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iiiiuiiiiiniiiiii <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department o1 Natural Resources <br />1317 Sherman 51., Room 275 <br />Denver, Colorado 80203 <br />phone: (303) 866~J567 <br />FAX: (3071 832-8106 <br />January 11, 2000 <br />Allen Weaver <br />Energy Fuels Mining Company <br />P.O. Box 449 <br />Florence, CO 81226 <br />Re: Raton Creek Mines (Permit No. C-82-055) <br />Minor Revision No. 17 (MR-17) <br />Interseeding Non-Topsoiled Areas <br />Dear Mr. Weaver: <br />DIVISION O F <br />MINERALS <br />GEOLOGY <br />RECLA MA710N <br />MI NING•SAFETY <br />Bill Owero <br />Governor <br />Greg E. Walther <br />Execwive Director <br />bbchael B. Long <br />Dw~sion D~reaor <br />The Division has completed our adequacy review of minor revision no. 17 (MR-17) for the <br />Raton Creek mine submitted by Energy Fuels Mining Company (EFMC). Due 4o regulatory <br />timeframes, please submit a request to extend the decision due date for this revision. Please <br />include enough time for your responses as well as the Division's review. <br />At what rate was the fertilizer applied to the 5.4 acre area in the fall of 1999? The <br />proposed fertilizer rate of 20-20-10 is not the Colorado State University (CSU) <br />recommended rate (see proposed page 485). If the proposed rates of 30 lbs./acre <br />Nitrogen, 30 lbs./acre PZOS and 15 lbs./acre Kz0 were applied, then EFMC will need to <br />add an additional amount of 10 lbs./acre Nitrogen, 30 lbs./acre Pz05 and 25 lbs./acre <br />K20. Page 485 should also be modified to match the CSU calculations. <br />2. Please address how EFMC proposes to reduce the erosivity of the soil substitute and <br />improve permeability. The Division believes addition of organic soil amendments is <br />necessary. Based upon the soil textural classes of sandy loam and sandy clay loam, <br />the recommended amount of amendment would be 25% (by volume). Since topsoiled <br />areas received roughly 4 inches of topsoil, reasonable success could be expected with <br />incorporation of an organic amendment into the top 4 inches of the topsoil substitute. <br />If organic amendment is incorporated in strips, similar to strip seeding techniques, only <br />50% of the area would need the organic material. <br />2.7 acres x 43560 ftZ/acre x 3.08 cubic yards organic material/1000 ftZ <br />= 362 cubic yards organic material <br />