DRC-2009-006466 - 0901a068803619db

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DENISO
MINES
November 25, 2009
VIA OVERNIGHT DELIVERY
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DanlMi RUm tUSA) Corp.
10501701 StTMt Sulta 950
Damwf, CO 80265
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Fu: 301389-4125
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Mr. Dane L. Finerfrock
Director
Division of Radiation Control Board
State of Utah Department of Environmental Quality
168 North 1950 West
P.O. Box 144850
Salt Lake City. UT 84114-4850
Re: 2009 Updated Surety, White Mesa Mill, Blanding Utah, Revised Performance Bond
Dear Mr. Finerfrock:
Attached is the revised Performance Bond increasing the surety amount on the White Mesa Mill and Tailings
Management System from $15,017,129 to SI 5,807,429.
If you have any questions or require additional information, please feel free to contact me.
Yours very truly,
DENISON MINES (USA) CORP.
Harold R. Roberts
Executive Vice President- U.S. Operations
cc: Ron F. Hochstein
Jim Anderson
Todd Mears
GENERAL SURETY RIDER
To be attached and form a part of
Type of Bond: Reclamation - White Mesa Uranium Mill, Blanding, UT

February 24, 2006
Denison Mines (USA) Corp., as Principal
Bond Number:
Dated Effective:
Executed by:
and by:
In Favor of:
National Union Fire Insurance Company
of Pittsburgh, PA, as Surety
State ofUtah, Radiation Control Board
In consideration ofthe mutual agreements herein contained, the Principal and Surety
hereby consent to the following changes:
Bond amount is increased from:
Fifteen MiUion Seventeen Thousand One Hundred Twenty Nine
and 00/100 Dollars ($15^017,12^.00)
To:
Fifteen Million Eight Hundred Seven Thousand Four Hundred Twenty Nine
and 00/100 Dollars ($15,807,42^.00)
Nothing herein contained shall vary, alter or extend any provision or condition ofthis
bond except as herein expressly stated.
This rider is effective November 23, 2009.
Signed, sealed and dated this 23rd November, 2009.
Denison Mines (USA) Corp.
National Union Fire Insurance Company
of Pittsburgh, PA