REV02659

• Permit No: C1980001
• IBM Index Class Name: Revision
• Doc Date: 1/15/1993
• Doc Name: EDNA MINE C-80-001 PR 03
• From: DMG
• To: CIVIL DESIGN CONSULTANTS INC
• Type & Sequence: PR3
• Media Type: D
• Archive: No

DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, CO 80203
Phone: f 3031 866-3567
FAX: [phone]
January 15, 1993
Allen Fox
Civil Design Consultants, Incorporated
405 South Lincoln Avenue
Steamboat Springs, Colorado 80477-5167
RE: Edna Mine (C-80-001)
Permit Revision 03
Dear Mr. Fox:
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Roy Romer
Governor
Michael B. Long
Division Director
The Division received your comments concerning the above mentioned revision. Enclosed
please find a copy of a letter addressed to the Pittsburg & Midway Coal Mining Company
(P&M), operator of the Edna Mine. In addition to the requirements addressed in my letter
to P&M, the Rules and Regulations of the Colorado Mined Land Reclamation Board require
that P&M protect the essential hydrologic function of alluvial valley floors. The essential
hydrologic function of an alluvial valley floor includes quantity and quality of surface and
ground water.
The tipple and loadout facilities at the Edna Mine were constructed prior to the 1977 Surface
Mining Control and Reclamation Act. Surface water runoff from these areas is currently
routed through a series of four sedimentation ponds. Discharge from the ponds is required to
meet water quality standards established by the Colorado Department of Health (CDOH). To
date, the ponds have discharged in compliance with those standards. At the close of mining,
P&M will be required to restore the alluvial valley floor to its condition prior to 1977. There
is currently no additional disturbance planned in the Oak Creek alluvial valley floor.
Declassification of the alluvial valley floor status would waive the requirement that P&M
restore all of the essential hydrologic function of Oak Creek. However, P&M would be
required to conduct mining and reclamation operations so as to minimize disturbance to the
hydrologic balance in the area, and to prevent material damage outside the permit area.