.08PercentSeriesDue2028Member" xlink:label="LongTermDebt6.08PercentSeriesDue2028Member" xlink:title="LongTermDebt6.08PercentSeriesDue2028Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt6.08PercentSeriesDue2028Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt6.08PercentSeriesDue2028Member" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt5.55PercentSeriesDue2036Member" xlink:label="LongTermDebt5.55PercentSeriesDue2036Member" xlink:title="LongTermDebt5.55PercentSeriesDue2036Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt5.55PercentSeriesDue2036Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt5.55PercentSeriesDue2036Member" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_LongTermDebt6.125PercentSeriesDue2011Member" xlink:label="LongTermDebt6.125PercentSeriesDue2011Member" xlink:title="LongTermDebt6.125PercentSeriesDue2011Member" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DebtInstrumentNameDomain" xlink:to="LongTermDebt6.125PercentSeriesDue2011Member" xlink:title="definition: DebtInstrumentNameDomain to LongTermDebt6.125PercentSeriesDue2011Member" order="8000.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="CommonStockValue" xlink:title="CommonStockValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="CommonStockValue" xlink:title="definition: ScheduleOfCapitalizationLineItems to CommonStockValue" use="optional" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="AdditionalPaidInCapitalCommonStock" xlink:title="AdditionalPaidInCapitalCommonStock" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="AdditionalPaidInCapitalCommonStock" xlink:title="definition: ScheduleOfCapitalizationLineItems to AdditionalPaidInCapitalCommonStock" use="optional" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="RetainedEarningsAccumulatedDeficit" xlink:title="RetainedEarningsAccumulatedDeficit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="RetainedEarningsAccumulatedDeficit" xlink:title="definition: ScheduleOfCapitalizationLineItems to RetainedEarningsAccumulatedDeficit" use="optional" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_CommonStockEquity" xlink:label="CommonStockEquity" xlink:title="CommonStockEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="CommonStockEquity" xlink:title="definition: ScheduleOfCapitalizationLineItems to CommonStockEquity" use="optional" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage" xlink:label="PreferredStockDividendRatePercentage" xlink:title="PreferredStockDividendRatePercentage" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="PreferredStockDividendRatePercentage" xlink:title="definition: ScheduleOfCapitalizationLineItems to PreferredStockDividendRatePercentage" use="optional" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="PreferredStockSharesOutstanding" xlink:title="PreferredStockSharesOutstanding" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="PreferredStockSharesOutstanding" xlink:title="definition: ScheduleOfCapitalizationLineItems to PreferredStockSharesOutstanding" use="optional" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="PreferredStockValue" xlink:title="PreferredStockValue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="PreferredStockValue" xlink:title="definition: ScheduleOfCapitalizationLineItems to PreferredStockValue" use="optional" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="DebtInstrumentInterestRateStatedPercentage" xlink:title="DebtInstrumentInterestRateStatedPercentage" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="DebtInstrumentInterestRateStatedPercentage" xlink:title="definition: ScheduleOfCapitalizationLineItems to DebtInstrumentInterestRateStatedPercentage" use="optional" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="NotesPayableRelatedPartiesNoncurrent" xlink:title="NotesPayableRelatedPartiesNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="NotesPayableRelatedPartiesNoncurrent" xlink:title="definition: ScheduleOfCapitalizationLineItems to NotesPayableRelatedPartiesNoncurrent" use="optional" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SecuredDebt" xlink:label="SecuredDebt" xlink:title="SecuredDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="SecuredDebt" xlink:title="definition: ScheduleOfCapitalizationLineItems to SecuredDebt" use="optional" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SeniorNotes" xlink:label="SeniorNotes" xlink:title="SeniorNotes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="SeniorNotes" xlink:title="definition: ScheduleOfCapitalizationLineItems to SeniorNotes" use="optional" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="wps-20120930.xsd#wps_FirstMortgageBondsAndSeniorNotes" xlink:label="FirstMortgageBondsAndSeniorNotes" xlink:title="FirstMortgageBondsAndSeniorNotes" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="FirstMortgageBondsAndSeniorNotes" xlink:title="definition: ScheduleOfCapitalizationLineItems to FirstMortgageBondsAndSeniorNotes" use="optional" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="DebtInstrumentUnamortizedDiscount" xlink:title="DebtInstrumentUnamortizedDiscount" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="DebtInstrumentUnamortizedDiscount" xlink:title="definition: ScheduleOfCapitalizationLineItems to DebtInstrumentUnamortizedDiscount" use="optional" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebt" xlink:label="LongTermDebt" xlink:title="LongTermDebt" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="LongTermDebt" xlink:title="definition: ScheduleOfCapitalizationLineItems to LongTermDebt" use="optional" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="LongTermDebtCurrent" xlink:title="LongTermDebtCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="LongTermDebtCurrent" xlink:title="definition: ScheduleOfCapitalizationLineItems to LongTermDebtCurrent" use="optional" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="LongTermDebtNoncurrent" xlink:title="LongTermDebtNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="LongTermDebtNoncurrent" xlink:title="definition: ScheduleOfCapitalizationLineItems to LongTermDebtNoncurrent" use="optional" order="170.0" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="CapitalizationLongtermDebtAndEquity" xlink:title="CapitalizationLongtermDebtAndEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ScheduleOfCapitalizationLineItems" xlink:to="CapitalizationLongtermDebtAndEquity" xlink:title="definition: ScheduleOfCapitalizationLineItems to CapitalizationLongtermDebtAndEquity" use="optional" order="180.0" />
  </link:definitionLink>
</link:linkbase>
