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III IIIIIIIIIIIIIIII <br />• 999 <br />~!y byVl •- Ho~fa .aI:E <br />ALAN D. COXALAN D. COX <br />CORPORATE MANAGER, ENVIRONMENTAL AFFAIRS <br />1 ~ July, 1 sss <br />State of Colorado <br />/frj•~ Division of Minerals and Geology <br />Durango Field Office <br />484 Turner Drive, Suite F101 <br />Durango, CO 81301-7910 <br /> <br />.J .. 1 ~... ~. .. <br />~.. ~ ._ <br />Received <br />Jl1L 2 2 1°98 <br />Attn: Mr. Steve S. Shuey, Reclamation Specialist Durango Field Office <br />Division of Minsrals 8 Geology <br />RE: Bulldog Mine Reclamation Protect <br />j~ec. Nc.~-~2 <br />Infiltration Trench Monitoring <br />June, 1998 Monthly Report <br />Dear Mr. Shuey: <br />Pursuant to the Technical Revision to the Reclamation Permit for the Bulldog Reclamation Project <br />pertaining to installation and operation of an infiltration trench to accommodate seepage from the 9360 <br />adit, attached is a copy of the monthly monitoring data and associated water quality analyses. This is <br />the eighth monthly report as required under the approved TR. <br />During the reporting period construction continued on the installation of an adit seal ire the 9360 adit. <br />We continue to control and manage seepage water emanating from [he adit. Seepage flows were <br />directed into the infiltration trench and/or the spray evaporation system. Flow rates directed to the <br />infiltration trench were below the 30 gpm threshold. Trench performance continues to meet or exceed <br />expectations. The two 121 vadose zone piezometers adjacent to the infiltration trench were monitored <br />per the Technical Revision conditions. No problems with vadose zone water next to the trench were <br />observed. Vadose zone piezometer monitoring data is attached with other monitoring data for the <br />trench and adit flows. One water quality sample 198-6 Trench Inlet) was taken during the report period <br />on June 3, 1996. Analytical data are attached. <br />In addition, as part of this monthly report and in accordance with the 9360 Level Adit Closure <br />Monitoring Plan, dated April 1998, Windy Gulch monitoring was continued during this period. One <br />water quality sample 198-6 WGWB) was taken on June 3, 1998. Analytical data are attached. Flow at <br />the time of sampling was estimated to be about 220 gpm through the existing weir. <br />Thank you for your time and attention on this matter. If you have any questions, please contact me in <br />the San Francisco office. <br />Very Truly Yours, / <br />~° <br />cc: R. Cellan, Grants <br />F. Martinez, Alamosa BLM <br />D. Holmer, Colorado WOCD, Denver <br />J. Rowe / S. Randall, WMCI, Denver <br />RECEIVED <br />JUL 2 81998 <br />DIV. OF MINERALS <br />& GEOLOGY <br />HOMESTAKE MINING COMPANY <br />650 CALIFORNIA STREET • $AN FRANQSCO • CA 9H0&2]BB (O15) 9B•-8150 <br />