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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>As filed with the Securities and Exchange Commission on August 14, 2006</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:6.0pt'><font size=1>&nbsp;</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=2>Registration No. 333-68042  </font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>UNITED STATES</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>SECURITIES AND EXCHANGE COMMISSION</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Washington, D.C. 20549</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>FORM S-8</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>REGISTRATION STATEMENT</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>UNDER THE SECURITIES ACT OF 1933</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=5>AQUILA, INC.</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>(Exact name of registrant as specified in its charter)</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Delaware</font></b></p> </td>
        <td width="144" valign=top style='border-bottom:solid black 1.0pt; padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><b><font size=2>44-0541877</font></b></p> </td> </tr>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(State or other</font></p> </td>
        <td width="144" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>(IRS Employer</font></p> </td> </tr>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Jurisdiction of</font></p> </td>
        <td width="144" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Identification</font></p> </td> </tr>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Incorporation)</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>No.)</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>20 West Ninth Street</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>Kansas City, Missouri  64105</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:center;'><font size=2>(Address of registrant&#146;s Principal Executive Offices)</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>AQUILA, INC.</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>AQUILA, INC. RETIREMENT INVESTMENT PLAN</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>(Full title of the plan)</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Brad L. Bacon, Esq.</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Assistant General Counsel</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>and Assistant Secretary</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Aquila, Inc. </font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>20 West Ninth Street </font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Kansas City, Missouri 64105 </font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>(816) 421-6600 </font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>(Name and address and telephone number, including area code, of agent for service)</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Copy to:</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>Steven F. Carman, Esq.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>Blackwell Sanders Peper Martin LLP</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>4801 Main Street, Suite 1000</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>Kansas City, Missouri  64112</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>(816) 983-8000</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>CALCULATION OF REGISTRATION FEE</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><br> <font size=2>Title of securities to be registered</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><br> <font size=2>Amount to be registered (1)</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Proposed maximum</font><br> <font size=2>offering price per share (2)</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Proposed maximum</font><br> <font size=2>aggregate offering price (2)</font></p> </td>
        <td width="96" valign=top style='border:solid black 1.0pt;border-color:gray; border-left:none; padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><br> <font size=2>Amount of registration fee</font></p> </td> </tr>
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            <p style='margin-left:0in;text-indent:0pt;text-align:left;margin-top:3.0pt;margin-bottom: 3.0pt'><font size=2>Common Stock, par value $1.00 per share</font></p> </td>
        <td width="114" valign=top style='border-top:none;border-left: none;border-bottom:solid black 1.0pt;border-right:solid black 1.0pt;  padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0in;text-indent:3.75pt;text-align:center;margin-top:3.0pt;margin-bottom:3.0pt'><font size=2>2,000,000 shares  </font></p> </td>
        <td width="108" valign=top style='border-top:none;border-left: none;border-bottom:solid black 1.0pt;border-right:solid black 1.0pt;  padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0in;text-indent:0pt;text-align:center;margin-top:3.0pt;margin-bottom:3.0pt'><font size=2>$ 4.285</font></p> </td>
        <td width="108" valign=top style='border-top:none;border-left: none;border-bottom:solid black 1.0pt;border-right:solid black 1.0pt;  padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0in;text-indent:0pt;text-align:center;margin-top:3.0pt;margin-bottom:3.0pt'><font size=2>$ 8,570,000</font></p> </td>
        <td width="96" valign=top style='border-top:none;border-left:none; border-bottom:solid black 1.0pt;border-right:solid black 1.0pt; padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0in;text-indent:0pt;text-align:center;margin-top:3.0pt;margin-bottom:3.0pt'><font size=2>$ 917</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:justify;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>(1)</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Pursuant to Rule 416(c) under the Securities Act of 1933, this registration statement also covers an indeterminate amount of interests to be offered or sold pursuant to the employee benefit plan described herein.  In addition, includes a preference stock purchase right attached to each share of common stock that, prior to the occurrence of certain events, will not be evidenced separately from the common stock.  Also includes shares issued as a result of a stock split or stock dividend or other anti-dilution provision.</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>(2)</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h) under the Securities Act of 1933, based on the average of the high and low prices of the Registrant&#146;s Common Stock as listed on the New York Stock Exchange composite tape on August 9, 2006.</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>EXPLANATORY NOTE</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:justify;'><font size=2>The purpose of this Registration Statement on Form S-8 (the &#147;Registration Statement&#148;) is to register 2,000,000 additional shares of Common Stock, par value $1.00 per share, of Aquila, Inc. (the &#147;Company&#148;), issuable pursuant to the Company&#146;s Retirement Investment Plan.  In accordance with General Instruction E on Form S-8, the contents of the Registration Statement on Form S-8 (No. 333-68042) are incorporated by reference.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Part II</font></b></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></B></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Item 3:</font></b></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Incorporation of Documents by Reference</font></b></p> </td> </tr></table>


