<SUBMISSION>
<ACCESSION-NUMBER>0001130464-08-000356
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>3
<PERIOD>20081218
<ITEMS>1.01
<ITEMS>2.03
<ITEMS>7.01
<ITEMS>9.01
<FILING-DATE>20081219
<DATE-OF-FILING-DATE-CHANGE>20081218
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>BLACK HILLS CORP /SD/
<CIK>0001130464
<ASSIGNED-SIC>4911
<IRS-NUMBER>460458824
<STATE-OF-INCORPORATION>SD
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-31303
<FILM-NUMBER>081258468
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>625 9TH STREET
<STREET2>PO BOX 1400
<CITY>RAPID CITY
<STATE>SD
<ZIP>57709
<PHONE>6057212343
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>625 9TH STREET
<STREET2>PO BOX 1400
<CITY>RAPID
<STATE>SD
<ZIP>57709
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>BLACK HILLS HOLDING CORP
<DATE-CHANGED>20001222
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>bhcform8k121808.htm
<TEXT>
<HTML>
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<TITLE> </TITLE>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;border-bottom:solid 2.25pt;padding-bottom:1;'>&nbsp;</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=5>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=5>UNITED STATES</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=5>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;'><b><font size=3>___________</font></b></p>

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

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=5>FORM 8-K</font></B></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=3>____________</font></b></p>

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

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

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>PURSUANT TO SECTION 13 OR 15(d) OF THE</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>SECURITIES EXCHANGE ACT OF 1934</font></B></p>

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

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=2>Date of Report (Date of earliest event reported) December 18, 2008</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=3>____________</font></b></p>

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

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=5>BLACK HILLS CORPORATION</font></B></p>

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

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=3>____________</font></b></p>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="600" style='margin-left:23.4pt;border-collapse:collapse'>
    <tr >
        <td  colspan="5" 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'><b><font size=2>South Dakota</font></b></p> </td> </tr>
    <tr >
        <td  colspan="5" 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'><b><font size=2>(State or other jurisdiction of incorporation)</font></b></p> </td> </tr>
    <tr >
        <td  colspan="2" 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'><b><font size=2>001-31303</font></b></p> </td>
        <td width="204" 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  colspan="2" 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'><b><font size=2>46-0458824</font></b></p> </td> </tr>
    <tr >
        <td  colspan="2" 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'><b><font size=2>(Commission File Number)</font></b></p> </td>
        <td width="204" 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  colspan="2" 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'><b><font size=2>(IRS Employer Identification No.)</font></b></p> </td> </tr>
    <tr >
        <td  colspan="2" 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="204" 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  colspan="2" 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> </tr>
    <tr >
        <td  colspan="3" rowspan=3 valign=top style='padding:0in 5.4pt 0in 5.4pt'>
            <p style='margin-left:0pt;text-indent:6.75pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>625 Ninth Street, PO Box 1400 </font></b></p>
<p style='margin-left:12.6pt;text-indent:4.5pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Rapid City, South Dakota</font></b></p>
<p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>(Address of principal executive offices)</font></b></p> </td>
        <td  colspan="2" 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'><b><font size=2>57709-1400</font></b></p> </td> </tr>
    <tr style='height:10.9pt'>
        <td  colspan="2" valign=top style='padding:0in 5.4pt 0in 5.4pt; height:10.9pt'>
            <p style='margin-left:0pt;text-indent:0pt;text-align:center;margin-top:0pt;margin-bottom:0pt'><b><font size=2>(Zip Code)</font></b></p> </td> </tr>
    <tr style='height:10.85pt'>
        <td  colspan="2" valign=top style='padding:0in 5.4pt 0in 5.4pt; height:10.85pt'>
            <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 >
        <td  colspan="5" 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'><b><font size=2>605.721.1700</font></b></p> </td> </tr>
    <tr >
        <td  colspan="5" 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'><b><font size=2>(Registrant&#146;s telephone number, including area code)</font></b></p> </td> </tr>
    <tr >
        <td width="162" 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  colspan="3" 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="192" 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> </tr>
    <tr >
        <td  colspan="5" 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'><b><font size=2>Not Applicable</font></b></p> </td> </tr>
    <tr >
        <td  colspan="5" 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'><b><font size=2>(Former name or former address, if changed since last report)</font></b></p> </td> </tr>
    <tr>
        <td width="162" ></td>

