2012-06-28_REVISION - M1980244

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 6/28/2012
• Doc Name: ‎(TR-65)‎ ADEQUACY REVIEW
• From: DRMS
• To: CC&V
• Type & Sequence: TR65
• Email Name: TC1
• Email Name: TAK
• Email Name: BMK
• Media Type: D
• Archive: No

DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
June 28, 2012
Mr. Timm Comer
Cripple Creek & Victor Gold Mining Company
100 N. Third Street
P.O. Box 191
Victor, CO 80860
Re: Cresson Project; DRMS File No. M- 1980 -244;
Technical Revision (TR -65) Adequacy Review
Dear Mr. Comer:
STATE OF COLORADO
4) Drawings A501 and A502 — Related to Item 2 above, Drawing A502, Detail 2 does not show the
placement of CFDM, nor does Drawing A501 appear to show the finish grade elevations of the
CFDM. The intent of the Phase 5 Berm Raise Design is to ensure a potential future spill similar to
the event that occurred the week of April 13, 2012. The Division believes it is important to maintain
Office of Office of
Mined Land Reclamation
COLORADO
D I V I S I O N O F
RECLAMATION
MINING
—&—
SAFETY
John W. Hickenlooper
Govemor
Mike King
Executive Director
Loretta Pineda
Director
The Division of Reclamation, Mining and Safety (Division) has reviewed your June 25, 2012 request for a
technical revision (TR -65), Specification Change in Overburden Fill Testing Frequency and VLF Phase 5
Berm Raise Design. The submittal was called complete for the purpose of filing on June 28, 2012. The
decision date for TR -65 is July 30, 2012. Please be advised that if you are unable to satisfactorily address any
concerns identified in this review before the decision date, it will be your responsibility to request an
extension of the review period. If there are outstanding issues that have not been adequately addressed prior
to the end of the review period, and no extension has been requested, the Division will deny this application.
The following comments are based on the Division's review of the June 25, 2012 Request for Technical
Revision TR -65 and the three drawings submitted with it:
1) Page 1, Specification Change — Based on discussions between CC &V and the Division while the
request for TR -65 was in the mail, the Division will not consider the proposed revised Specification
Change for Overburden Fill Testing Frequency.
2) Third Page/Drawing A502 — The first paragraph states Coarse Free Draining Material (CFDM) will
be installed for additional storage capacity and DCF will be placed or maintained beneath the
CFDM. Neither the text nor Drawing A502 present information on how thick a layer of DCF will be
placed or maintained under the CFDM. The Division is concerned about maintaining the integrity of
the liner during construction and placement of the CFDM. Please specify how much DCF will be
used to protect the liner.
3) Third Page — The paragraph states DCF will not be placed over the newly installed sections of liner.
Please clarify if the intent is to leave portions of the liner exposed. If this is the case, the liner will
need to be periodically inspected to ensure it is not damaged during normal mine operations and
maintenance.
Denver • Grand Junction • Durango Active and Inactive Mines