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R • TZA TED ZoafcH & ASSOCIATES, INC. QT1901'" '~ oeKVE+e ocEaw.no eoaio C0161A T11!( EMC~~EEPS N MATER iE50uRCE5 (JOJ)777dSb1 September 25, 1985 ~1 SEP 25 I~~ Mined Land Reclamation Division 1313 Sherman Street MINED LAND Denver, Colorado 80203 RECLAMATION OIVISIOi`1 Re: Gold Hill Ventures Application for an Amendment, Hydrologic Evaluation Gentlemen: Gold Hill Ventures Limited Partnership has submitted an application to the Mined Land Reclamation Board for an Amend- ment to a Mining and Reclamation Permit. Residents of the towns of Gold Hill, Summerville, and Salina have expressed a concern that granting the proposed amendment would affect the quality of their water supply. The purpose of this letter report is to address those concerns. A. Description of Project Gold Hill Ventures is constructing a milling facility approximately 1/2 mile east of the Town of Gold Hill. To supply the necessary water requirements for the milling operation, Gold Hill Ventures intends to pump water from Left Hand Creek into storage in underground mine workings that are located in the Time, Wynona, and Hazel A. Mines. Storage of water is required because the water rights allow for diver- sion only from April 1 through October 31 annually and the mill will operate year-round. The tailings from the mill will be impounded in a lined pond and surface runoff will be diverted away from the pond by installing drainage ditches. The drain- age area above the tailings pond is 1.27 acres. As part of the project, the Cash and Who Do Mines will be dewatered. Maps showing the location of mines, tailings pond, and mill site have been submitted to your office by Gold Hill Ventures. B. Description of Study Area The mill site and tailings pond is at an elevation of approximately 8,450 feet based on the U.S.G.S. 7.5 minute Gold Hill quadrangle. The drainage in the area of the mill site is to the east into the Gold Run Drainage which is part of the Four Mile Creek Drainage. The towns of Summerville and Salina are located within the Gold Run Drainage. Gold Hill is located west of the mill site and drainage from the mill site area will not occur in that direction.