        <td width="18" ></td>

        <td width="204" ></td>

        <td width="24" ></td>

        <td width="192" ></td> </tr> </table>
            </div>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><b><font size=3>____________</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-indent:0.5in;text-align:left;'><b><font size=2>Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (</font></b><i><b><font size=2>see</font></b></i><b><font size=2> General Instruction A.2. below):</font></b></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;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'><b><font size=2>&#144;</font></b></p> </td>
        <td width="666" 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'><b><font size=2>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></b></p>
<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>
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        <td width="18" 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'><b><font size=2>&#144;</font></b></p> </td>
        <td width="666" 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'><b><font size=2>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></b></p>
<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>
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        <td width="18" 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'><b><font size=2>&#144;</font></b></p> </td>
        <td width="666" 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'><b><font size=2>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></b></p>
<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>
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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>&#144;</font></b></p> </td>
        <td width="666" 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'><b><font size=2>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></b></p>
<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>
</div>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;border-bottom:solid 2.25pt;padding-bottom:1;'><font size=5>&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-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

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<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'><b><font size=2>Item 1.01</font></b></p> </td>
        <td width="316" nowrap valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Entry into a Material Definitive Agreement</font></b></p> </td> </tr></table>
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<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:left;'><font size=2>On December 18, 2008, the Registrant entered into a Second Amendment to the Credit Agreement dated May 7, 2007 among Black Hills Corporation as Borrower, ABN AMRO Bank N.V., as Administrative Agent, Sole Bookrunner and Co-Arranger, BMO Capital Markets, as Syndication Agent and Co-Arranger, Credit Suisse Securities (USA) LLC, as Syndication Agent and Co-Arranger, and the Financial Institutions party thereto, as Banks (the &#147;BHC Credit Agreement&#148;).  </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt;text-align:left;'><font size=2>The Second Amendment to the BHC Credit Agreement extended the $383 million bridge acquisition facility from the original termination date of February 5, 2009 to December 29, 2009 (the &#147;Bridge Extension&#148;).  Fees paid at closing totaled approximately $5 million.  The cost of borrowings under the Eurodollar provision of the facility is as follows:</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="24" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>300 basis points over LIBOR through March 31, 2009, </font></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="24" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>350 basis points over LIBOR from April 1, 2009 through June 30, 2009,</font></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="24" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>400 basis points over LIBOR from July 1, 2009 through September 30, 2009, and</font></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0in'><font size=1>&nbsp;</font></p> </td>
        <td width="24" valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=4><b>&#149;</b></font></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>450 basis points over LIBOR thereafter. </font></p> </td> </tr></table>
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<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>The initial borrowing rate is 5.8 percent.  The Bridge Extension also allows for the transfer of Administrative Agent from ABN AMRO Bank N.V. to The Royal Bank of Scotland PLC.</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>The BHC Credit Agreement, filed as Exhibit 10.3 to the Registrant&#146;s Form 10-Q for the quarterly period ended June 30, 2007; the First Amendment to the BHC Credit Agreement, filed as Exhibit 10.2 to the Registrant&#146;s Form 8-K filed July 14, 2008; and the Second Amendment to the BHC Credit Agreement, filed as Exhibit 10 to this Form 8-K; are each incorporated herein by reference. </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'><b><font size=2>Item 2.03 </font></b></p> </td>
        <td  valign=top >
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><b><font size=2>Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant</font></b></p> </td> </tr></table>
</div>


<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>The information required by this item is included in Item 1.01.</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'><b><font size=2>Item 7.01</font></b></p> </td>
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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>Regulation FD Disclosure</font></b></p> </td> </tr></table>
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<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>On December 18, 2008, the Registrant issued a press release announcing the Bridge Extension.  </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>The press release is attached as Exhibit 99 to this Form 8-K.  This information contained in this Item 7.01 is not filed for purposes of the Securities Exchange Act of 1934, as amended, and is not deemed incorporated by reference in any filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except to the extent the Registrant specifically incorporates the information by reference.</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-bottom:0pt; margin-top:0pt;text-align:center;'><A NAME="PAGENUM"><font size=2>2</font>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

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<b><font size=2>Item 9.01 </font></b><font size=1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><b><font size=2>Financial Statements and Exhibits</font></b></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>(c)</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>Exhibits</font></p> </td> </tr></table>
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<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>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>10</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>Second Amendment to the Credit Agreement dated May 7, 2007 among Black Hills Corporation, as Borrower, ABN AMRO Bank N.V., in its capacity as agent for the Banks under the Credit Agreement, and as a Bank, and the other Banks party thereto.</font></p> </td> </tr></table>
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<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>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>99</font></p> </td>
        <td width="275" nowrap valign=top style='padding:5.0pt 0in 5.0pt 0in; '>
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Press release dated December 18, 2008.</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><A NAME="PAGENUM"><font size=2>3</font>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

