<?xml version="1.0" encoding="us-ascii"?>
<!-- Prepared by Clarity FSR  v6.6.0.467 using Fujitsu Interstage XWand -->
<linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/instance http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfIncomeUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_MGEEnergyIncConsolidatedStatementsOfIncomeUnaudited" />
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_ConsolidatedBalanceSheetsUnaudited" />
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_MGEEnergyIncConsolidatedStatementsOfCashFlowsUnaudited" />
  <roleRef roleURI="http://www.mgeenergy.com/role/DisclosurePensionAndOtherPostretirementPlansDetails" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_DisclosurePensionAndOtherPostretirementPlansDetails" />
  <roleRef roleURI="http://www.mgeenergy.com/role/DisclosureSegmentInformationDetails" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_DisclosureSegmentInformationDetails" />
  <roleRef roleURI="http://www.mgeenergy.com/role/DisclosureFairValueOfFinancialInstrumentsDetails2" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_DisclosureFairValueOfFinancialInstrumentsDetails2" />
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementMadisonGasAndElectricCompanyConsolidatedStatementsOfIncomeUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_MadisonGasAndElectricCompanyConsolidatedStatementsOfIncomeUnaudited" />
  <roleRef roleURI="http://www.mgeenergy.com/role/DisclosureInvestmentInATCDetails2" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_InvestmentInATCDetails2" />
  <roleRef roleURI="http://www.mgeenergy.com/role/DisclosureCommitmentsAndContingenciesDetails2" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_CommitmentsAndContingenciesDetails2" />
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_MGEEnergyIncConsolidatedStatementsOfComprehensiveIncomeUnaudited" />
  <roleRef roleURI="http://www.mgeenergy.com/role/StatementMadisonGasAndElectricCompanyConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="mgee-20120930.xsd#mgee_ELRID_MadisonGasAndElectricCompanyConsolidatedStatementsOfComprehensiveIncomeUnaudited" />
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfIncomeUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_117" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_118" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_117" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_118" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_121" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_122" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_121" xlink:to="Locator_us-gaap_OperatingIncomeLoss_122" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_127" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_128" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_127" xlink:to="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_128" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_131" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricDomesticRegulatedRevenue" xlink:label="Locator_us-gaap_ElectricDomesticRegulatedRevenue_132" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_131" xlink:to="Locator_us-gaap_ElectricDomesticRegulatedRevenue_132" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_133" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GasDomesticRegulatedRevenue" xlink:label="Locator_us-gaap_GasDomesticRegulatedRevenue_134" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_133" xlink:to="Locator_us-gaap_GasDomesticRegulatedRevenue_134" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_135" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_UnregulatedOperatingRevenue_136" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_135" xlink:to="Locator_us-gaap_UnregulatedOperatingRevenue_136" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_129" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_130" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_129" xlink:to="Locator_us-gaap_UtilitiesOperatingExpense_130" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_137" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UtilitiesOperatingExpenseFuelForElectricGeneration" xlink:label="Locator_mgee_UtilitiesOperatingExpenseFuelForElectricGeneration_138" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_137" xlink:to="Locator_mgee_UtilitiesOperatingExpenseFuelForElectricGeneration_138" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_139" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpensePurchasedPower" xlink:label="Locator_us-gaap_UtilitiesOperatingExpensePurchasedPower_140" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_139" xlink:to="Locator_us-gaap_UtilitiesOperatingExpensePurchasedPower_140" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_141" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UtilitiesOperatingExpenseCostOfGasSold" xlink:label="Locator_mgee_UtilitiesOperatingExpenseCostOfGasSold_142" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_141" xlink:to="Locator_mgee_UtilitiesOperatingExpenseCostOfGasSold_142" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_143" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_144" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_143" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_144" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_145" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_146" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_145" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_146" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_147" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseTaxes" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseTaxes_148" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_147" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseTaxes_148" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_123" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_124" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_123" xlink:to="Locator_us-gaap_InterestExpense_124" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_125" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_126" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_125" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_126" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_119" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_120" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_119" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_120" order="2.