GENERAL47018

• Permit No: C1980007
• IBM Index Class Name: General Documents
• Doc Date: 8/12/1983
• Doc Name: Reduction in monitoring response letter
• From: MLRD
• To: BOB LIDDLE
• Permit Index Doc Type: STIPULATIONS
• Media Type: D
• Archive: No

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Ric nar0 D Lamm
Governor

DEPARTMENT OF NATURAL RESOURCES
D Monte Pascoe. Execwrve Director
MINED LAND RECLAMATION DIVISION
DAVID C. SH ELTON, Director
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TO: L13ab Liddle
FRUM: Roy L. Cox
RE:
DATE:
Reduction in Hydrologic Monitoring for the hlt. Gunnison IVo. 1'
Mine, West Elk Coal Company, Anaconda Minerals Company
August 12, 1983
I have completed and reviewed the annual Hydrologic report for the Mt.
Gunnison No. 1 Mine antl the Companies' requested reduction in both
surface and ground water monitoring. Some of the requested reductions
are reasonaole. The following discussion outlines those monitoring
program changes that West Elk coal company should institute to more
efficiently monitor ground antl surface waters, yet gather sufficient data
on the effects of mining and data necessary for future permitting.
Ground Water Quality
West Elk Coal Company may Discontinue the monitoring of ground water
quality in bedrock wells completed in strata overlying the "F" seam
(except in areas of surface disturbances). Wells completed in units
Delow the "F" seam, however, should still be monitored semiannually (June
and October) for the parameters contained on the attached parameter list
(Attachment A).
West Elk Coal Company may discontinue the monitoring of spring and seep
water quality from springs and seeps issuing from rock strata and
unconsolidated deposits above the crop line of the "F" seam (except in
areas of surface disturbances). Springs and seeps located below the crop
line of the "F" seam should still be monitored semiannually (June and
October) for the parameters contained on the attached parameter list.
The justification for the above monitoring changes are that ground water
qualities in rock strata and in spring and seeps located above the "F"
seam crop line will not be effected by the mining except in areas
overlain by surface facilities (i.e. waste rock piles, coal stock piles,
water impoundments, preparation plants, maintenance facilities, etc.).
Ground water qualities in rock strata and springs and seep oelow the "F"
seam and below surface facilities nay de impacted, thus water quality
monitoring is warranted.
423 Centennial Building, t3i3 Sherman Street Denver, Colorado 80203 Tel. [phone]