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

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.51in;text-align:left;'><font size=2>Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</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>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>BLACK HILLS CORPORATION</font></p> </td> </tr>
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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>
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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> </tr>
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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>
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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> </tr>
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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>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By:&nbsp;</font><u><font size=2>/s/ Anthony S. Cleberg</font></u>                                                                                                          </p> </td> </tr>
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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>
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            <p style='margin-left:0pt;text-indent:21.0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Anthony S. Cleberg</font></p> </td> </tr>
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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>
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            <p style='margin-left:0pt;text-indent:21.75pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Executive Vice President</font></p> </td> </tr>
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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>
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            <p style='margin-left:0pt;text-indent:26.25pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>and Chief Financial Officer</font></p> </td> </tr>
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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>
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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> </tr>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date:&nbsp;&nbsp;December 18, 2008</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=1>&nbsp;</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><A NAME="PAGENUM"><font size=2>4</font>
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<b><font size=2>Exhibit Index</font></b></p>

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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><u><b><font size=2>Description</font></b></u></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Second Amendment to the Credit Agreement dated May 7, 2007 among Black Hills Corporation, as Borrower, ABN AMRO Bank N.V., in its capacity as agent for the Banks under the Credit Agreement, and as a Bank, and the other Banks party thereto.</font></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>99</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>Press release dated December 18, 2008.</font></p> </td> </tr></table>
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<p style=' margin-bottom:12pt; margin-top:0pt;text-align:center;'><U><B><font SIZE=2>SECOND AMENDMENT TO THE CREDIT AGREEMENT</font></B></U></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><B><font SIZE=2>THIS SECOND AMENDMENT TO THE CREDIT AGREEMENT </font></B><font size=2>(this &#147;</font><i><font size=2>Amendment</font></i><font size=2>&#148;)</font><b><font size=2> </font></b><font size=2>dated as of December 18, 2008 is by and among Black Hills Corporation, a South Dakota corporation (</font><i><font size=2>&#147;Borrower&#148;</font></i><font size=2>)</font><i><font size=2>, </font></i><font size=2>ABN AMRO Bank N.V., in its capacity as agent for the Banks under the Credit Agreement described below (in such capacity, the </font><i><font size=2>&#147;Administrative Agent&#148;)</font></i><font size=2>, and as a Bank,</font><i><font size=2> </font></i><font size=2>and each of the other Banks.</font></p>

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

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><B><font SIZE=2>WHEREAS</font></B><font size=2>, the Borrower, Administrative Agent and the Banks have entered into that certain Credit Agreement dated as of May 7, 2007 (as the same has been and hereafter may be further amended, modified or restated from time to time, the </font><i><font size=2>&#147;Credit Agreement&#148;</font></i><font size=2>);</font><b><font size=2> </font></b><font size=2>and</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><B><font SIZE=2>WHEREAS, </font></B><font size=2>the Borrower desires to amend certain terms of the Credit Agreement, as set forth below; and</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><B><font SIZE=2>WHEREAS,</font></B><font size=2> the Administrative Agent and each of the Banks are willing, subject to the terms hereof, to so amend the Credit Agreement.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><B><font SIZE=2>NOW, THEREFORE, </font></B><font size=2>in consideration of the recitals set forth above and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereto hereby agree as follows:</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 1.  </font><u><font size=2>Definitions</font></u><font size=2>.  All capitalized terms used but not otherwise defined in this Amendment shall have the meaning ascribed to them in the Credit Agreement.  Unless otherwise specified, all section references herein refer to sections of the Credit Agreement.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 2.  </font><u><font size=2>Amendments to Credit Agreement</font></u><font size=2>.  Effective upon the satisfaction of each of the conditions precedent set forth in </font><u><font size=2>Section 5</font></u><font size=2> below, the Credit Agreement is hereby amended as follows: </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>Section 2.1  </font><font size=1></font><font size=2>The following definition of the term &#147;Extension Date&#148; is hereby added to Section 1.1 of the Credit Agreement in the correct alphabetical order:</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><i><font size=2>&#147;Extension Date&#148; </font></i><font size=2>means December 18, 2008.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>Section 2.2  &nbsp;&nbsp;&nbsp;&nbsp;The definitions of the terms &#147;Base Rate Margin,&#148; &#147;Eurodollar Margin&#148; and  &#147;Termination Date&#148; appearing in Section 1.1 of the Credit Agreement are hereby deleted in their respective entireties and the following language is hereby substituted therefor, respectively:</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><i><font size=2>&#147;Base Rate Margin&#148; </font></i><font size=2>means a per annum rate of interest equal to: </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from the Extension Date through March 31, 2009, two percent (2.00%)  (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Base Rate Margin shall be increased to two and one quarter percent (2.25%)); </font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font SIZE=1>CHI02_60688179_209611_00011 </font></p>
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<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(ii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from April 1, 2009 through June 30, 2009, two and one half percent (2.50%) (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Base Rate Margin shall be increased to two and three quarters percent (2.75%));</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(iii)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from July 1, 2009 through September 30, 2009, three percent (3.00%)  (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Base Rate Margin shall be increased to three and one quarter percent (3.25%)); and</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(iv) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;thereafter,  three and one half percent (3.50%)  (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Base Rate Margin shall be increased to three and three quarters percent (3.75%)).</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><i><font size=2>&#147;Eurodollar Margin&#148; </font></i><font size=2>means a per annum rate of interest equal to: </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from the Extension Date through March 31, 2009, three percent (3.00%) (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Eurodollar Margin shall be increased to three and one quarter percent (3.25%)); </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(ii)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from April 1, 2009 through June 30, 2009, three and one half percent (3.50%) (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Eurodollar Margin shall be increased to three and three quarter percent (3.75%));</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(iii)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;from July 1, 2009 through September 30, 2009, four percent (4.00%) (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Eurodollar Margin shall be increased to four and one quarter percent (4.25%)); and</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>(iv) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;thereafter, four and one half percent (4.50%) (and, in the event and for so long as (x) the S&amp;P Rating of the Borrower is lower than BBB- or (y) the Moody&#146;s Rating of the Borrower is lower than Baa3, such Eurodollar Margin shall be increased to four and three quarters percent (4.75%)). </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><i><font size=2>&#147;Termination Date&#148; </font></i><font size=2>means December 29, 2009.</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:0.5in; text-indent:0.5in;text-align:justify;'><font size=2>Section 2.3  &nbsp;&nbsp;&nbsp;&nbsp;The definition of &#147;Base Rate&#148; appearing in Section 2.3 of the Credit Agreement is hereby deleted in its entirety and the following language is hereby substituted therefor:</font></p>