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementConsolidatedBalanceSheetsUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_255" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_256" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_255" xlink:to="Locator_us-gaap_LiabilitiesCurrent_256" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_261" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="Locator_us-gaap_LongTermDebtCurrent_262" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_261" xlink:to="Locator_us-gaap_LongTermDebtCurrent_262" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_263" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="Locator_us-gaap_ShortTermBorrowings_264" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_263" xlink:to="Locator_us-gaap_ShortTermBorrowings_264" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_265" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="Locator_us-gaap_AccountsPayableCurrent_266" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_265" xlink:to="Locator_us-gaap_AccountsPayableCurrent_266" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_267" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_AccruedInterestAndTaxes" xlink:label="Locator_mgee_AccruedInterestAndTaxes_268" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_267" xlink:to="Locator_mgee_AccruedInterestAndTaxes_268" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_269" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesCurrent_270" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_269" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesCurrent_270" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_271" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesCurrent_272" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_271" xlink:to="Locator_us-gaap_OtherLiabilitiesCurrent_272" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_273" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="Locator_us-gaap_EmployeeRelatedLiabilitiesCurrent_274" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_273" xlink:to="Locator_us-gaap_EmployeeRelatedLiabilitiesCurrent_274" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_275" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateCurrent" xlink:label="Locator_us-gaap_DueToAffiliateCurrent_276" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_275" xlink:to="Locator_us-gaap_DueToAffiliateCurrent_276" order="8.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_277" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesCurrent_278" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_277" xlink:to="Locator_us-gaap_DerivativeLiabilitiesCurrent_278" order="9.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_257" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_258" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_257" xlink:to="Locator_us-gaap_LiabilitiesNoncurrent_258" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_279" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_280" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_279" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_280" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_281" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedDeferredInvestmentTaxCredit" xlink:label="Locator_us-gaap_AccumulatedDeferredInvestmentTaxCredit_282" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_281" xlink:to="Locator_us-gaap_AccumulatedDeferredInvestmentTaxCredit_282" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_283" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="Locator_us-gaap_RegulatoryLiabilityNoncurrent_284" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_283" xlink:to="Locator_us-gaap_RegulatoryLiabilityNoncurrent_284" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_285" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_286" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_285" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_286" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_287" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrent_288" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_287" xlink:to="Locator_us-gaap_OtherLiabilitiesNoncurrent_288" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="Locator_us-gaap_LiabilitiesNoncurrent_289" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_290" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesNoncurrent_289" xlink:to="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_290" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_259" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_260" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_259" xlink:to="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_260" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_291" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="Locator_us-gaap_LongTermDebtNoncurrent_292" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_291" xlink:to="Locator_us-gaap_LongTermDebtNoncurrent_292" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_293" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_294" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_293" xlink:to="Locator_us-gaap_StockholdersEquity_294" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_295" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="Locator_us-gaap_MinorityInterest_296" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CapitalizationLongtermDebtAndEquity_295" xlink:to="Locator_us-gaap_MinorityInterest_296" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_297" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_298" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_297" xlink:to="Locator_us-gaap_AssetsCurrent_298" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_309" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_310" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_309" xlink:to="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_310" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_311" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarginDepositAssets" xlink:label="Locator_us-gaap_MarginDepositAssets_312" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_311" xlink:to="Locator_us-gaap_MarginDepositAssets_312" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_313" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_314" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_313" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrent_314" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_315" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="Locator_us-gaap_OtherReceivablesNetCurrent_316" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_315" xlink:to="Locator_us-gaap_OtherReceivablesNetCurrent_316" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_317" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UnbilledRevenues" xlink:label="Locator_mgee_UnbilledRevenues_318" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_317" xlink:to="Locator_mgee_UnbilledRevenues_318" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_319" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherInventorySupplies" xlink:label="Locator_us-gaap_OtherInventorySupplies_320" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_319" xlink:to="Locator_us-gaap_OtherInventorySupplies_320" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_321" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnergyRelatedInventoryOtherFossilFuel" xlink:label="Locator_us-gaap_EnergyRelatedInventoryOtherFossilFuel_322" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_321" xlink:to="Locator_us-gaap_EnergyRelatedInventoryOtherFossilFuel_322" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_323" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnergyRelatedInventoryGasStoredUnderground" xlink:label="Locator_us-gaap_EnergyRelatedInventoryGasStoredUnderground_324" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_323" xlink:to="Locator_us-gaap_EnergyRelatedInventoryGasStoredUnderground_324" order="8.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_325" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="Locator_us-gaap_PrepaidTaxes_326" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_325" xlink:to="Locator_us-gaap_PrepaidTaxes_326" order="9.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_327" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsCurrent_328" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_327" xlink:to="Locator_us-gaap_RegulatoryAssetsCurrent_328" order="10.