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-iii iiiiiiiiiiiuiii~ <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman 51.. Room 215 <br />Denver, Colorado 80203 <br />Phone: 1]071 866-3567 <br />FAX: 17071832-8106 <br />October 20, 1994 <br />Mr. Ralph Lopez <br />Environmental Engineer <br />Basin Resources, Inc. <br />14300 Highway l2 <br />Weston, CO 81091 <br />Re: Annual Spring and Seep Survey <br />Golden Eagle Mine, Permit No. C-81-013 <br />Basin Resources, Inc. <br />Dear Mr. Lopez: <br />~~~I <br />DEPARTMEN'T' OF <br />NATURAL <br />RESOURCE <br />Roy Romer <br />Govenwr <br />lames 5. Lochhead <br />E>'ecmrve Director <br />Michael e. Long <br />Division Oirecror <br />The purpose of this letter is to confLrm in writing what the Division and Basin Resources <br />discussed by telephone in August and September of this year, concerning the annual spring and <br />seep survey. Basin Resources is to expand the zone of coverage for the annual spring and seep <br />survey at the Golden Eagle Mine, beginning with the spring and seep survey that was already in <br />progress for 1994. This new zone of coverage must extend 2.1 miles out from the furthest extent <br />of anticipated mining for the current permit term, as shown on Map 3, Golden Eagle Mine Plan. <br />This expansion of coverage is based on the conclusion, found in the Probable Hydrologic <br />Consequences section of the Golden Eagle permit, as submitted by Basin Resources for Permit <br />Renewal No. 2, that cone-foot dtawdown in the potentiometric surface, due to mine dewatering, <br />can be expected at a distance of 2.1 miles from the perimeter of mining. The previous spring <br />and seep surveys encompassed a zone extending one mile out from [he permit boundary, as <br />shown in Figure 1.1-1, Monitoring Locations, in the Annual Hydrologic Report for the 1993 <br />water year. <br />If you have any questions, please call me. <br />Sincerely, <br />fl~,~~ <br />seph ]. )dash <br />Environmental Protection Specialist <br />JJD/bjw <br />M: \055\$1 W V1D <br />