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<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:1in;text-align:justify;'><i><font size=2>&#147;Base Rate&#148;</font></i><font size=2> means for any day the greatest of:</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:1in; text-indent:0.5in;text-align:justify;'><font size=2>(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the rate of interest announced by ABN AMRO Bank N.V. from time to time as its prime rate, or equivalent, for U.S.  Dollar loans within the United States as in effect on such day, with any change in the Base Rate resulting from a change in said prime rate to be effective as of the date of the relevant change in said prime rate;</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:1in; text-indent:0.5in;text-align:justify;'><font size=2>(ii)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the sum of (x) the Federal Funds Rate, plus (y) one half of one percent (0.50%); and</font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; margin-left:1in; text-indent:0.5in;text-align:justify;'><font size=2>(iii)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the sum of (x) LIBOR, for an Interest Period of three months as it appears on the Applicable Telerate Page as of 11:00 a.m. (London, England time) on the day two (2) Business Days before such day, plus (y) one hundred (100) basis points; </font><u><font size=2>provided</font></u><font size=2>, if no such offered rate for LIBOR exists or cannot be determined, such rate will be the the arithmetical average of the rates of interest per annum (rounded upwards, if necessary, to the nearest one-sixteenth of one percent) at which deposits in U.S. Dollars, in immediately available funds are offered to the Administrative Agent at 11:00 a.m. (London, England time) two (2) Business Days before such date by major banks in the interbank eurodollar market for delivery on such date and for a period of three (3) months for the applicable
principal amount on such date of determination.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 3.  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><u><font size=2>Consent to Agency Transfer</font></u><font size=2>.&nbsp;The Borrower and each of the Banks hereby (a) acknowledges and consents to the execution and delivery on the Extension Date of the document attached hereto as </font><u><font size=2>Annex A</font></u><font size=2>, pursuant to which, among other things, ABN AMRO Bank N.V. will resign from its role as Administrative Agent and The Royal Bank of Scotland plc will be made the successor thereto in the role of Administrative Agent, (b) agree and acknowledge this </font><u><font size=2>Section 3</font></u><font size=2> will act as the appointment of a successor Administrative Agent with the consent of Borrower, as is required by the terms of Section 10.7 of the Credit Agreement, and (c) acknowledge and consent that following execution and delivery of the document
attached hereto as </font><u><font size=2>Annex A</font></u><font size=2>, The Royal Bank of Scotland plc shall immediately and without any further action or event succeed to and become vested with all the rights and duties of ABN AMRO Bank N.V. under the Credit Documents, and ABN AMRO Bank N.V. shall be discharged from its duties and obligations thereunder and the provisions of Section 10 of the Credit Agreement and all protective provisions of the Credit Documents shall inure to the benefit of ABN AMRO Bank N.V. as to any actions taken or omitted to be taken by it while it was Administrative Agent</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><u><font size=2>Ratification</font></u><font size=2>.  The Borrower hereby ratifies, acknowledges, affirms and reconfirms its rights, interests and obligations under each Credit Document, as amended hereby,  and agrees to perform each of its obligations thereunder as and when required.  By executing this Amendment, the Borrower hereby further ratifies, acknowledges, affirms and reconfirms that each Credit Document, as amended hereby, constitutes a legal, valid and binding obligation of the Borrower enforceable against the Borrower in accordance with its terms, and that each such Credit Document, as amended hereby, is in full force and effect.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 5.  </font><u><font size=2>Conditions</font></u><font size=2>.  The effectiveness of this Amendment is subject to the following conditions precedent:</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:justify;'><font size=2>Section 5.1  The Borrower, the Administrative Agent and each Bank shall have executed and delivered this Amendment, and the Borrower shall have executed and/or delivered such other documents and instruments as Administrative Agent may reasonably require to effectuate the terms of this Amendment.