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March 3, 1997 <br />iii iiiiiuiiiiiiiii <br />999 <br />CITIES SERVICES DEPARTMENT <br />Environmental Services Division <br />Larry Oehler <br />Division of Minerals and Geology <br />Department of Natural Resources ~~ ~~ ;' ~99~ <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Subject: Request for Initial Impression <br />Plant Cooling Tower Water for Mining Operations Use <br />Certified # P 136 669 425 RRR <br />Dear Larry: <br />Thanks for talking with me last week concerning a possible alternate water source for the <br />Western Mobile gravel mine located directly north of the Nixon Power Plant. I appreciate <br />your offer to take aquick-look at the water analysis for the alternate source. The initial <br />reaction you and Dr. Posey have to the idea will help us decide whether or not to further <br />pursue this idea. Should the project prove feasible, 1 understand that Western Mobile will <br />need to submit a mining permit technical revision and a more thorough review will be <br />required. <br />The Western Mobile mine currently purchases potable water (-30-80 million gallons/year) for <br />gravel processing (no chemicals are used in this process). This mine uses three unlined <br />ponds for water storage and settling. As an alternate, use of cooling tower water from the <br />Nixon Power Plant is being considered. This alternate would have the following advantages: <br />• Lower the demand from the limited City of Fountain water supply <br />• Allow for reuse of our plant water <br />• Save money for both the mine and power plant operations <br />A typical cooling tower water analysis and a listing of tower chemical additives are attached <br />for your review. We are currently analyzing the water chemistry of the mining process and <br />cooling tower waters to determine if the project is chemically feasible. <br />Thanks again for your help. Please call me any time concerning this matter (719)448-8699. <br />Sincerely, <br />Carol M. Baker <br />Attachments <br />102 S. Weber Street, Colorado Springs, Colorado 80903-1908 • TEL 719-448-8688 FAX 719-448-8666 <br />Mailing Address: Post Office Box 1103, Mail Code 1505 • Colorado Springs, Colorado 80947-0001 <br />COLORADO SPRINGS UTILITIES <br />