GENERAL32879

• Permit No: M1980244
• IBM Index Class Name: General Documents
• Doc Date: 7/6/1994
• Doc Name: CRESSON PROJECT PN M-80-244 COMMITMENT 33 SPECIFICATIONS UNDERDRAIN PIPE BACKFILL SOURCE
• From: CRIPPLE CREEK & VICTOR GOLD MINING CO
• To: DMG
• Media Type: D
• Archive: No

//~~ Cripple Creek & Victor Gold Mining Company III IIIIII~IIIIII'll
l\ ~ A Joint Venture -Pikes Peak Mining Company, Manager
"~~(}// "~~// Operatlone Office Englewood Office
[`~x~ P.O. Box 191, 2755 State Highway 67 5251 DTC Parkway. Suite 700, Englewood
Victor, Colorado 80860 Colorado 80111
[phone] • FAX [phone] [phone] • FAX [phone]
July 1, 1994
SENT BY FACSIMILE
ALSO SENT BY OVERNIGHT MAIL -CERTIFIED RETURN RECEIPT REQUESTED
Mr. Berhan Keffelew
Environmental Protection Specialist
Colorado Department of Natural Resources
Division of Mines and Geology
Office of Mined Land Reclamation
1313 Sherman Street, Room 215
Denver, Colorado 80203
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Reference: Cresson Project: Permit Number M-80-244: Commitment Number "33"
(Specifications) - Underdrain Pipe Backfill -Source.
Dear Mr. Keffelew:
Pursuant to the approved application for Amendment Number 6 to the subject permit and Cripple
Creek & Victor Gold Mining Company's ("CC&V") commitment number "33" thereto, the
following additional information and request for concurrence is presented to the Office of Mined
Land Reclamation by CC&V. Commitment number 33 reads:
33. "Design and specification changes, ar defined in Section 6.05 of the CQA plan and
technical specifications, shall only be made with written agreement of the OMLR. "
On June 1, 1994, while your Office staff met with us at the "pre-construction meeting," we
discussed a number of items, one of which was the use of the Gold Star rock material in the leak
collection system beneath the pregnant solution section of the valley leach facility. It was agreed
that the Pad f12 material would be a more suitable source for the valley leach facility leak
collection system. The Gold Star Pit material was also destined for both the leak detection
trenches and the bedding for the underdrain pipe. In our letter to you dated ]une 19, 1994, we
reconfirmed our proposal to use of the Gold Star Pit material in the leak detection trenches. To
date we have not addressed its use as pipe bedding and pipe cover in the underdrain.
Subsequent assessments of the Gold Star Pit material for the underdrain suggests that it may be
equally or more suitable to use the granitic material described in another of our letters dated