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   &lt;!-- Begin Block Tagged Note 7 - us-gaap:ScheduleOfVariableInterestEntitiesTextBlock--&gt;
   &lt;div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;7. Variable-Interest Entities&lt;/b&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;Palo Verde Sale Leaseback Trusts&lt;/b&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"&gt;In 1986, APS entered into agreements with three separate variable-interest entity (&amp;#8220;VIE&amp;#8221;)
   lessor trusts in order to sell and lease back interests in Palo Verde Nuclear Generating Station
   (&amp;#8220;Palo Verde&amp;#8221;) Unit 2 and related common facilities. The VIE lessor trusts are single-asset
   leasing entities. APS will pay approximately $49&amp;#160;million per year for the years 2011 to 2015
   related to these leases. The leases do not contain fixed price purchase options or residual value
   guarantees. However, the lease agreements include fixed rate renewal periods which may have a
   significant impact on the VIEs&amp;#8217; economic performance. We have concluded that these fixed rate
   renewal periods may give APS the ability to utilize the asset for a significant portion of the
   asset&amp;#8217;s economic life, and therefore provide APS with the power to direct activities of the VIEs
   that most significantly impact the VIEs&amp;#8217; economic performance. In addition to the fixed rate
   renewal periods, our primary beneficiary analysis also considered that APS is the operating agent
   for Palo Verde, is obligated to decommission the leased assets and has fair value purchase options.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"&gt;For the reasons discussed above, APS consolidates these VIEs. Consolidation of these VIEs
   eliminates the lease accounting and results in changes in our consolidated assets, debt, equity,
   and net income. Assets of the VIEs are restricted and may only be used to settle the VIEs&amp;#8217; debt
   obligations and for payment to the noncontrolling interest holders. Other than the VIEs&amp;#8217; assets
   reported on our consolidated financial statements, the creditors of the VIEs have no other recourse
   to the assets of APS or Pinnacle West, except in certain circumstances such as a default by APS
   under the lease. As a result of consolidation we eliminate rent expense and recognize depreciation
   and interest expense, resulting in an increase in net income for the three months ended March&amp;#160;31,
   2011 of $5&amp;#160;million entirely attributable to the noncontrolling interests. Income attributable to
   Pinnacle West shareholders remains the same. Consolidation of these VIEs also results in changes
   to our Condensed Consolidated Statements of Cash Flows, but does not impact net cash flows.
   &lt;/div&gt;
   &lt;!-- Folio --&gt;
   &lt;!-- /Folio --&gt;
   &lt;/div&gt;
   &lt;!-- PAGEBREAK --&gt;
   &lt;div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "&gt;
   &lt;div align="center" style="font-size: 10pt; margin-top: 0pt"&gt;
   &lt;b&gt;
   &lt;/b&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"&gt;Our Condensed Consolidated Balance Sheets at March&amp;#160;31, 2011 and December&amp;#160;31, 2010 include
   the following amounts relating to the VIEs (in millions):
   &lt;/div&gt;
   &lt;div align="center"&gt;
   &lt;table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%"&gt;
   &lt;!-- Begin Table Head --&gt;
   &lt;tr valign="bottom"&gt;
       &lt;td width="72%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="3%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="1%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="9%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="1%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="3%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="1%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="9%"&gt;&amp;#160;&lt;/td&gt;
       &lt;td width="1%"&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size: 10pt" valign="bottom"&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"&gt;March 31, 2011&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"&gt;December 31, 2010&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;!-- End Table Head --&gt;
   &lt;!-- Begin Table Body --&gt;
   &lt;tr valign="bottom" style="background: #cceeff"&gt;
       &lt;td&gt;
   &lt;div style="margin-left:15px; text-indent:-15px"&gt;Property plant and equipment, net of
   accumulated depreciation
   &lt;/div&gt;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="left"&gt;$&lt;/td&gt;
       &lt;td align="right"&gt;136&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="left"&gt;$&lt;/td&gt;
       &lt;td align="right"&gt;138&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr valign="bottom"&gt;
       &lt;td&gt;
   &lt;div style="margin-left:15px; text-indent:-15px"&gt;Long-term debt including current maturities
   &lt;/div&gt;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="right"&gt;126&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="right"&gt;126&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr valign="bottom" style="background: #cceeff"&gt;
       &lt;td&gt;
   &lt;div style="margin-left:15px; text-indent:-15px"&gt;Equity- Noncontrolling interests
   &lt;/div&gt;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="right"&gt;97&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
       &lt;td align="right"&gt;91&lt;/td&gt;
       &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;!-- End Table Body --&gt;
   &lt;/table&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"&gt;For regulatory ratemaking purposes the agreements continue to be treated as operating leases
   and, as a result, we have recorded a regulatory asset of $33&amp;#160;million as of March&amp;#160;31, 2011 and
   December&amp;#160;31, 2010.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"&gt;APS is exposed to losses relating to these lessor trust VIEs upon the occurrence of certain
   events that APS does not consider to be reasonably likely to occur. Under certain circumstances
   (for example, the United States Nuclear Regulatory Commission (&amp;#8220;NRC&amp;#8221;) issuing specified violation
   orders with respect to Palo Verde or the occurrence of specified nuclear events), APS would be
   required to make specified payments to the VIEs&amp;#8217; noncontrolling equity participants, assume the
   VIEs&amp;#8217; debt, and take title to the leased Unit 2 interests, which, if appropriate, may be required
   to be written down in value. If such an event had occurred as of March&amp;#160;31, 2011, APS would have
   been required to pay the noncontrolling equity participants approximately $146&amp;#160;million and assume
   $126&amp;#160;million of debt. Since APS consolidates the VIEs, the debt APS would be required to assume is
   already reflected in our Condensed Consolidated Balance Sheets.
   &lt;/div&gt;
   &lt;/div&gt;
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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 140
 -Paragraph 35

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 46R
 -Paragraph 2, 14, 15, 16, 23, 24, 25, 26

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 46R
 -Paragraph 4
 -Subparagraph g

Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Staff Position (FSP)
 -Number FAS140-4 and FIN46(R)-8
 -Paragraph C4
 -Subparagraph d

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