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_329" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="Locator_us-gaap_OtherAssetsCurrent_330" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_329" xlink:to="Locator_us-gaap_OtherAssetsCurrent_330" order="11.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_331" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateCurrent" xlink:label="Locator_us-gaap_DueFromAffiliateCurrent_332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_331" xlink:to="Locator_us-gaap_DueFromAffiliateCurrent_332" order="12.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_299" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_TotalPropertyPlantAndEquipment" xlink:label="Locator_mgee_TotalPropertyPlantAndEquipment_300" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_299" xlink:to="Locator_mgee_TotalPropertyPlantAndEquipment_300" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_TotalPropertyPlantAndEquipment" xlink:label="Locator_mgee_TotalPropertyPlantAndEquipment_333" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNet_334" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_TotalPropertyPlantAndEquipment_333" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNet_334" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_TotalPropertyPlantAndEquipment" xlink:label="Locator_mgee_TotalPropertyPlantAndEquipment_335" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="Locator_us-gaap_ConstructionInProgressGross_336" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_TotalPropertyPlantAndEquipment_335" xlink:to="Locator_us-gaap_ConstructionInProgressGross_336" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_301" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsNoncurrent_302" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_301" xlink:to="Locator_us-gaap_RegulatoryAssetsNoncurrent_302" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_303" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="Locator_us-gaap_OtherAssetsNoncurrent_304" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_303" xlink:to="Locator_us-gaap_OtherAssetsNoncurrent_304" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_305" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_306" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_305" xlink:to="Locator_us-gaap_Investments_306" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_307" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateNoncurrent" xlink:label="Locator_us-gaap_DueFromAffiliateNoncurrent_308" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_307" xlink:to="Locator_us-gaap_DueFromAffiliateNoncurrent_308" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_337" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_338" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_337" xlink:to="Locator_us-gaap_StockholdersEquity_338" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_339" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="Locator_us-gaap_MinorityInterest_340" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_339" xlink:to="Locator_us-gaap_MinorityInterest_340" order="2.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfCashFlowsUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_591" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_592" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_591" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_592" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_597" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_598" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_597" xlink:to="Locator_us-gaap_NetIncomeLoss_598" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_599" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_600" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_599" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_600" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_601" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" xlink:label="Locator_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_602" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_601" xlink:to="Locator_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_602" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_603" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="Locator_us-gaap_ProvisionForDoubtfulAccounts_604" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_603" xlink:to="Locator_us-gaap_ProvisionForDoubtfulAccounts_604" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_605" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitExpense_606" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_605" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitExpense_606" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_607" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_608" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_607" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_608" order="6.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_609" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="Locator_us-gaap_GainLossOnSaleOfInvestments_610" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_609" xlink:to="Locator_us-gaap_GainLossOnSaleOfInvestments_610" order="7.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_611" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="Locator_us-gaap_OtherNoncashIncomeExpense_612" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_611" xlink:to="Locator_us-gaap_OtherNoncashIncomeExpense_612" order="8.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_613" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingAssets" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingAssets_614" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_613" xlink:to="Locator_us-gaap_IncreaseDecreaseInOperatingAssets_614" order="9.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_615" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilities" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingLiabilities_616" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_615" xlink:to="Locator_us-gaap_IncreaseDecreaseInOperatingLiabilities_616" order="10.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_617" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:label="Locator_us-gaap_EquityMethodInvestmentDividendsOrDistributions_618" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_617" xlink:to="Locator_us-gaap_EquityMethodInvestmentDividendsOrDistributions_618" order="11.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_619" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_620" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_619" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_620" order="12.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_621" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet" xlink:label="Locator_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_622" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_621" xlink:to="Locator_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_622" order="13.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_593" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_594" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_593" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_594" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_623" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_624" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_623" xlink:to="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_624" order="1.