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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 275 <br />Denver, Colorado 80203 <br />Phone: (303) 8663567 <br />FAX: (303) 832-8106 <br />March 15, 2004 <br />Mc William A. Bear <br />Bowie Resources Limited <br />P.O. Box 483 <br />Paonia, Colorado 81428 <br />RE: Bowie No. 2 Mine, Permit No. C-96-083, Bowie Resources Limited <br />Technical Revision No. 3Q Coal Mine Waste Disposal Site No. 2 <br />Dear Mr. Beaz: <br />COLORADO <br />DIVISION O F <br />MIN SRALS <br />GEOLOGY <br />REC LAMATION•n INING <br />SAFETY•SCIENCE <br />Bill Owens <br />Governor <br />Russell George <br />Enecutive DIreC[Gf <br />Ronald W. Cottony <br />Division Director <br />Natural Resource Trustee <br />The Colorado Division of Minerals and Geology (Division) has fmished its review of the Bowie Resources <br />Limited (BRL) submittal for Technical Revision No. 30. The Division has the following questions and <br />comments: <br />Geotechnical -Roads <br />Please provide information to demonstrate compliance with Rule 4.03.1 for the proposed haul <br />road from Station 123+00 to the vicinity of the proposed cove~ll stockpile as was done <br />previously for the initial portions of this haul road as far as the topsoil stockpiles. The missing <br />part of this road is not considered as within the spoil or mine waste disposal areas jRute <br />1.04(111)] (runoff would not report to Pond F). <br />BRL's response is accepted. The Division has reconsidered this item (as requested by the <br />applicant) and withdraws the request for additional information. Drainage does indeed report to <br />Pond F as indicated on proposed Map No. 20, 02104104, and this short section of road may be <br />considered as part of the distwbed area associated with the piles. <br />Geotechnical -Coal Waste Disposal Site <br />The application includes data obtained from subsurface exploration and geotechnical testing of <br />foundation materials of the proposed fill. Theoretical parameters were used for coal processing <br />waste. There has been a variation in characteristics and strengths ofcoal mine wastes from mines <br />about the State. The Division is considering a stipulation that the operator determine site-specific <br />characteristics (moist unit weight) and strength parameters of cohesion and angle of internal <br />friction ofcoal processing waste materials when the first bench of the gob pile reaches half to <br />three/fourths the design height, and demonstrate that the proposed fill, as approved, will be stable <br />with a minimum factor of safety of I.S. <br />The Division intends to add the following stipulation to the proposed decision for TR-30: <br />THE OPERATOR WILL DETERiYfINE SITE-SPECIFIC CHARACTERISTICS (MOIST UNIT <br />Office of <br />Mined Land Reclamation <br />Office of <br />Active and Inactive Mines <br />CoIG <br />