CARBON ENERGY CORP
EX-10.1
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<DESCRIPTION>EX-10.1
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit
10.1</font></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><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;text-autospace:none;"><b><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">FIRST
AMENDMENT OF AMENDED AND RESTATED CREDIT AGREEMENT</font></u></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIS FIRST AMENDMENT OF AMENDED AND RESTATED CREDIT
AGREEMENT (this &#147;Amendment&#148;), dated as of March 24, 2003, is by and between
CARBON ENERGY CORPORATION (USA), a Colorado corporation (&#147;Borrower&#148;), and BANK
OF OKLAHOMA, NATIONAL ASSOCIATION, a national banking association (&#147;BOK&#148;).</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">RECITALS</font></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">A.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Borrower and BOK entered into an Amended and
Restated Credit Agreement dated as of December 31, 2002 (the &#147;Credit
Agreement&#148;), in order to set forth the terms upon which BOK would make advances
to Borrower, issue letters of credit at the request of Borrower and extend
credit to Borrower in connection with Borrower&#146;s hedging activities and by
which such advances, letters of credit and credit extensions would be governed
and repaid.&#160; Capitalized terms used
herein but not defined herein shall have the same meanings as set forth in the
Credit Agreement.</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">B.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Borrower and BOK desire that this Amendment
be executed and delivered in order to amend certain terms and provisions of the
Credit Agreement.</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">AMENDMENT</font></b></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">NOW, THEREFORE, in consideration of $10.00 and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
the parties hereby agree as follows:</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Credit Agreement</u>.&#160; The
Credit Agreement shall be, and hereby is, amended as follows as of the date
hereof:</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.4in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>By substituting the following for the
definition of &#147;Borrowing Base&#148; in Section 1.1 on page 2 of the Credit
Agreement:</p>

<p style="background:white;margin:0in 0in .0001pt .5pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt .8in;text-autospace:none;text-indent:1.2in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;<u>Borrowing Base</u>&#148; means, at any time prior to the Maturity Date,
the aggregate loan value of all Borrowing Base Properties, as determined by BOK
in its sole and absolute discretion, using such assumptions as to pricing,
discount factors, discount rates, expenses and other factors as BOK customarily
uses as to borrowing-base oil and gas loans at the time such determination is
made; provided that the Borrowing Base for the time period from March 25, 2003
through the ensuing redetermination or reduction of the Borrowing Base pursuant
to Section 2.9 below shall be $14,000,000, unless Borrower and BOK hereafter
mutually agree upon a different amount.</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>


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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;text-autospace:none;">&nbsp;</p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.4in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>By substituting the following for the
definition of &#147;Borrowing Base Period&#148; in Section 1.1 on page 2 of the Credit
Agreement:</p>

<p style="background:white;margin:0in 0in .0001pt 2.4pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt .8in;text-autospace:none;text-indent:1.2in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;<u>Borrowing Base Period</u>&#148; means: (a) the time period from the date
of this Agreement through March 24, 2003; (b) the time period from March 25,
2003 through November 30, 2003; (c) thereafter, each six-month period beginning
on June 1 or December 1 of each year, until the June 1 or December 1 most
nearly preceding the Maturity Date; and (d) thereafter, the time period from
the June 1 or December 1 most nearly preceding the Maturity Date through the
Maturity Date.</font></p>

<p style="background:white;margin:0in 0in .0001pt 51.6pt;text-autospace:none;text-indent:88.3pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.4in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>By substituting the following for the
definition of &#147;Maximum Loan Amount&#148; in Section 1.1 on page 8 of the Credit
Agreement:</p>

<p style="background:white;margin:0in 0in .0001pt 1.45pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt .8in;text-autospace:none;text-indent:1.2in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;<u>Maximum Loan Amount</u>&#148; means $14,000,000; provided that, upon the
request of Borrower, BOK may, in its sole discretion and upon such terms and
conditions as BOK may determine, increase said amount to an amount not greater
than $40,000,000 by giving written notice of such increase to Borrower, but
nothing contained in this Agreement, the Note or any other Loan Document shall
be deemed to commit or require BOK to grant any such increase.</font></p>

<p style="background:white;margin:0in 0in .0001pt 51.1pt;text-autospace:none;text-indent:88.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Loan Documents</u>.&#160; All
references in any document to the Credit Agreement shall be deemed to refer to
the Credit Agreement, as amended pursuant to this Amendment.</p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Conditions Precedent</u>.&#160; The
obligations of the parties under this Amendment are subject, at the option of
BOK, to the prior satisfaction of the condition that Borrower shall have
delivered to BOK the following (all documents to be satisfactory in form and
substance to BOK and, if appropriate, duly executed and/or acknowledged on
behalf of the parties other than BOK):</p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt .5in;text-autospace:none;text-indent:.9in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>This Amendment.</p>

<p style="background:white;margin:0in 0in .0001pt 102.95pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt .5in;text-autospace:none;text-indent:.9in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>A Consent of Guarantor in the form of Exhibit
A attached hereto and made a part hereof.</p>

<p style="background:white;margin:0in 0in .0001pt 28.55pt;text-autospace:none;text-indent:74.4pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt .5in;text-autospace:none;text-indent:.9in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Any and all other loan documents required by
BOK, including without limitation any and all amendments to the Security
Documents as may be required by BOK.</p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><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;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>


