2007-11-26_REVISION - C1980004

• Permit No: C1980004
• IBM Index Class Name: REVISION
• Doc Date: 11/26/2007
• Doc Name: Review and Request Letter
• From: DRMS
• To: J.E. Stover & Associates
• Type & Sequence: MR44
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
November 26, 2007
Jim Stover
J.E. Stover & Associates
P.O. Box 60340
Grand Junction, CO 81506
RE: McClave Canyon Mining LLC, McClane Canyon Mine
Minor Revision Application No. 44 (MR-44)
Sediment Drying Area Expansion
Permit No. C-1980-004
Dear Mr. Stover:
COLORADO
D I V I S I ON OF
RECLAMATION
MINING
SAFETY
B i l l Owens
Governor
Russell George
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
The Division has reviewed the above referenced minor revision application, and we have
the following requests.
1. Please provide an amended Map Figure 2.2-3, updated to include the revised
disturbance boundary and diversion ditch alignment as depicted on amended
Figure 2.2-2.
2. Presumably, the dimensions for "Collector" ditch on page 2 of Table 4.2-13 of the
permit application apply to the ditch that diverts flow around the sediment drying
area and stockpiles. But because the ditch is technically a diversion rather than a
collector ditch, this is not entirely clear. Please amend Figure 2.2-3 and Table
4.2-13, to provide or clarify design specifications for the diversion.
3. It would appear that the relocated upper diversion segment would have a slope of
approximately 15% through a 50 to 60 foot section. Please address design
measures and include documentation of flow velocity to ensure that the new ditch
segment will be erosionally stable.
Please contac e if yo have any questions.
Sincerely,
1
Daniel T. Mathews, Environmental Protection Specialist
C: Denver File
Office of Office of
Mined Land Reclamation Active and Inactive Mines