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ROY A. CELLAN Corporate Manager Reclamalmn October 25, 2001 State of Colorado Division of Minerals and Geology Durango Field Office 701 Camino Del Rio, Room 125 Durango, CO 81301 Attn: Mr. Bob Oswald, Reclamation Specialist 'd ~•. `~rd c ~8%V~ OCT 2 9 2001 Ott,/a~o~gpe a~8 Goo o9Y RE: Bulldog Mine Reclamation Project September, 2001 Monthly Monitoring Report Dear Mr Oswald: Pursuant to the Technical Revisions tc the Reclamation Permit for the Bulldog Reclamation Project, this is the forty -sixth monthly report pertaining to 11 installation and operation of an infiltration trench to accommodate seepagr from the 9360 adit, and 21 closing the valve at the 9360 adit plug. The Division of Minerals and Geology (DMGj, irl a letter dared March 8 1999, issued a conditional approval for Hol~~estake Mining Company (HMCI to close the valva at the 9360 adit plug. Subsequent to DMG's approval, HMC closed the valve to the adit plug on April 1, 1999. Since closure of the adit plug valve, no flow has been directed into thr. infiltration trench. Monitoring of the hydraulic conditions behind the adit plug indicated ghat as of August 25, 1999, conditions had stabilized (ie pressure measurements stabilizedl. .4s a result, DMG approved initiation of the planned tracer test IRef: Letter from WMCI to Mr. Steve Shuey, dated August 27, 19991. The tracer test subsequently began on September 9, 1999. With the initiation of the tracer test, HMC is committed to the monitoring summarized in Table 1 in accordance with the approved Technical Revisions. The revised monitoring program was initiated in September 1999. A summary of the monthly monitoring data is presented in Table 2. Based or. the required visual inspection around the adit plug, the plug is impounding water behind it with no signs of seepage and/or development of seeps around the portal area. A pressure measurement and visual observation was completed of the 9360 adit plug and portal on September 14, 2001 and recorded in Table 3. As part of this monthly report and in accordance with the 9360 Level Adit Closure Monitoring Plan, dated April 1998, Windy Gulch monitoring was continued during this period. Water levels in the Creede Formation Well, located upslope of the 9360 Adit, have been recorded continuously since its installation, and data for the last year are presented graphically in Figure 1. Flow data for the WGL Weir has been recorded continuously with an automated datalogger since Aprit 17, 2001. Flow data for the WGL Weir are presented in Figure 2. No water quality sample (WGL Weir) or tracer sample (WGLW) was taken in September as the WGL weir was dry. • iiiiiiiiiiiiiii iii No ~~~~~~ ENVIRO AL. HEALTH, SAFETY ~~ ~[~GOVEANfi4EN7 AFFAIRS r~C <dv Or~rsio P~~~/ ~~~ ®~~ ~e /~~ y~re~o ~~ S SY ~e a. Po~.~ ~., HOMESTAKE MINING COMPANY PO, BO%9a ~ GRANTS. NM 8)020-001 ~