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:justify;'><font size=2>Section 5.2  Borrower shall have paid to the Administrative Agent for the benefit of each of the Banks on or prior to the date hereof, for such Bank&#146;s own account, a fully-earned, non-refundable amendment fee in an amount equal to 1.25% multiplied by such Bank&#146;s Percentage, in immediately available funds.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:justify;'><font size=2>Section&nbsp;&nbsp;5.3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The representations and warranties set forth in </font><u><font size=2>Section 6</font></u><font size=2> of this Amendment shall be true and correct.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:justify;'><font size=2>Section 5.4  All proceedings taken in connection with the transactions contemplated by this Amendment and all documents, instruments and other legal matters incident thereto shall be reasonably satisfactory to the Administrative Agent and its legal counsel.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 6.  </font><u><font size=2>Representations and Warranties</font></u><font size=2>.&nbsp;&nbsp;&nbsp;&nbsp;To induce the Administrative Agent and the Banks to enter into this Amendment, the Borrower represents and warrants to the Administrative Agent and the Banks that (i) the execution, delivery and performance of this Amendment have been duly authorized by all requisite corporate action on the part of the Borrower and that this Amendment has been duly executed and delivered by the Borrower and this Amendment and the Credit Agreement, as amended hereby, constitutes valid and binding obligations of the Borrower enforceable in accordance with its terms, (ii) no Default or Event of Default (after giving effect to this Amendment) has occurred and is continuing under the Credit Agreement or would result from the execution and delivery of this Amendment, and (iii) [except as set forth
in the supplemental Schedules attached hereto,] each of the representations and warranties set forth in </font><u><font size=2>Section 5</font></u><font size=2> of the Credit Agreement, as amended hereby, is true and correct in all material respects as of the date hereof, except that if any such representation or warranty (x) relates solely to an earlier date it need only remain true in all material respects as of such date, or (y) is already qualified by materiality, in which case it shall be true and correct in all respects.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 7.  </font><u><font size=2>Severability</font></u><font size=2>.   Any provision of this Amendment held by a court of competent jurisdiction to be invalid or unenforceable shall not impair or invalidate the remainder of this Amendment and the effect thereof shall be confined to the provision so held to be invalid or unenforceable. </font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 8.  </font><u><font size=2>References</font></u><font size=2>.  Any reference to the Credit Agreement contained in any document, instrument or agreement executed in connection with the Credit Agreement shall be deemed to be a reference to the Credit Agreement as modified by this Amendment.  </font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 9.  </font><u><font size=2>Counterparts</font></u><font size=2>.  This Amendment may be executed in one or more counterparts, each of which shall constitute an original, but all of which taken together shall be one and the same instrument.  This Amendment may also be executed by facsimile or electronic means and each facsimile or electronic signature hereto shall be deemed for all purposes to be an original signatory page.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 10.  </font><u><font size=2>Costs</font></u><font size=2>.  The Borrower agrees to pay on demand all reasonable costs and expenses incurred by the Administrative Agent (including fees and expenses of counsel) incurred in connection with the negotiation and preparation of this Amendment.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section  11.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><u><font size=2>Governing Law</font></u><font size=2>.  The validity and interpretation of this Amendment and the terms and conditions set forth herein, shall be governed by and construed in accordance with the laws of the State of New York, without giving effect to any provisions relating to conflict of laws other than section 5-1401 of the New York General Obligations Laws.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Section 12.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><u><font size=2>Miscellaneous</font></u><font size=2>.  This Amendment shall be deemed to be a Credit Document.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><i><font size=2>- Remainder of page left blank; signature pages follow -</font></i></p>

