Amendment to Sixth Amended and Restated Credit Agreement

Exhibit 10(a)

March 28, 2008

Denbury Onshore, LLC
Denbury Resources Inc.
5100 Tennyson Parkway, Suite 1200
Plano, Texas 75024
Attn: Phil Rykhoek

Re:		Sixth Amended and Restated Credit Agreement dated as of September 14, 2006 (as amended, the “Credit Agreement”) among Denbury Onshore, LLC, a Delaware limited liability company (“Borrower”), Denbury Resources Inc., a Delaware corporation, as Parent Guarantor (“Parent”), JPMorgan Chase Bank, N.A., as Administrative Agent (“Administrative Agent”), the other agents parties thereto, and the financial institutions parties thereto as Banks (“Banks”) (unless otherwise defined herein, all terms used herein which are defined in the Credit Agreement shall have the meaning when used herein assigned to such terms in the Credit Agreement)

Gentlemen:

1. Borrowing Base. Pursuant to Section 5.2 of the Credit Agreement, the Borrowing Base shall be $1,000,000,000.00 effective April 1, 2008, and continuing until the next Redetermination thereafter. Borrower and Banks agree that the Borrowing Base redetermination provided for herein shall be the April 1, 2008 Scheduled Redetermination and shall not be considered or deemed to be a Special Redetermination.

2. Borrowing Base Provisions. Notwithstanding anything to the contrary contained in the Credit Agreement or any other Loan Paper, Section 5.2(b) of the Credit Agreement shall be amended effective as of the date hereof to read in full as follows:

     “(b) [intentionally deleted],”.

3. Legal Expenses. Borrower hereby agrees to pay on demand all reasonable fees and expenses of counsel to Administrative Agent incurred by Administrative Agent in connection with the preparation, negotiation and execution of this letter agreement and all related documents.

4. Counterparts. This letter agreement may be executed in counterparts, and all parties need not execute the same counterpart; however, no party shall be bound by this letter agreement until a counterpart hereof has been executed by Borrower, Parent and each Bank. Facsimiles or other electronic transmission (e.g., pdf) shall be effective as originals.

5. Complete Agreement. THIS LETTER AGREEMENT REPRESENTS THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES.

Denbury Onshore, LLC
Denbury Resources Inc.
March 28, 2008
Page 2

6. Loan Paper. This letter agreement constitutes a “Loan Paper” under and as defined in Section 2.1 of the Credit Agreement.

Please evidence your agreement to each of the provisions of this letter agreement by executing a counterpart hereof where indicated and returning a fully executed counterpart to Jim Matthews, counsel for Administrative Agent, via facsimile number (214)  ###-###-####, or via electronic e-mail ***@***.

[SIGNATURE PAGES TO FOLLOW]

		Very truly yours,
		ADMINISTRATIVE AGENT:
		JPMORGAN CHASE BANK, N.A.,
		as Administrative Agent
		By:		/s/ J. Scott Fowler   J. Scott Fowler,
				Senior Vice President
		BANKS:
		JPMORGN CHASE BANK, N.A.
		By:		/s/ J. Scott Fowler   J. Scott Fowler,
				Senior Vice President

[Signature Page to Borrowing Base Letter]

		BANKS:
		FORTIS CAPITAL CORP.
		By: Name:		/s/ David Montgomey   David Montgomey
		Title:		Director
		By: Name:		/s/ Darrell Holley   Darrell Holley
		Title:		Managing Director

[Signature Page to Borrowing Base Letter]

		BANKS:
		CALYON NEW YORK BRANCH
		By: Name:		/s/ Michael D. Willis   Michael D. Willis
		Title:		Director
		By: Name:		/s/ Sharada Manne   Sharada Manne
		Title:		Director

[Signature Page to Borrowing Base Letter]

		BANKS:
		COMERICA BANK
		By: Name:		/s/ Rebecca L. Wilson   Rebecca L. Wilson
		Title:		Assistant Vice President

[Signature Page to Borrowing Base Letter]

		BANKS:
		UNION BANK OF CALIFORNIA, N.A.
		By: Name:		/s/ Alison Fuqua   Alison Fuqua
		Title:		Assistant Vice President
		By: Name:		/s/ Whitney Randolph   Whitney Randolph
		Title:		Assistant Vice President

[Signature Page to Borrowing Base Letter]

		BANKS:
		BANK OF AMERICA, N.A.
		By: Name:		/s/ Stephen J. Hoffman   Stephen J. Hoffman
		Title:		Managing Director

[Signature Page to Borrowing Base Letter]

		BANKS:
		BANK OF SCOTLAND plc
		By: Name:		/s/ Karen Weich   Karen Weich
		Title:		Vice President

[Signature Page to Borrowing Base Letter]

		BANKS:
		COMPASS BANK
		By: Name:		/s/ Murray E. Brasseux   Murray E. Brasseux
		Title:		Executive Vice President

[Signature Page to Borrowing Base Letter]

		BANKS:
		WELLS FARGO BANK, N.A.
		By: Name:		/s/ Catherine Stacy   Catherine Stacy
		Title:		Portfolio Manager

[Signature Page to Borrowing Base Letter]

		ACKNOWLEDGED AND AGREED as of the 28th day of March, 2008
		PARENT:
		DENBURY RESOURCES INC., a Delaware corporation
		By:		/s/ Phil Rykhoek   Phil Rykhoek,
				Senior Vice President and Chief Financial Officer
		BORROWER:
		DENBURY ONSHORE, LLC,
		a Delaware limited liability company
		By:		/s/ Phil Rykhoek   Phil Rykhoek,
				Senior Vice President and Chief Financial Officer

[Signature Page to Borrowing Base Letter]