HYDRO31591

• Permit No: M1977215
• IBM Index Class Name: Hydrology
• Doc Date: 12/21/1999
• Doc Name: BULLDOD MR PROJECT NOV 1999 MONTHLY MONITORING REPORT
• From: HOMESTAKE
• To: DMG
• Media Type: D
• Archive: No

HOM~, 'AKE •
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ROY R. CELLAN
CORPORATE MANAGER
RECLAMATION
December 14, 1999
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ENVIRONMENTAL, HEALTH. SAFETY
AND GOVERNMENT AFFAIRS
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State of Colorado
Division of Minerals and Geology
Durango Field Office
701 Camino Del Rio, Room 125
Durango, CO 81301
Attn: Mr. Steve S. Shuey, Reclamation Specialist
RE: Bulldog Mine Reclamation Project
November, 1999 Monthly Monitoring Report
Dear Mr. Shuey:
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Pursuant to the Technical Revisions to the Reclamation Permit for the Bulldog
Reclamation Project, this is the twenty-fourth monthly report pertaining to 1)
installation and operation of an infiltration trench to accommodate seepage from the
9360 adit, and 2) closing the valve at the 9360 adit plug. The Division of Minerals
and Geology {DMG), in a letter dated March 8, 1999, issued a conditional approval
for Homestake Mining Company (HMC) to close the valve 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 was directed into the infiltration
trench. Monitoring of the hydraulic conditions behind the adit plug indicated that as
of August 25, 1999, conditions had stabilized (ie pressure measurements stabilized).
As a result, DMG approved initiation of the planned tracer test (Ref: Letter from
WMCI to Mr. Steve Shuey, dated August 27, 1999). 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 on 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. No flow was
observed in DT-1 during the monthly sampling activities. Minimal flow was observed
in DT-2 and samples taken as shown in Table 2. Completed analyses of the
charcoal and water samples taken during this period as part of tFie tracer test indicate
that no fluorescein dye was detected in any of the samples (see attached Ozark
Underground Lab analytical results).
HOMESTAKE MINING COMPANY
P.O ROX 98 • GRANTS, NM B]02P0011