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<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>In Witness Whereof, the parties hereto have caused this Amendment to be duly executed and delivered in New York, New York by their duly authorized officers as of the day and year first above written.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><B><font SIZE=2>BLACK HILLS CORPORATION</font></B><font size=2>, a South Dakota corporation</font></p>

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            <p  style='text-align:justify'><font size=2>/s/ David R. Emery</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>David R. Emery</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:right;'><font size=2>Second Amendment</font></p>

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<font size=2>In Witness Whereof, the parties hereto have caused this Amendment to be duly executed and delivered in New York, New York by their duly authorized officers as of the day and year first above written.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><b><font size=2>ABN AMRO Bank N.V.</font></b></p>

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            <p  style='text-align:justify'><font size=2>/s/ Allen Broyles</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>/s/ Maria Vanderwarren</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>Maria Vanderwarren</font></p> </td> </tr></table>
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<table border="0" cellspacing=0 cellpadding=0 width="560" style='border-collapse:collapse'>
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            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="176" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Assistant Vice President</font></p> </td> </tr></table>
</div>

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

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><b><font size=2>U.S. Bank National Association</font></b></p>

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


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<table border="0" cellspacing=0 cellpadding=0 width="503" style='border-collapse:collapse'>
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            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="119" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Paul Vastola</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="484" style='border-collapse:collapse'>
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            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="100" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Paul Vastola</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="497" style='border-collapse:collapse'>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="113" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Vice President</font></p> </td> </tr></table>
</div>

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

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><B><font SIZE=2>BAYERISCHE LANDESBANK</font></B></p>

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


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<table border="0" cellspacing=0 cellpadding=0 width="509" style='border-collapse:collapse'>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="125" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ John Gregory</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="491" style='border-collapse:collapse; '>
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            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="107" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>John Gregory</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="531" style='border-collapse:collapse'>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="147" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>First Vice President</font></p> </td> </tr></table>
</div>

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


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<table border="0" cellspacing=0 cellpadding=0 width="563" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="179" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Nikolai von Mengden</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="543" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="159" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Nikolai von Mengden</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="543" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="159" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Senior Vice President</font></p> </td> </tr></table>
</div>

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

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><b><font size=2>BMO Capital Markets Financing, Inc.</font></b></p>

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


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<table border="0" cellspacing=0 cellpadding=0 width="512" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="128" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Ian M. Plester</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="493" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="109" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Ian M. Plester</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="456" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="72" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Director</font></p> </td> </tr></table>
</div>

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

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><B><font SIZE=2>COBANK, ACB</font></B></p>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="508" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="124" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Mathew Brill</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="489" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="105" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Mathew Brill</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="497" style='border-collapse:collapse'>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="113" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Vice President</font></p> </td> </tr></table>
</div>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;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>

<div TITLE="EE+ Page Footer">
<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font SIZE=2></font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:right;'><font size=2>Second Amendment </font></p>
</DIV>

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

<div TITLE="EE+ Page Break" STYLE="PAGE-BREAK-AFTER: always">

<HR noshade align="center" width="100%" size="2">
</DIV>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'>
<font size=2>In Witness Whereof, the parties hereto have caused this Amendment to be duly executed and delivered in New York, New York by their duly authorized officers as of the day and year first above written.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><b><font size=2>Credit Suisse, Cayman Islands Branch</font></b></p>

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


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<table border="0" cellspacing=0 cellpadding=0 width="508" style='border-collapse:collapse; '>
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        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="124" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ James Moran</font></p> </td> </tr></table>
</div>



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<table border="0" cellspacing=0 cellpadding=0 width="489" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="105" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>James Moran</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="525" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="141" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Managing Director</font></p> </td> </tr></table>
</div>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="511" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="127" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Nupur Kumar</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="492" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="108" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Nupur Kumar</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="465" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="81" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Associate</font></p> </td> </tr></table>
</div>

<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; margin-left:3.5in;text-align:left;'><B><font SIZE=2>ROYAL BANK OF SCOTLAND PLC</font></B></p>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="540" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="156" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Andrew N. Taylor</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="521" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="137" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Andrew N. Taylor</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="497" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="113" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Vice President</font></p> </td> </tr></table>
</div>

<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:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><B><font SIZE=2>SCOTIABANC INC.</font></B></p>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="483" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="99" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ J.F. Todd</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="464" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="80" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>J.F. Todd</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="525" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="141" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Managing Director</font></p> </td> </tr></table>
</div>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="515" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="131" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ R. Blackwood</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="495" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="111" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>R. Blackwood</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="456" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="72" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Director</font></p> </td> </tr></table>
</div>

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

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:left;'><b><font size=2>The Bank of Nova Scotia</font></b></p>

