REV101931

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 8/12/1985
• Doc Name: MINOR REVISION MT GUNNISON NO 1 MINE FILE NO C-007-80
• From: MLRD
• To: ANACONDA MINERALS CO
• Type & Sequence: HR4
• Media Type: D
• Archive: No

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Ir~;~ .~,x ~p~1 DEPARTMENT OF NATURAL RESOURCES
l a ~ , i.,,l fJ David H. Getc hes. Executive Direclol
--- i MINED LAND RECLAMATION DI\
x_~R 76~ DAVID C. SHELTON, Director
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August 12, 1985
Ms. Paige Beville
Anaconda Minerals Company
555 - 17th Street
Denver, CO 80202
RE: Minor Revision, Mt. Gunnison No. 1 Mine, File No. C-001-80
Dear Ms. Beville:
The Division has completed its review of your minor revision application
concerning the addition of 4 to 8 groundwater monitoring wells submitted
July 15, 1985.
We are approving the revision with the following stipulations:
1. One copy of the following must be submitted within 30 days after each
calendar year to the BLM Chief Branch of Solid Minerals:
A. Lithologic and any other logs of strata penetrated and conditions
encountered.
B. Drill hole location map showing exact hole locations, each hole
being appropriately identified by number or letter with the data
being tied to such number or letter designation.
C. List of hole numbers and depth drilled.
2. All ground water monitoring wells must be completed and cemented so as
to isolate all aquifer intervals which show significant head
differences or changes in water quality in order to prevent mixing of
unlike waters.
3. All wells must be completed and abandoned in accordance with applicable
]aws of the State Engineer's Office.
4. Upon final abandonment of the wells, all water bearing zones shall be
sealed with a cement plug beginning 20 feet below the zone and ending
20 feet above the zone, or the entire well can be sealed with cement
from the bottom to within 3 feet of the surface.
5. Dry holes or holes sealed in intervals shall be permanently plugged
with an expanding plug placed 10 feet below ground level followed by 7
feet of cement.
6. The top 3 feet of casing shall be removed and the area filled with soil
durig final abandonment.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]
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