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_625" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates" xlink:label="Locator_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_626" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_625" xlink:to="Locator_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_626" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_627" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_RepaymentAdvanceToWepcoForAtcElmRoadWork" xlink:label="Locator_mgee_RepaymentAdvanceToWepcoForAtcElmRoadWork_628" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_627" xlink:to="Locator_mgee_RepaymentAdvanceToWepcoForAtcElmRoadWork_628" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_629" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="Locator_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_630" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_629" xlink:to="Locator_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_630" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_631" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_632" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_631" xlink:to="Locator_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_632" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_633" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_634" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_633" xlink:to="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_634" order="6.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_635" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="Locator_us-gaap_PaymentsToAcquireOtherInvestments_636" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_635" xlink:to="Locator_us-gaap_PaymentsToAcquireOtherInvestments_636" order="7.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_595" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_596" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_595" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_596" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_637" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_638" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_637" xlink:to="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_638" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_639" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="Locator_us-gaap_PaymentsOfDividendsCommonStock_640" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_639" xlink:to="Locator_us-gaap_PaymentsOfDividendsCommonStock_640" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_641" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="Locator_us-gaap_RepaymentsOfLongTermDebt_642" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_641" xlink:to="Locator_us-gaap_RepaymentsOfLongTermDebt_642" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_643" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="Locator_us-gaap_ProceedsFromIssuanceOfLongTermDebt_644" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_643" xlink:to="Locator_us-gaap_ProceedsFromIssuanceOfLongTermDebt_644" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_645" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_646" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_645" xlink:to="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_646" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_647" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_648" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_647" xlink:to="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_648" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_649" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_AffiliateFinancingOfElmRoad" xlink:label="Locator_mgee_AffiliateFinancingOfElmRoad_650" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_649" xlink:to="Locator_mgee_AffiliateFinancingOfElmRoad_650" order="7.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_651" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_DistributionsToParentFromNoncontrollingInterest" xlink:label="Locator_mgee_DistributionsToParentFromNoncontrollingInterest_652" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_651" xlink:to="Locator_mgee_DistributionsToParentFromNoncontrollingInterest_652" order="8.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_653" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders" xlink:label="Locator_us-gaap_ProceedsFromMinorityShareholders_654" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_653" xlink:to="Locator_us-gaap_ProceedsFromMinorityShareholders_654" order="9.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_655" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_656" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_655" xlink:to="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_656" order="10.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/DisclosurePensionAndOtherPostretirementPlansDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1139" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanServiceCost_1140" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1139" xlink:to="Locator_us-gaap_DefinedBenefitPlanServiceCost_1140" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1141" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanInterestCost_1142" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1141" xlink:to="Locator_us-gaap_DefinedBenefitPlanInterestCost_1142" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1143" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_1144" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1143" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_1144" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1145" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_1146" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1145" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_1146" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1147" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_1148" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1147" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_1148" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1149" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_1150" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1149" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_1150" order="6.