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


<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="511" style='border-collapse:collapse'>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
        <td width="127" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>/s/ Thane Rattew</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="492" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
        <td width="108" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Thane Rattew</font></p> </td> </tr></table>
</div>



<div align=left>

<table border="0" cellspacing=0 cellpadding=0 width="525" style='border-collapse:collapse; '>
    <tr >
        <td width="336" nowrap valign=top >
            <p  style='text-align:justify'><font size=1>&nbsp;</font></p> </td>
        <td width="48" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
        <td width="141" nowrap valign=top >
            <p  style='text-align:justify'><font size=2>Managing Director</font></p> </td> </tr></table>
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<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; margin-left:3.5in;text-align:left;'><B><font SIZE=2>UNION BANK OF CALIFORNIA, N.A.</font></B></p>

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            <p  style='text-align:justify'><font size=2>/s/ Robert J. Cole</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
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            <p  style='text-align:justify'><font size=2>Robert J. Cole</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>Title:</font></p> </td>
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            <p  style='text-align:justify'><font size=2>Vice President</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:3.5in;text-align:justify;'><B><font SIZE=2>WELLS FARGO BANK, N.A.</font></B></p>

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            <p  style='text-align:justify'><font size=2>By:</font></p> </td>
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            <p  style='text-align:justify'><font size=2>/s/ William Champion</font></p> </td> </tr></table>
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            <p  style='text-align:justify'><font size=2>Name:</font></p> </td>
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            <p  style='text-align:justify'><font size=2>William Champion</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><U><B><font SIZE=2>ANNEX A</font></B></U></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><U><B><font SIZE=2>TRANSFER OF ADMINISTRATIVE AGENT ROLE</font></B></U></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><font size=2>December 18, 2008</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Reference is hereby made to that certain Credit Agreement dated as of May 7, 2007 (as the same has been and hereafter may be amended, restated, supplemented or otherwise modified from time to time, the &#147;</font><u><font size=2>Credit Agreement</font></u><font size=2>&#148;) by and among Black Hills Corporation, a South Dakota corporation (&#147;</font><u><font size=2>Borrower</font></u><font size=2>&#148;), ABN AMRO Bank N.V. (&#147;</font><U><font SIZE=2>ABN AMRO</font></U><font size=2>&#148;), as Administrative Agent, and the financial institutions party thereto as Banks.  Capitalized terms used herein and not otherwise defined shall have the meanings assigned to such terms in the Credit Agreement.  </font></p>

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<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>Pursuant to Section 10.7 of the Credit Agreement, and pending (x) the appointment of The Royal Bank of Scotland plc (&#147;</font><U><font SIZE=2>RBS</font></U><font size=2>&#148;) as successor Administrative Agent under the Credit Agreement and all other Credit Documents executed in connection therewith by the Required Banks and the consent of the Borrower to such appointment (the &#147;</font><u><font size=2>Appointment and Consent</font></u><font size=2>&#148;), and (y) written notice (the &#147;</font><u><font size=2>Notice</font></u><font size=2>&#148;) from ABN AMRO and RBS to the Borrower and the Banks of the intended effective date thereof (which Notice shall be given to them no earlier five (5) Business Days prior thereto and in any event no later than January 30, 2009), that ABN AMRO hereby resigns as Administrative Agent under the Credit Agreement and all of the other Credit
Documents, such resignation to be effective as of the date of the date set forth therefor in the Notice.  Pending such Appointment and Consent and the Notice, RBS hereby accepts its appointment as successor Administrative Agent under the Credit Agreement and all other Credit Documents executed in connection therewith, such appointment to be effective as of the date of such Appointment and Consent. </font></p>

<p style=' margin-bottom:12pt; margin-top:0pt; text-indent:0.5in;text-align:justify;'><font size=2>This letter agreement may be executed in any number of counterparts, each of which shall be deemed an original, and all of which together shall constitute one document.  Delivery of an executed counterpart of this letter agreement by facsimile or other electronic transmission shall constitute valid delivery of an executed counterpart hereof.  This letter agreement shall be governed by the internal laws of the State of New York applicable to contracts made and to be performed entirely within such State.</font></p>

