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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />07 April 2008 <br />C O L O R A D O <br />D I V 15 1 O tJ O F <br />RECLAMAT [ON <br />M [N ING <br />- & --- <br />SAFETY <br />Bill Ritter, Jr. <br />Governor <br />Harris D. Sherrnan <br />Executive Director <br />Mr. Steve Boyle Ronald W. Cattany <br />Division Director <br />BI~-LOgIC, I11C. Natural Resource Tnistee <br />635 E. Main St., Suite 100 <br />---- - - -Montrose,-CO 8140-1 --- --- -- -- - - - - - -- - - --- - <br />Re: Western Fuels -Colorado, LLC, New Horizon Mine (Permit No. C-1981-008) <br />2007 Vegetation Sampling for Bond Release -Alternative Statistical Approach <br />Dear Mr. Boyle: <br />The Colorado Division of Reclamation, Mining and Safety ("Division") is in receipt of your <br />letter dated O1-Apr-2008 requesting the use of a proposed alternative approach to demonstrate <br />sample adequacy for the 2007 cover data for the proposed Irrigated Pasture reference area at <br />New Horizon Mine. <br />The Division has reviewed the information detailed in the letter, and concurs with the modified <br />statistical approach and rationale presented therein. We agree that the approach presented does <br />provide a statistically adequate sample size, that the resulting estimate of the 2007 cover mean <br />for the proposed reference area would be considered statistically valid, and that the adjusted data <br />as presented would meet regulatory requirements for use in demonstration of vegetation cover <br />success in a Phase 2 or Phase 3 bond release application. <br />Please do not hesitate to contact me if you require any additional information regarding this <br />approval. I have enclosed my business card for your future reference. <br />Best regards, <br /> <br />Marcia L. Talvitie, P.E. <br />Environmental Protection Specialist <br />xc: Sandy Brown, DRMS -Denver <br />Dan Mathews, DRMS -Grand Junction <br />Ross Gubka, Western Fuels -Colorado, LLC <br />Greg Lewicki, Greg Lewicki & Associates <br />office of <br />Office of <br />Mined I ~anr) R~cl,3m,otinn Denver Grand Junction Duraneo Active and lcraetive tiGnes <br />- -- - ~-- <br />- - -- - <br />