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J. E. STOVER & ASSOCIATES III III III IIIIIIIIII <br />2768 COMPASS DRIVE, SUITE 101 999 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (970) 245-4101, FAX 242-7908 <br />MINE ENGINEERING CIVIL ENGINEERING <br />MINE RECLAMATION R ~ r.Fiv E D CONSTRUCTION MANAGEMENT <br />December 4, 1995 DEC 0 6 1995 <br />Division or rounerais ~ ueoiogy <br />A. J. Waldron <br />Division of Minerals and Geology <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: Bowie Resources Limited - Bowie No. 1 Mine <br />Sediment Pond Repair - TR-027 <br />Permit C-81-038 <br />Dear Mr. Waldron: <br />On July 28, 1995 the Operator submitted an application for a technical <br />revision to incorporate a sediment pond repair plan into the permit. <br />The repair plan provided for the construction of an earthen embankment <br />at the downstream face on the binwall dams. The Division's letter <br />dated September 28, 1995 transmitted its adequacy review of the repair <br />plan. The Operator responded to the Division's adequacy review by its <br />letter dated October 5, 1995. <br />During October, the Operator received a proposal from a local company <br />to use polyurethane grout to repair the dams. The grout was to be <br />injected into the dams through holes drilled into the downstream face <br />of the dams. <br />The Operator decided, based on price and schedule, to use polyurethane <br />grout to repair the dams. The grouting work has been completed and it <br />is believed the dams will no longer leak excessively. The lower three <br />dams, numbers 2, 3 and 9 were repaired. <br />The Operator intends to revise the primary spillways on the dams. A <br />12-inch valve will be installed at the outlet end of each of the <br />primary Spilll•/ayS. The s_~e of the primary spil~a,ays .s presented on <br />Map No. 8A-4. All four of the primary spillways are 12-inches in <br />diameter, therefore the installation of the 12-inch valves will not <br />change the design discharge capacity of the primary spillways. <br />Please approve the polyurethane grout repair of the dams and the <br />installation of the 12-inch valves at the outlet end of each of the <br />primary spillways through approval of technical revision number 27. No <br />revised pages or maps will result from this approval. Please call if <br />you have any questions. <br />Sin erely, <br />Jim Stover, P.E. <br />Consulting Engineer <br />cc: Basil Bear <br />