<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>The following documents filed with the Securities and Exchange Commission by the Company are incorporated in this Registration Statement by reference:</font></p>


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            <p  style='text-indent:0in'><font size=1>&nbsp;</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>1.</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>The Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005;</font></p> </td> </tr></table>



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            <p  style='text-indent:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>2.</font></p> </td>
        <td  valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>The Company&#146;s Quarterly Report on Form 10-Q for the quarters ended March 31, 2006 and June 30, 2006;</font></p> </td> </tr></table>



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            <p  style='text-indent:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>3.</font></p> </td>
        <td  valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>The Company&#146;s Reports on Form 8-K filed on January 6, 2006 (two filed), January 23, 2006, March 6, 2006, March 7, 2006, May 3, 2006, June 15, 2006, June 19, 2006, June 29, 2006, July 7, 2006, July 18, 2006 (Form 8-K/A to June 29, 2006 Form 8-K), and August 3, 2006; and</font></p> </td> </tr></table>



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            <p  style='text-indent:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.</font></p> </td>
        <td  valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>The Annual Report on Form 11-K of the Company&#146;s Retirement Investment Plan for the fiscal year ended December 31, 2005.</font></p> </td> </tr></table>


<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>All documents subsequently filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to the filing of a post-effective amendment indicating that all securities offered hereunder have been sold or deregistering all of the securities offered then remaining unsold, shall be deemed to be incorporated herein by reference and to be a part hereof from the date of filing of such documents.</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Item 8:</font></b></p> </td>
        <td  valign=top style='padding:0in 0in 12.0pt 0in'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Exhibits</font></b></p> </td> </tr></table>



