1998-08-26_REVISION - M1977493

• Permit No: M1977493
• IBM Index Class Name: REVISION
• Doc Date: 8/26/1998
• Doc Name: Conditional Revision Approval
• From: DMG
• To: Climax
• Type & Sequence: SR2
• Media Type: D
• Archive: No

OF COLORADO
VISION OF MINERALS AND GEOLOGY II I I II I II I II IIII III
Department of Natural Resources 999
131 3 Sherman St, Room 215
Denver,Colorado 80203
Phone [phone]
FAX-[phone] WOA
DEPARTMENT OF
NATURAL
�� RESOURCES
"August 26, 1998 Roy Romer
Governor
James S Lochhead
Mr. Blyce Romig Executive Director
Climax Molybdenum Company Michael B Long
Climax Mine Division Director
Climax, CO 80429 /
RE: Conditional Revision Approval, Climax Mine,Permit No. M-77-493, Revision SR-002
Dear Mr. Romig:
On August 26, 1998 the Colorado Division of Minerals and Geology ("DMG") issued a conditional
approval of Revision SR-002 submitted on November 13, 1997. Revision SR-002 was submitted by
Climax Molybdenum Company ("Climax") seeking the concurrence of the DMG that Eagle Park
Reservoir and 4-Dam meet criteria for an approved post-mining and beneficial land use of developed
water resources. The terms of Revision SR-002 are hereby incorporated into Permit No. M-77-493.
All other conditions and requirements of Permit M-77-493 remain in full force and effect. The
conditions of the approval of Revision SR-002 are listed below.
Condition No. 9
The DMG will hold the option to rescind its conditional finding that post-mining land use of developed
water resources for Eagle Park Reservoir has been achieved if, upon review of the data and
consultation with the Water Quality Control Division ("WQCD"), it is determined that the discharge
results in exceedences of the chronic water quality standards. The conditional finding will become
final based on the acceptance of a report on data gathered over a three-year monitoring period.
The monitoring period will commence with the first release of water and occur during the first three
years of reservoir water delivery.
Data used to judge long-term performance will be obtained by sampling the reservoir at the outlet
works during delivery. Climax will continue quarterly sampling through the fourth quarter of 1998 at
the three established sampling points on the north, east and south shores of the reservoir, and at a
surface and 35 foot depth sample point in the center of the reservoir. During the period of reservoir
water delivery to the east Fork of the Eagle River, a sample will be taken at the outlet works on the
first day, approximately at the midpoint, and near termination of water delivery. Concurrent sampling
in the east Fork of the Eagle River above and below the confluence of reservoir and river waters during