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<DATE-OF-FILING-DATE-CHANGE>20100813
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<CONFORMED-NAME>DUNCAN R FOSTER
<CIK>0001196663
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<FILE-NUMBER>001-34691
<FILM-NUMBER>101016537
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    <periodOfReport>2010-07-22</periodOfReport>

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    <remarks>Exhibit List: Exhibit 24 - Power of Attorney</remarks>

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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit&nbsp;24</font></b></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">POWER OF ATTORNEY</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">KNOW
ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints
Barry Welch, Patrick Welch and John Hulburt the true and lawful
attorneys-in-fact and agents, with full power of substitution and resubstitution,
for the undersigned and in the undersigned&#146;s name, place and stead, in any and
all capacities (until revoked in writing) to execute for and on behalf of the
undersigned, in any and all of the undersigned&#146;s capacities, any and all
statements on Forms 3, 4 and 5 with respect to the undersigned&#146;s holdings of
and transactions in securities issued by Atlantic Power Corporation (the &#147;Company&#148;)
in accordance with Sections 16(a)&nbsp;of the Securities Exchange Act of 1934,
as amended (the &#147;Exchange Act&#148;), and any and all regulations promulgated
thereunder, and to file the same, with all exhibits thereto, and any other
documents in connection therewith, with the Securities and Exchange Commission,
and with any other entity when and if such is mandated by the Exchange Act or
by the By-laws of the National Association of Securities Dealers, granting unto
said attorneys-in-fact and agents full power and authority to do and perform
each and every act and thing requisite and necessary fully to all intents and
purposes as the undersigned might or could do in person thereby ratifying and
confirming all that said attorneys-in-fact and agents, or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This
Power of Attorney shall remain in full force and effect until the undersigned
is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&#146;s
holdings of and transactions in securities issued by the Company, unless
earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">IN
WITNESS WHEREOF, this Power of Attorney has been signed as of July&nbsp;22,
2010.</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="9%" valign="top" style="padding:0in 0in 0in 0in;width:9.16%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Signature:</font></p>
  </td>
  <td width="41%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:41.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/
  Richard Foster Duncan</font></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="9%" valign="top" style="padding:0in 0in 0in 0in;width:9.16%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="41%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:41.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="9%" valign="top" style="padding:0in 0in 0in 0in;width:9.16%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>
  </td>
  <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Richard
  Foster Duncan</font></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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