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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <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 />June 19, 2003 <br />Mr. William A. Bear Jr. <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. 26, Clarification Aid for Pond C <br />Dear Mr. Bear: <br />DIVISION OF <br />MINERALS <br />GEOLOGY <br />RECLAMATION <br />MI NING•SAFETY <br />Bill Owens <br />Governor <br />Greg E. Walther <br />Executive Director <br />Ronald W. Cattany <br />Division Director <br />The Colorado Division of Minerals and Geology (Division) has finished its review of the Bowie <br />Resources Limited (BRL) submittal for Technical Revision No. 26. The Division reviewed the <br />situation of clarified mine water discharge as it pertains to surface water and ground water <br />effects. The Division agrees with BRL's flow and dilution calculations concerning NALCO <br />7880. The Division also agrees with BRL's assessment that the use of the clazification aid will <br />not have a negative effect on the irrigation water in the Fire Mountain Canal and in the Deer Trail <br />Ditch. However, the Division does have the following questions and comments: <br />Please revise the appropriate permit application page to describe how the clarification aid <br />will be added to the pond water and how the proper dosage of clarification aid will be <br />assured. <br />If mine water with the clazification aid discharges from Pond C and flows into the Deer <br />Trail Ditch and/or the Fire Mountain Canal when there is no irrigation water in the ditch <br />or canal, no dilution of the clarification aid will take place. Besides irrigation, what water <br />uses are possible from this ditch and canal, if any, and what will be the impact of the <br />mine water on those uses? <br />If there is continuous discharge of mine water from the Bowie No. 2 Mine, BRL has <br />committed to discharge in-compliance mine water directly into D Gulch, without any <br />clazification aid. It is unclear from Map 21-3 whether this discharge would ultimately <br />flow directly into ditch D-H 1 or, first, flow into ditch D-H2 and, then, into ditch D-H 1. <br />The hydrology designs for ditch D-H1 account for 0.5 cfs (225 gpm) of mine water <br />discharge. However, ditch D-H2 does not account for any mine water discharge in the <br />hydrology designs. Please clarify whether mine water discharge from D Gulch would go <br />first into ditch D-HI or into D-H2. <br />4. On page 2.05-74, the effects on irrigation water by discharging mine water into D Gulch <br />aze discussed. Please add a discussion on the effects on the ground water by discharging <br />