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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.1</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Restated Certificate of Incorporation, as amended (incorporated by reference to Exhibit 3(a) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.2</font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Amended and Restated Bylaws (incorporated by reference to Exhibit 3(b) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="100%" style='border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.3</font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Amendment to the Rights Agreement, dated as of March 15, 2002, between the Company and UMB Bank, N.A. (as successor to First Chicago Trust Company of New York), as Rights Agent (incorporated by reference to Exhibit 4(c) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="303" style='border-collapse:collapse'>
    <tr >
        <td width="48" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>5.1</font></p> </td>
        <td width="207" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Opinion of Brad L. Bacon, Esq.</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="453" style='border-collapse:collapse'>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>23.1</font></p> </td>
        <td width="357" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Consent of Brad L. Bacon, Esq. (included in Exhibit 5.1).</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table width="600" border="0" cellspacing=0 cellpadding=0 style='border-collapse:collapse'>
    <tr >
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="593" style='border-collapse:collapse'>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>23.2</font></p> </td>
        <td width="495" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Consent of KPMG LLP, Kansas City, Missouri, independent public accountants.</font></p> </td>
        <td  width="3">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>24.1</font></p> </td>
        <td  nowrap colspan="2" valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Power of Attorney (included in the signature page to the Registration Statement).</font></p> </td> </tr></table>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.78in; text-indent:-0.78in;text-align:justify;'><b><font size=2>Item 9: Undertakings</font></b></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>The undersigned Company hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the Company&#146;s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan&#146;s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Company pursuant to the foregoing provisions, or otherwise, the Company has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Company of expenses incurred or paid by a director, officer or controlling person of the Company in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Company will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit
to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table width="600" border="0" cellspacing=0 cellpadding=0 style='border-collapse:collapse'>
    <tr >
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:center;'>
<B><font SIZE=2>SIGNATURES</font></B></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:justify;'><font size=2>Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Kansas City, State of Missouri, on August 2, 2006.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in;text-align:justify;'><font SIZE=2>AQUILA, INC.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in;text-align:justify;'><font size=2>By:</font><u><font size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Richard C. Green&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:justify;'><font size=2>Richard C. Green</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:justify;'><font size=2>President, Chief Executive Officer and</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:justify;'><font size=2>Chairman of the Board of Directors</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:justify;'><font size=2>The undersigned persons in the capacities indicated appoint Richard C. Green and Christopher M. Reitz, our true and lawful attorneys with power to each of them to sign for us this registration statement and any and all amendments to this registration statement, and generally do all such things in our names and in our capacities to enable Aquila, Inc. to comply with the provisions of the Securities Act of 1933 and all requirements of the Securities and Exchange Commission in connection with this offering.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:justify;'><font size=2>Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities indicated, on August 2, 2006:</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="546" style='margin-left:6.0pt;border-collapse:collapse'>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><u><font size=2>Signature</font></u><u></u></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><u><font size=2>Title</font></u><u></u></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:12.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in;text-indent: 6.0pt;page-break-after:auto'><u><font size=2>/s/ Richard C. Green&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Richard C. Green</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in; '><font size=2>President, Chief Executive Officer and Chairman of the Board of Directors (Principal Executive Officer)</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in; '><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in;text-indent: 6.0pt;page-break-after:auto'><u><font size=2>/s/ Beth A. Armstrong&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Beth A. Armstrong</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in; '><font size=2>Chief Accounting Officer</font></p>
<p  style='margin-bottom:0in; '><font size=2>(Principal Financial and Accounting Officer)</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in;page-break-after: auto'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p  style='margin-bottom:0in; '><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:6.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>/s/ Irvine O. Hockaday&nbsp;&nbsp;, Jr.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Irvine O. Hockaday, Jr.</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Director</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:6.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>/s/ Heidi E. Hutter&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Heidi E. Hutter</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Director</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:6.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>/s/ Stanley O. Ikenberry&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Stanley O. Ikenberry</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Director</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:6.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>/s/ Patrick J. Lynch.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Patrick J. Lynch</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Director</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:6.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><font size=2>/s/ Nicholas J. Singer&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Nicholas J. Singer</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=2>Director</font></p> </td> </tr>
    <tr style='page-break-inside:avoid'>
        <td width="210" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="336" valign=top style='padding:0in 6.0pt 0in 6.0pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table width="600" border="0" cellspacing=0 cellpadding=0 style='border-collapse:collapse'>
    <tr >
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:justify;'><font size=2>Pursuant to the requirements of the Securities Act of 1933, the Compensation and Benefits Committee has duly caused and authorized this registration statement to be signed by the undersigned, hereto duly authorized, in the City of Kansas City, State of Missouri, on August 2, 2006.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="547" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="211" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AQUILA, INC. RETIREMENT</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in; text-indent:0.5in;text-align:left;'><font SIZE=2>INVESTMENT PLAN</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in; text-indent:0.5in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in; text-indent:0.5in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3in; text-indent:0.5in;text-align:left;'><font size=2>By:</font><u><font size=2>  /s/ &nbsp;&nbsp;Irvine O. Hockaday, Jr.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><font size=2>Name: Irvine O Hockaday, Jr., on behalf of the Compensation and Benefits Committee of the Board of Directors</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table width="600" border="0" cellspacing=0 cellpadding=0 style='border-collapse:collapse'>
    <tr >
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'>
<B><font SIZE=2>AQUILA, INC.</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>INDEX TO EXHIBITS</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="181" style='border-collapse:collapse'>
    <tr >
        <td width="19" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="67" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Exhibit</font></b></p> </td>
        <td   colspan="2">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td width="19" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td  nowrap colspan="2" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><b><font size=2>Number</font></b></u></p> </td>
        <td width="85" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><b><font size=2>Document</font></b></u></p> </td> </tr>
    <tr>
        <td width="19" ></td>

        <td width="67" ></td>

        <td width="11" ></td>

        <td width="85" ></td> </tr> </table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="100%" style='border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.1</font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Restated Certificate of Incorporation, as amended (incorporated by reference to Exhibit 3(a) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="100%" style='border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.2</font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Amended and Restated Bylaws (incorporated by reference to Exhibit 3(b) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="100%" style='border-collapse:collapse'>
    <tr >
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>4.3</font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Amendment to the Rights Agreement, dated as of March 15, 2002, between the Company and UMB Bank, N.A. (as successor to First Chicago Trust Company of New York), as Rights Agent (incorporated by reference to Exhibit 4(c) to the Company&#146;s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).</font></p> </td> </tr></table>


