2011-06-06_REVISION - M1981185 ‎(5)‎

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 6/6/2011
• Doc Name: Response to adequacy issue #1 ‎(CN-01)‎
• From: R Squared Inc.
• To: DRMS
• Email Name: WHE
• Media Type: D
• Archive: No

R 21NCORPORATED
ENVIRONMENTAL AND ENGINEERING SERVICES
STRATEGICALLY POSITIONED-TECHNICALLY PREPARED
June 6, 2011
Mr. Wallace Erickson
Department of Natural Resources
Division of Reclamation Mining and Safety
1313 Sherman Street, Suite 215
Denver, Colorado 80203
Re: Fourth Adequacy Response
112(d)-1 Application, Amended CN-01
Wildcat Mining Corporation
May Day Idaho Mine Complex, File No. M-1981-185
Dear Mr. Ericson,
GEORGE M.L. ROBINSONY.G.
1. ERICH RAUBERY.E.
rtree{v
Division of Reclamation,
Mining and Safety
The following responds to your letter Dated May 27, 2011, regarding the Wildcat Mining
Corporation (Company) 112(d)-1 Permit Application. For your convenience, I have restated the
Division of Reclamation, Mining and Safety's (DRMS or Division) adequacy issue, and then
provided the Company's response.
Adequacy Issue #1
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-Ol."
Response #1
The Company's response to Mr. Cazier's May 25, 2011 Memorandum is presented at
Attachment A to this CN-01, Fourth Adequacy Response. Additional portal repair
comments identified by Mr. Cazier in his March 11, 2011 memorandum are addressed in
Attachment I (Collapsed Portal Corrective Action Plan, May Day No. 1) to the Company's
CN-01, Third Adequacy Response.
The slope above the Chief Portal will be stabilized using a steel/timber sets above the Chief
Portal Entry. Rock will be placed above the steel/timber sets to stabilize the slope above
the portal. In addition, and discussed in other sections, a 60-inch CMP pipe will be
installed in the portal as an entry for ventilation and to be used as a escape man way. The
pipe will extend into the portal to a length three feet beyond the loose colluvial material and
extend approximately five feet beyond the entry. The CMP pipe will be stabilized and
"Strategically Positioned - Technically Prepared"
5555 DTC Parkway Suite A-4000, Greenwood Village, Colorado 80111
Phone: [phone] Fax: [phone]