2010-06-21_REPORT - M2007044

• Permit No: M2007044
• IBM Index Class Name: REPORT
• Doc Date: 6/21/2010
• Doc Name: Annual sediment pond stability report
• From: Energy Fuels Resources
• To: DRMS
• Email Name: GRM
• Media Type: D
• Archive: No

June 15, 2010
Energey Fv&,r s
Randy Price
Mesa County Department of Planning and Economic Development
P.O. Box 20000
Grand Junction, CO 81502-5022
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Re: Whirlwind Mine 2009 Annual Sediment Pond Stability Report JUN 28 2010
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Dear Mr. Price, 04 M + Division ct r:ocipm +on,
Mining and Sgety
Energy Fuels Resources Corp. (Energy Fuels) is submitting this letter to update your
office on the monitoring of the sediment pond posts at the Whirlwind Mine near Gateway
Colorado. The Whirlwind Mine is permitted with Mesa County under Conditional Use
Permit No. 2007-299 CUP 1.
Comments were received by Mesa County (M1987r. Jim Komatinsky) on October 1,
2007 from the Colorado Geological Survey (CGS, Ms. Celia Greenman) regarding the
Whirlwind Mine Conditional Use Permit. The comments of primary concern from CGS
were in regards to stability of the slopes downgradient of the, then proposed, sediment
pond and treatment plant. Despite Energy Fuels opinion that there was no evidence of
slope instability in the mine facilities area, Energy Fuels agreed in subsequent
correspondence with CGS to install and monitor four stability monitoring posts
immediately downgradient of the sediment pond.
The stability monitoring posts were installed along the northern edge of the sediment
pond following its construction in late 2008. The posts consist of steel re-bar, installed
vertically into the ground at least 24" deep. The monitoring program consists of
checking the posts for verticality on a monthly basis and surveying the tops of the posts
annually. A survey was performed on November 7, 2008 to provide initial locations of
the tops of each post. Following installation, the posts were checked on a monthly basis
for plumb between January 2009 and April 2010, with the exception of March 2010. The
March 2010 check could not be conducted as the mine site remained inaccessible for the
entire month due to excessively deep snow. The posts were found to be plumb in every
check. A follow-up survey of the posts was conducted on April 21, 2010. The survey
results are included in the attached table. The four posts do show movement between
0.01 and 0.09 feet, consistent with survey error and freeze/thaw movement. The
movement of each post is in a different direction. Based on the small magnitude and
random direction of the movement, we feel there is not any measureable instability
associated with the sediment pond.
Energy Fuels. Inc. 44 union Blvd.. Suite 600
,,N1vw.ener2yfiiels.com Lakewood, Colorado 80228
Phone: [phone]
Fax: [phone]