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            <p  ><B><font SIZE=2>ABN AMRO BANK N.V.</font></B></p>
<p  ><font size=2>&nbsp;</font></p>
<p  style='text-align:justify'><font size=2>By: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Allen Broyles</font></p>
<p  style='text-align:justify'><font size=2>Name: Allen Broyles</font></p>
<p  ><font size=2>Title: &nbsp;&nbsp;Director</font></p> </td>
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            <p  ><B><font SIZE=2>THE ROYAL BANK OF SCOTLAND PLC </font></B></p>
<p  ><font size=2>&nbsp;</font></p>
<p  style='text-align:justify'><font size=2>By: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Andrew N. Taylor</font></p>
<p  style='text-align:justify'><font size=2>Name: Andrew N. Taylor</font></p>
<p  ><font size=2>Title: &nbsp;&nbsp;Vice President</font></p> </td> </tr>
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<p  style='text-align:justify'><font size=2>By: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Maria Vanderwarren</font></p>
<p  style='text-align:justify'><font size=2>Name: Maria Vanderwarren</font></p>
<p  ><font size=2>Title: &nbsp;&nbsp;Assistant Vice President</font></p> </td>
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            <p  ><font size=1>&nbsp;</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=3>BLACK HILLS CORPORATION</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:left;'><b><font size=2>Black Hills Contact Information:</font></b></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>Jason Ketchum</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>605-721-2765</font></p> </td> </tr>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Media Relations</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>866-243-9002</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:center;'><B><font SIZE=2>BLACK HILLS CORP. SUCCESSFULLY EXTENDS $383 MILLION </font></B></p>

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

<p style=' margin-bottom:5pt; margin-top:5pt; text-indent:0.4in;text-align:left;line-height: 150%;'><font size=2>RAPID CITY, S.D., December 18, 2008 &#151; Black Hills Corp. (NYSE: BKH) today announced it has successfully extended its $383 million bridge acquisition facility to a December 29, 2009 maturity date from the original termination date of February 5, 2009.  The facility was established in February 2007, providing for a single maximum draw of $1 billion to fund the $940 million purchase of five natural gas and electric utility properties from Aquila.  On July 14, 2008 the Company drew $383 million on the facility to complete the Aquila acquisition, financing the balance of the purchase with cash proceeds from the divestiture of seven independent power production facilities.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.4in;text-align:left;line-height: 150%;'><font size=2>"While our original intent was to complete long-term debt financings for the Aquila purchase in late 2008, the debt capital markets have been largely unfavorable for such transactions," said David Emery, chairman, president and chief executive officer of Black Hills Corp.  "The extension of our bridge facility maturity provides us with the necessary flexibility to complete our financings on terms that we expect to be more favorable for both our shareholders and customers," continued Emery.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;line-height: 150%;'><font SIZE=2>ABOUT BLACK HILLS CORP.</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.38in;text-align:left;line-height: 150%;'><font size=2>Black Hills Corp. &#151; a diversified energy company with a tradition of exemplary service and a vision to be the energy partner of choice &#151; is based in Rapid City, South Dakota with corporate offices in Golden, Colorado and Omaha, Nebraska. The utility companies serve 750,000 natural gas </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;line-height: 150%;'><i><font size=2>- more -</font></i></p>

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<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;line-height: 150%;'><font size=2>and electricity customers in Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming. The company&#146;s non-regulated businesses generate wholesale electricity, produce natural gas, oil and coal, and market energy. Black Hills employees partner to produce results that improve life with energy. More information is available at </font><font color="#0000FF"><u><font size=2>www.blackhillscorp.com</font></u></font><font size=2>.</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;line-height: 150%;'><font SIZE=2>CAUTION REGARDING FORWARD-LOOKING STATEMENTS</font></p>

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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.38in;text-align:left;line-height: 150%;'><font size=2>This news release includes &#147;forward-looking statements&#148; as defined by the Securities and Exchange Commission, or SEC. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this news release that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements. These forward-looking statements are based on assumptions which we believe are reasonable based on current expectations and projections about future events and industry conditions and trends affecting our business. However, whether actual results and developments will conform to our expectations and predictions is subject to a number of risks and uncertainties
that, among other things, could cause actual results to differ materially from those contained in the forward-looking statements, including the factors discussed above, the risk factors described in Item 1A of Part I of our 2007 Annual Report on Form 10-K filed with the SEC, Item 1A of Part II of our September 30, 2008 Quarterly Report on Form 10-Q, and other reports that we file with the SEC from time to time, and the following:</font></p>


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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:162%'><font size=4><b>&#149;</b></font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:162%'><font size=2>Our ability to access the bank loan and debt capital markets and the costs and terms of available financing given the global financial crisis; and </font></p> </td> </tr></table>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:162%'><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;line-height:162%'><font size=4><b>&#149;</b></font></p> </td>
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            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:162%'><font size=2>Other factors discussed from time to time in our filings with the SEC.</font></p> </td> </tr></table>
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<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:0.38in;text-align:left;line-height: 150%;'><font size=2>New factors that could cause actual results to differ materially from those described in forward-looking statements emerge from time-to-time, and it is not possible for us to predict all such factors, or the extent to which any such factor or combination of factors may cause actual results to differ from those contained in any forward-looking statement. We assume no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events or otherwise. </font></p>

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