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• <br />HOMAKE RECEIVED <br />ALAN D. COX ®EC 31 lssa <br />CORPORATE MANAGER, ENVIRONMENTAL AFFAIRS <br />_~v~s!on of Minerals 8 Geology <br />December 7, 1998 <br />State of Colorado <br />Division of Minerals and Geology <br />Durango Field Office <br />484 Turner Drive, Suite F101 <br />Durango, CO 81301-7910 <br />Attn: Mr. Steve S. Shuey, Reclamation Specialist <br />~ III IIIIIIIIIIIII III <br />Received <br />DfC 2 9.1.998 <br />MOh- <br />RE: Bulldog Mine Reclamation Project <br />Infiltration Trench Monitoring <br />November. 1998 Monthly Report <br />Dear Mr. Shuey: <br />h~ <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 thirteenth monthly report as required under the approved TR. <br />We continue to control and manage seepage water emanating from the adit. Seepage flows were <br />directed into the infiltration trench at all times. Flow rates directed to the infiltration trench were below <br />the 30 gpm threshold, as noted in the attached summary table. Trench performance continues to meet <br />or exceed expectations. The two 121 vadose zone piezometers adjacent to the infiltration trench were <br />monitored per the Technical Revision conditions. Vadose zone water was not detected in the <br />piezometers nor was there evidence of surface water in the vicinity of the trench. Vadose zone <br />piezometer monitoring data is attached with other monitoring data for the trench and adit flows. One <br />water quality sample 111-98 Trench Inlet) was taken during the report period on November 7, 1998. <br />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 (WGL Weir) was taken on November 5, 1998. Analytical data are attached. Flow <br />through the weir was estimated to be about 1 B gpm at the time of sampling. <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 />l~ <br />cc: R. Cellan, Grants <br />F. Martinez, Alamosa BLM <br />D. Holmer, Colorado WOCD, Denver <br />J. Rowe / S. Randall, WMCI, Denver <br />0~8~ o Mme rar~8 Gep °9Y <br />®~~~~ <br />iTE. B~~~ Z ®~Y <br />HOMESTAKE MINING COMPANY <br />650 CALIFORNIA STREET•SAN FRANCISCO•CA 94t0&2]BB )a15)90~~8~50 <br />