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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;text-autospace:none;">&nbsp;</p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Certification by Borrower</u>.&#160;
Borrower hereby certifies to BOK that, as of the date of this Amendment,
except as previously disclosed by Borrower to BOK: (a) all of Borrower&#146;s
representations and warranties contained in the Credit Agreement are true,
accurate and complete in all material respects, (b) Borrower has performed and
complied with all agreements and conditions required to be performed or
complied with by Borrower under the Credit Agreement and/or any Loan Document
on or prior to this date, and (c) no Default or Event of Default has occurred
under the Credit Agreement.</p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:66.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Continuation of the Credit Agreement</u>.&#160;
Except as specified in this Amendment, the provisions of the Credit
Agreement shall remain in full force and effect, and if there is a conflict
between the terms of this Amendment and those of the Credit Agreement, the
terms of this Amendment shall control.</p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:66.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Expenses</u>.&#160; Borrower shall pay all expenses
incurred in connection with the transactions contemplated by this Amendment,
including without limitation all fees and expenses of the attorney for BOK and
any and all filing and recording expenses.</p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:66.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">7.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><u>Miscellaneous</u>.&#160;
This Amendment shall be governed by and construed under the laws of the
State of Colorado and shall be binding upon and inure to the benefit of the
parties hereto and their successors and assigns.&#160; This Amendment may be executed in any number of counterparts,
each of which shall be an original, but all of which together shall constitute
one instrument.</p>

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<p style="background:white;margin:0in 0in .0001pt 1.0in;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">EXECUTED
as of the date first above written.</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">BANK OF OKLAHOMA, NATIONAL
  ASSOCIATION</font></p>
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  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
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  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="4%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:4.58%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="45%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Thomas M. Foncannon, </font></p>
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  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="45%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Senior Vice President</font></p>
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  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="50%" colspan="4" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
 </tr>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="50%" colspan="4" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">CARBON ENERGY CORPORATION
  (USA)</font></p>
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 </tr>
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  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="50%" colspan="4" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="50%" colspan="4" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="3%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:3.7%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
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  <td width="28%" colspan="2" valign="top" bgcolor="white" style="background:white;border:none;border-bottom:solid windowtext .5pt;padding:0in 0in 0in 0in;width:28.74%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="17%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:17.56%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="4%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:4.58%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="45%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Kevin D. Struzeski, </font></p>
  </td>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="4%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:4.58%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="45%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Chief Financial Officer</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><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;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>


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<p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT A</font></u></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><u><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">CONSENT OF GUARANTOR</font></u></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">THIS
CONSENT OF GUARANTOR (this &#147;Consent&#148;), dated as of March 24, 2003, is from
CARBON ENERGY CORPORATION, a Colorado corporation (&#147;Guarantor&#148;), to BANK OF
OKLAHOMA, NATIONAL ASSOCIATION, a national banking association (&#147;BOK&#148;).</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">RECITALS</font></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">A.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Guarantor has executed and delivered to BOK a
Guaranty dated as of December 31, 2002 (the &#147;Guaranty&#148;), to guaranty certain
obligations of Carbon Energy Corporation (USA) (&#147;Borrower&#148;) to BOK under or in
connection with an Amended and Restated Credit Agreement dated as of December
31, 2002 (the &#147;Credit Agreement&#148;).</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">B.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>The Credit Agreement is being amended
pursuant to a First Amendment of Amended and Restated Credit Agreement of even
date herewith (the &#147;Amendment&#148;), between Borrower and BOK.</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">C.</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>The parties desire that Guarantor consent to
the modifications of the Credit Agreement being made pursuant to the Amendment.</p>

<p style="background:white;margin:0in 0in .0001pt .7pt;text-autospace:none;text-indent:65.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">CONSENT</font></b></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">NOW,
THEREFORE, in consideration of $10.00 and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
Guarantor hereby consents to the transactions set forth in and contemplated by
the Amendment, including without limitation the change in the &#147;Maximum Loan
Amount&#148; (as defined in the Credit Agreement) and the &#147;Borrowing Base&#148; (as
defined in the Credit Agreement) to $14,000,000.</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This
Consent may be executed in any number of counterparts, each of which shall be
an original, but all of which together shall constitute one and the same
instrument.&#160; Guarantor hereby ratifies
the Guaranty.</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="background:white;margin:0in 0in .0001pt;text-autospace:none;text-indent:1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">EXECUTED
as of March 24, 2003.</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="39%" colspan="5" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:39.76%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">CARBON ENERGY CORPORATION</font></p>
  </td>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="39%" colspan="5" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:39.76%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="3%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:3.32%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
  </td>
  <td width="30%" colspan="3" valign="top" bgcolor="white" style="background:white;border:none;border-bottom:solid windowtext .5pt;padding:0in 0in 0in 0in;width:30.12%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="6%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:6.32%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
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 <tr>
  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="4%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:4.32%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="25%" valign="top" bgcolor="white" style="background:white;border:none;border-bottom:solid windowtext .5pt;padding:0in 0in 0in 0in;width:25.5%;">
  <p style="font-size:1.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="9%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:9.94%;">
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">,</font></p>
  </td>
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  <td width="50%" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:50.0%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
  </td>
  <td width="4%" colspan="2" valign="top" bgcolor="white" style="background:white;padding:0in 0in 0in 0in;width:4.32%;">
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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  <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;">&nbsp;</p>
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<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">A-1</font></p>


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