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/DisclosureSegmentInformationDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_1557" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_1558" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_1557" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_1558" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_1565" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationRevenue" xlink:label="Locator_us-gaap_SegmentReportingInformationRevenue_1566" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_1565" xlink:to="Locator_us-gaap_SegmentReportingInformationRevenue_1566" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationRevenue" xlink:label="Locator_us-gaap_SegmentReportingInformationRevenue_1571" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_1572" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_SegmentReportingInformationRevenue_1571" xlink:to="Locator_us-gaap_RegulatedAndUnregulatedOperatingRevenue_1572" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationRevenue" xlink:label="Locator_us-gaap_SegmentReportingInformationRevenue_1573" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:label="Locator_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_1574" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_SegmentReportingInformationRevenue_1573" xlink:to="Locator_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_1574" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_1567" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_1568" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_1567" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_1568" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_1569" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UtilitiesOperatingExpenseExcludingDepreciationAndAmortization" xlink:label="Locator_mgee_UtilitiesOperatingExpenseExcludingDepreciationAndAmortization_1570" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_1569" xlink:to="Locator_mgee_UtilitiesOperatingExpenseExcludingDepreciationAndAmortization_1570" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_1559" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_1560" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_1559" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_1560" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_1561" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_1562" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_1561" xlink:to="Locator_us-gaap_ProfitLoss_1562" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_1575" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_1576" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_1575" xlink:to="Locator_us-gaap_OperatingIncomeLoss_1576" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_1577" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_1578" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_1577" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_1578" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_1579" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_1580" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_1579" xlink:to="Locator_us-gaap_InterestExpense_1580" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_1563" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1564" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_1563" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1564" order="4.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/DisclosureFairValueOfFinancialInstrumentsDetails2">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="Locator_us-gaap_AssetsFairValueDisclosure_1735" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:label="Locator_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_1736" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsFairValueDisclosure_1735" xlink:to="Locator_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_1736" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="Locator_us-gaap_LiabilitiesFairValueDisclosure_1737" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure" xlink:label="Locator_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_1738" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesFairValueDisclosure_1737" xlink:to="Locator_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_1738" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="Locator_us-gaap_LiabilitiesFairValueDisclosure_1739" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_DeferredCompensationFairValueDisclosure" xlink:label="Locator_mgee_DeferredCompensationFairValueDisclosure_1740" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesFairValueDisclosure_1739" xlink:to="Locator_mgee_DeferredCompensationFairValueDisclosure_1740" order="2.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementMadisonGasAndElectricCompanyConsolidatedStatementsOfIncomeUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2309" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UtilitiesOperatingExpenseFuelForElectricGeneration" xlink:label="Locator_mgee_UtilitiesOperatingExpenseFuelForElectricGeneration_2310" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2309" xlink:to="Locator_mgee_UtilitiesOperatingExpenseFuelForElectricGeneration_2310" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2311" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpensePurchasedPower" xlink:label="Locator_us-gaap_UtilitiesOperatingExpensePurchasedPower_2312" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2311" xlink:to="Locator_us-gaap_UtilitiesOperatingExpensePurchasedPower_2312" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2313" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_UtilitiesOperatingExpenseCostOfGasSold" xlink:label="Locator_mgee_UtilitiesOperatingExpenseCostOfGasSold_2314" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2313" xlink:to="Locator_mgee_UtilitiesOperatingExpenseCostOfGasSold_2314" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2315" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_2316" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2315" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_2316" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2317" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_2318" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2317" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_2318" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2319" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpenseTaxes" xlink:label="Locator_us-gaap_UtilitiesOperatingExpenseTaxes_2320" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2319" xlink:to="Locator_us-gaap_UtilitiesOperatingExpenseTaxes_2320" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="Locator_us-gaap_UtilitiesOperatingExpense_2321" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_2322" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_UtilitiesOperatingExpense_2321" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_2322" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_2295" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpenseLongTermDebt" xlink:label="Locator_us-gaap_InterestExpenseLongTermDebt_2296" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InterestExpense_2295" xlink:to="Locator_us-gaap_InterestExpenseLongTermDebt_2296" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_2297" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_InterestIncomeExpenseOtherNet" xlink:label="Locator_mgee_InterestIncomeExpenseOtherNet_2298" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InterestExpense_2297" xlink:to="Locator_mgee_InterestIncomeExpenseOtherNet_2298" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_2299" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:label="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_2300" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InterestExpense_2299" xlink:to="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_2300" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_2283" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_2284" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_2283" xlink:to="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_2284" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_2285" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_2286" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_2285" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_2286" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_2287" