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_ ~ iii iiiiuiiiiiiiiii <br />`ii VV 9~ <br />ALAN D. COX <br />CORPOAAiE MANAGER, ENVIRONMENTAL AFFAIRSPQR "~~ ~gc~°~ <br />.~t~\c~ <br />• ' April 9, 1999 <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 />RE: Bulldog Mine Reclamation Protect <br />Received <br />APR 14 ~~ <br />~~ra <br />D~~+cn c1~ a ~ & Gec <br />~9Y <br />®~~p i <br />N ~~ <br />,r-1f~ <br />~rt ~o~rbr~ 2e f,~ <br />PO+-~ <br />Infiltration Trench Monitoring <br />March, 1999 Monthly Report <br />Dear Mr. Shuey: <br />Pursuant to the Technical Revisicit to the Reclamaticn Permit for the Bulldog Reclamlation Project <br />pertaining to installation and operarinn of an infi!tratiort trenutl to accommodate seepaye from the 9360 <br />adit. attached is a copy of the monthly rnoltitoring data and associated water quality analyses. This is <br />tfle seventeenth monthly report as required under the approved TR. <br />We continue to control and manage seepage water emanating from the adit. Seepage floes were <br />directed into the infiltration trench at all times. Flow rates directed to the infiltration trench were below <br />tfie 30 gpm threshold, as noted i!t r.he att;tuhed sumrrlary table. Trench performance continues to meet <br />ur exceed expectations. The two .21 vadcse zone piezonteteis adjacent to the infiltration treitrh were <br />monitored per the Technical Revisinrt conditions. Jadose zone water was not detected In the <br />piezometers nor was there evidence of surface water in the vicinity of the trench. Vaduse zone <br />piezometer monitoring data is attached with other monitoring data for the trench and adit flows. Two <br />water quality samples 13-99 Trench Inlet & 3-16-99 Trench Inleti were taken during the report period; <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 monitoriny was continued during this period. No flow <br />was observed due to frozen conditions at the WGL weir on March 5, 1999, and therefore a water <br />quality sample was not taken. <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 />cc: R. Cellan, Grants <br />F. Martinez, Alamosa BLM <br />D. Holmer, Colorado WOCD, Denver <br />J. Rowe / S. Randall, WMCI, Denver <br />HOMESTAKE MINING COMPANY <br />650 CALIFORNIA STREET • SAN FRANCISCO • CA 9<1062r80 (a15) 9B~ 8150 <br />