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<br />i~ <br />• III IIIIIIIIIIIIIIII • <br />ROY R. CELLAN ~ ~ <br />- - _ <br />~ m <br />CORPORATE MANAGER <br />RECLAMATION TT <br />4~• ~ ;7; p~.-, <br />;~ <br />- • v"~ <br />, <br /> • I! f~-.LFJ 'a.` <br />Vic. /~ <br />February 22, 2000 -~-.';o <br /> ~ <br /> ` C ria;~ '_~--- <br />State of Colorado 1 <br />~ <br />Division of Minerals a nd Geology ~ <br />: <br />_ <br />Durango Field Office gU ~7pnr {dTl,r q <br />~ <br />701 Camino Del Rio, Room 125 <br />Durango, CO 81301 <br />Attn: Mr <br />ENVIRONMENTAL, HEALTH. SAFETY <br />ANO GOVERNMENT AFFAIRS <br />~~~° <br />Receive~IFe ~i~~~ <br />r ~, <br />7•~~--Y:t • LrU~r ~ <br />_• ..N~;re~~d G~ <br />b~ranyt,~;-1~;0`t;c~ <br />Steve S. Shuey, Reclamation Specialist ~w(tsfonofft~ino,a;;gCL~~6(•'y <br />Uoc- ~/awr.2 ; <br />RE: Bulldog Mine Reclamation Project .lanuary, 2000 Monthly Monitoring Report <br />Dear Mr. Shuey: <br />Pursuant to the Technical Revisions to the Reclamation Permit for the Buildog Reclan~:atiort <br />Project, this is the twenty-sixth monthly report pertaining to 11 installation arld operation of an <br />infiltration trench to accommodate seepage front the 9360 adit, and 21 closing the valve at the <br />9360 adit plug. The Division of Minerals and Geology (DMGI. in a letter dated PAarrh 8, 1999. <br />issued a conditional approval for Homestake Mining Company (HMCI to close the valve at the <br />9360 adit plug. Subsequent to DMG's approval, HMC closed the valve to the adit piug nn A,:r~l <br />1, 1999. Since closure of the adit plug valve, no flow was directed irc~a the ir,i~liretir.,l tren,:'t. <br />Monitoring of the hydraulic conditions behind the adit plug indicated that a:. cf ^.ug;:st 2F, 199°, <br />conditions had stabilized (ie pressure measurements stabilized). As s rPS!.•It. DRAG appruvHrf <br />initiation of the planned tracer test (Ref' Letter from WMCI to Mr. Steve Sfruey, dated Acy~st <br />27, 19991. The tracer test subsequently began on September 9, 199. Nlith the init~atiorr of <br />the tracer test, HMC is committed to the monitoring summarized in Table 'I in accrdance with <br />the approved Technical RP. VISIanS. <br />The revised monitoring program was initiated irr September 1999. A sum~trary of 'the monthly <br />monitoring data is presented in Table 2. Based oit the required visual inspection around the adit <br />plug, the plug is impounding water behind it with no signs of seepage and/or de~~elopment of <br />seeps around the portal area. No flow was observed in DT-1 or DT-2 during the munthiy <br />sampling activities. Windy Gulch was either frozen or dry in all observed reaches, including the <br />9700 Weir and the WGL Weir. As a result, no water or charcol samples were collected for <br />tracer analysis during this period. <br />As part of this monthly report and In accordance with the 9360 Level Adit Closure Monitoring <br />Plan, dated April 1998, Windy Gulch monitoring was continued during this perrod. Significant <br />freezing of Windy Gulch was observed in early November 1999. Consequently, the <br />instrumentation recording flow measurements at the WGL Weir was removed to prevent damage, <br />and continuous flow monitoring, initiated in April 1999, was discontinued for the winter. As <br />such, a water quality sample and record of flaw rate were not taken at the WGL Weir during this <br />period. Water levels in the Creede Formation Well, located upslope of the 9360 Adit, have been <br />recorded continuously since its installation, and data for the last year are presented graphically in <br />Figure 1, <br />HOMESTAKE MINING COMPANY <br />P.O BOX 98 • GRANTS. NM B10P0.00n <br />