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_NonOperatingExpenseTaxes" xlink:label="Locator_mgee_NonOperatingExpenseTaxes_2288" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_2287" xlink:to="Locator_mgee_NonOperatingExpenseTaxes_2288" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_2289" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpense_2290" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_2289" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpense_2290" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_2305" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_2306" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_2305" xlink:to="Locator_us-gaap_ProfitLoss_2306" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_2301" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_IncomeBeforeInterestExpense" xlink:label="Locator_mgee_IncomeBeforeInterestExpense_2302" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_2301" xlink:to="Locator_mgee_IncomeBeforeInterestExpense_2302" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_IncomeBeforeInterestExpense" xlink:label="Locator_mgee_IncomeBeforeInterestExpense_2291" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_2292" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_IncomeBeforeInterestExpense_2291" xlink:to="Locator_us-gaap_OperatingIncomeLoss_2292" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_IncomeBeforeInterestExpense" xlink:label="Locator_mgee_IncomeBeforeInterestExpense_2293" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_2294" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_IncomeBeforeInterestExpense_2293" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_2294" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_2303" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_2304" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_2303" xlink:to="Locator_us-gaap_InterestExpense_2304" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_2307" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2308" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_2307" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2308" order="2.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/DisclosureInvestmentInATCDetails2">
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2471" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:label="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_2472" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2471" xlink:to="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_2472" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2473" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales" xlink:label="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales_2474" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2473" xlink:to="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales_2474" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2475" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationOtherExpense" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationOtherExpense_2476" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2475" xlink:to="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationOtherExpense_2476" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2477" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" xlink:label="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_2478" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes_2477" xlink:to="Locator_mgee_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_2478" order="4.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/DisclosureCommitmentsAndContingenciesDetails2">
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_PurchaseContractsNet" xlink:label="Locator_mgee_PurchaseContractsNet_2559" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_CoalCommitments" xlink:label="Locator_mgee_CoalCommitments_2560" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_PurchaseContractsNet_2559" xlink:to="Locator_mgee_CoalCommitments_2560" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_PurchaseContractsNet" xlink:label="Locator_mgee_PurchaseContractsNet_2561" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_NaturalGasTransportationAndStorageCommitments" xlink:label="Locator_mgee_NaturalGasTransportationAndStorageCommitments_2562" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_PurchaseContractsNet_2561" xlink:to="Locator_mgee_NaturalGasTransportationAndStorageCommitments_2562" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_PurchaseContractsNet" xlink:label="Locator_mgee_PurchaseContractsNet_2563" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_NaturalGasSupplyCommitments" xlink:label="Locator_mgee_NaturalGasSupplyCommitments_2564" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_PurchaseContractsNet_2563" xlink:to="Locator_mgee_NaturalGasSupplyCommitments_2564" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_PurchaseContractsNet" xlink:label="Locator_mgee_PurchaseContractsNet_2565" />
    <loc xlink:type="locator" xlink:href="mgee-20120930.xsd#mgee_PurchasePowerCommitments" xlink:label="Locator_mgee_PurchasePowerCommitments_2566" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_mgee_PurchaseContractsNet_2565" xlink:to="Locator_mgee_PurchasePowerCommitments_2566" order="4.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementMGEEnergyIncConsolidatedStatementsOfComprehensiveIncomeUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2647" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_2648" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2647" xlink:to="Locator_us-gaap_NetIncomeLoss_2648" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2649" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_2650" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2649" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_2650" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2651" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_2652" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2651" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_2652" order="3.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.mgeenergy.com/role/StatementMadisonGasAndElectricCompanyConsolidatedStatementsOfComprehensiveIncomeUnaudited">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2675" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2676" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2675" xlink:to="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2676" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2669" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_2670" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2669" xlink:to="Locator_us-gaap_ProfitLoss_2670" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2671" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_2672" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2671" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_2672" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2673" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_2674" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_2673" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_2674" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2677" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_2678" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_2677" xlink:to="Locator_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_2678" order="2.0" weight="-1" />
  </calculationLink>
</linkbase>