<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:1in; text-indent:-0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="303" style='border-collapse:collapse'>
    <tr >
        <td width="48" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>5.1</font></p> </td>
        <td width="207" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Opinion of Brad L. Bacon, Esq.</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="593" style='border-collapse:collapse'>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>23.1</font></p> </td>
        <td width="357" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Consent of Brad L. Bacon, Esq. (included in Exhibit 5.1).</font></p> </td>
        <td   colspan="2">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>23.2</font></p> </td>
        <td  nowrap colspan="2" valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Consent of KPMG LLP, Kansas City, Missouri, independent public accountants.</font></p> </td>
        <td  width="3">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
    <tr >
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:12.0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>24.1</font></p> </td>
        <td  nowrap colspan="3" valign=top style='padding:0in 0in 12.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:justify;margin-top:0pt;margin-bottom:0pt'><font size=2>Power of Attorney (included in the signature page to the Registration Statement).</font></p> </td> </tr>
    <tr>
        <td width="48" ></td>

        <td width="48" ></td>

        <td width="357" ></td>

        <td width="137" ></td>

        <td width="3" ></td> </tr> </table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:0.5in;text-align:justify;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table width="600" border="0" cellspacing=0 cellpadding=0 style='border-collapse:collapse'>
    <tr >
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
        <td width="213" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:right;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=1>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


