2011-05-27_REVISION - M1981185

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 5/27/2011
• Doc Name: Fourth adequacy letter ‎(CN-01)‎
• From: DRMS
• To: R Squared Incorporated
• Type & Sequence: CN1
• Email Name: WHE
• 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]
RECEI i7
COLORADO
D IV IS I ON OF
RECLAMATION
MINING
- St-
SAFETY
May 27, 2011
George Robinson
JUN 06 2011
Di%Mion of Reclamation, John W. Hickenlooper
Wining and Safety Governor
R Squared Incorporated Mike King
Executive Director
5555 DTC Parkway, Suite A-4000
Loretta E. Pirheda
Greenwood Village, CO 80111 Director
RE: Fourth Adequacy Letter for a 112d-1 Application, Amended ,FC =01,
Wildcat Mining Corporation, May Day Idaho Mine Complex, File No. M-1981-185.
Dear Mr. Robinson:
Please be advised the amended CN-01 may be deemed inadequate and may be denied on June
21, 2011, unless the adequacy review items listed below, as well as those identified in the
Division's third adequacy letter, dated May 3, 2011, can be addressed to the satisfaction of the
Division. Subsequent to receipt and review of the Applicant's response to these items the
Division may identify additional issues.
In the Division's third adequacy letter, under adequacy item number 17, the Division
indicated additional adequacy issues regarding the proposed plans for repair of the
collapsed portal at the May Day 1 would be forthcoming. Division staff member Tim
Cazier has completed his review of the proposed plans and has provided a review
memorandum, which is attached to this correspondence. Please address the adequacy
issues identified by Mr. Cazier in the attached review memorandum dated May 25,
2011, "May Day & Idaho Mine Complex - Portal Repair Comments to April 18, 2011
Adequacy Responses, Permit No. M-1981-185/CN-01."
2. In the Division's third adequacy letter, under adequacy item number 21, the Division
indicated additional adequacy issues regarding the proposed blasting plan would be
forthcoming. The Division's engineering staff has completed its review of the blasting
plan and has identified the following adequacy issues.
There is discussion in the permit application submittals of blasting in accordance with
the Scaled Distance Equation, but no clear commitment to do so. A clearly worded
commitment must be provided to conduct blasting in accordance with the Scaled
Distance Equation as follows:
The maximum weight of explosives to be detonated within any 8-millisecond period
may be determined by the formula W = (D/Ds)2 where W = the maximum weight of
explosives, in pounds, that can be detonated in any 8-millisecond period; D = the
Office of Office of
Mined Land Reclamation Denver,,! Grand )unction Durango Active and Inactive Mines