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[{"type": "S-8", "sequence": "1", "filename": "as8_081406.htm", "description": "FORM S-8 081406", "secsgml_size_bytes": 58730}]
{"company-data": {"conformed-name": "AQUILA  INC", "cik": "0000066960", "assigned-sic": "4911", "irs-number": "440541877", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-136635", "film-number": "061033255"}, "business-address": {"street1": "20 WEST NINTH STREET", "street2": "--", "city": "KANSAS CITY", "state": "MO", "zip": "64105-1711", "phone": "8164216600"}, "mail-address": {"street1": "20 WEST NINTH STREET", "city": "KANSAS CITY", "state": "MO", "zip": "64105-1711"}, "former-company": [{"former-conformed-name": "UTILICORP UNITED INC", "date-changed": "19920703"}, {"former-conformed-name": "MISSOURI PUBLIC SERVICE CO", "date-changed": "19850516"}]}
As filed with the Securities and Exchange Commission on August 14, 2006
Registration No. 333-68042
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933
AQUILA, INC.
(Exact name of registrant as specified in its charter)
Delaware
44-0541877
(State or other
(IRS Employer
Jurisdiction of
Identification
Incorporation)
No.)
20 West Ninth Street
Kansas City, Missouri  64105
(Address of registrant's Principal Executive Offices)
AQUILA, INC.
AQUILA, INC. RETIREMENT INVESTMENT PLAN
(Full title of the plan)
Brad L. Bacon, Esq.
Assistant General Counsel
and Assistant Secretary
Aquila, Inc.
20 West Ninth Street
Kansas City, Missouri 64105
(816) 421-6600
(Name and address and telephone number, including area code, of agent for service)
Copy to:
Steven F. Carman, Esq.
Blackwell Sanders Peper Martin LLP
4801 Main Street, Suite 1000
Kansas City, Missouri  64112
(816) 983-8000
CALCULATION OF REGISTRATION FEE
Title of securities to be registered
Amount to be registered (1)
Proposed maximum
offering price per share (2)
Proposed maximum
aggregate offering price (2)
Amount of registration fee
Common Stock, par value $1.00 per share
2,000,000 shares
$ 4.285
$ 8,570,000
$ 917
(1)
Pursuant to Rule 416(c) under the Securities Act of 1933, this registration statement also covers an indeterminate amount of interests to be offered or sold pursuant to the employee benefit plan described herein.  In addition, includes a preference stock purchase right attached to each share of common stock that, prior to the occurrence of certain events, will not be evidenced separately from the common stock.  Also includes shares issued as a result of a stock split or stock dividend or other anti-dilution provision.
(2)
Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h) under the Securities Act of 1933, based on the average of the high and low prices of the Registrant's Common Stock as listed on the New York Stock Exchange composite tape on August 9, 2006.
EXPLANATORY NOTE
The purpose of this Registration Statement on Form S-8 (the "Registration Statement") is to register 2,000,000 additional shares of Common Stock, par value $1.00 per share, of Aquila, Inc. (the "Company"), issuable pursuant to the Company's Retirement Investment Plan.  In accordance with General Instruction E on Form S-8, the contents of the Registration Statement on Form S-8 (No. 333-68042) are incorporated by reference.
Part II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3:
Incorporation of Documents by Reference
The following documents filed with the Securities and Exchange Commission by the Company are incorporated in this Registration Statement by reference:
1.
The Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005;
2.
The Company's Quarterly Report on Form 10-Q for the quarters ended March 31, 2006 and June 30, 2006;
3.
The Company's Reports on Form 8-K filed on January 6, 2006 (two filed), January 23, 2006, March 6, 2006, March 7, 2006, May 3, 2006, June 15, 2006, June 19, 2006, June 29, 2006, July 7, 2006, July 18, 2006 (Form 8-K/A to June 29, 2006 Form 8-K), and August 3, 2006; and
4.
The Annual Report on Form 11-K of the Company's Retirement Investment Plan for the fiscal year ended December 31, 2005.
All documents subsequently filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to the filing of a post-effective amendment indicating that all securities offered hereunder have been sold or deregistering all of the securities offered then remaining unsold, shall be deemed to be incorporated herein by reference and to be a part hereof from the date of filing of such documents.
Item 8:
Exhibits
4.1
Restated Certificate of Incorporation, as amended (incorporated by reference to Exhibit 3(a) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
4.2
Amended and Restated Bylaws (incorporated by reference to Exhibit 3(b) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
4.3
Amendment to the Rights Agreement, dated as of March 15, 2002, between the Company and UMB Bank, N.A. (as successor to First Chicago Trust Company of New York), as Rights Agent (incorporated by reference to Exhibit 4(c) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
5.1
Opinion of Brad L. Bacon, Esq.
23.1
Consent of Brad L. Bacon, Esq. (included in Exhibit 5.1).
23.2
Consent of KPMG LLP, Kansas City, Missouri, independent public accountants.
24.1
Power of Attorney (included in the signature page to the Registration Statement).
Item 9: Undertakings
The undersigned Company hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the Company's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Company pursuant to the foregoing provisions, or otherwise, the Company has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Company of expenses incurred or paid by a director, officer or controlling person of the Company in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Company will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit
to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Kansas City, State of Missouri, on August 2, 2006.
AQUILA, INC.
By:
/s/ Richard C. Green
Richard C. Green
President, Chief Executive Officer and
Chairman of the Board of Directors
The undersigned persons in the capacities indicated appoint Richard C. Green and Christopher M. Reitz, our true and lawful attorneys with power to each of them to sign for us this registration statement and any and all amendments to this registration statement, and generally do all such things in our names and in our capacities to enable Aquila, Inc. to comply with the provisions of the Securities Act of 1933 and all requirements of the Securities and Exchange Commission in connection with this offering.
Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities indicated, on August 2, 2006:
Signature
Title
/s/ Richard C. Green
Richard C. Green
President, Chief Executive Officer and Chairman of the Board of Directors (Principal Executive Officer)
/s/ Beth A. Armstrong
Beth A. Armstrong
Chief Accounting Officer
(Principal Financial and Accounting Officer)
/s/ Irvine O. Hockaday  , Jr.
Irvine O. Hockaday, Jr.
Director
/s/ Heidi E. Hutter
Heidi E. Hutter
Director
/s/ Stanley O. Ikenberry
Stanley O. Ikenberry
Director
/s/ Patrick J. Lynch.
Patrick J. Lynch
Director
/s/ Nicholas J. Singer
Nicholas J. Singer
Director
Pursuant to the requirements of the Securities Act of 1933, the Compensation and Benefits Committee has duly caused and authorized this registration statement to be signed by the undersigned, hereto duly authorized, in the City of Kansas City, State of Missouri, on August 2, 2006.
AQUILA, INC. RETIREMENT
INVESTMENT PLAN
By:
/s/   Irvine O. Hockaday, Jr.
Name: Irvine O Hockaday, Jr., on behalf of the Compensation and Benefits Committee of the Board of Directors
AQUILA, INC.
INDEX TO EXHIBITS
Exhibit
Number
Document
4.1
Restated Certificate of Incorporation, as amended (incorporated by reference to Exhibit 3(a) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
4.2
Amended and Restated Bylaws (incorporated by reference to Exhibit 3(b) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
4.3
Amendment to the Rights Agreement, dated as of March 15, 2002, between the Company and UMB Bank, N.A. (as successor to First Chicago Trust Company of New York), as Rights Agent (incorporated by reference to Exhibit 4(c) to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2005).
5.1
Opinion of Brad L. Bacon, Esq.
23.1
Consent of Brad L. Bacon, Esq. (included in Exhibit 5.1).
23.2
Consent of KPMG LLP, Kansas City, Missouri, independent public accountants.
24.1
Power of Attorney (included in the signature page to the Registration Statement).