2011-04-07_REVISION - M1981185 ‎(5)‎

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 4/7/2011
• Doc Name: Phone conversation 04/06/2011 ‎(CN-01)‎
• From: DRMS-WHE
• To: File
• Type & Sequence: CN1
• Email Name: WHE
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1 3 1 3 Sherman St., Room 215 RECEI V C O L O R A D O
Denver, Colorado 80203 D IV IS I ON OF
Phone: [phone] r
APR 18 201 RECLAMATION
MINING
FAX: [phone]
Division or Reclamation, SAFETY
Mining and Safety
DATE: April 7, 2011 John W. Hickenlooper
Governor
TO: May Day Idaho Mine C
CN-01
File omplex, M-1981-185 Mike King
,
, ecutive Director
Ex
Loretta E
FROM: Wally Erickson Director
David Bird
RE: Phone Conversation with George Robinson on April 6, 2011,
Application to Convert a 110(2) Operation to a 112d-1 Operation (CN-01),
May Day Idaho Mine Complex, Permit No. M-1981-185.
On April 6, 2011, at 1410 through 1305 hours, DRMS staff members David Bird and Wally
Erickson participated in a phone conference with George Robinson of R Squared Incorporated.
Mr. Robinson is the permitting agent for Wildcat Mining Corporation's application for CN-01.
The subject of the phone conference was limited to water quality issues for CN-01, and more
specifically some of the adequacy issues raised by Mr. Bird in his technical review memo for CN-
01, dated March 25, 2011.
Mr. Robinson requested DRMS consideration on four primary issues:
1. Regarding no milling activity until hydrologic baseline conditions are determined, Mr.
Robinson proposed to encapsulate mill tailings in cement during the five quarter period
of hydrologic monitoring necessary to determine baseline conditions. The issue of
encapsulating the tails in cement had been previously raised by Wally Erickson during a
March 30, 2011 site inspection with Mr. Robinson.
DRMS staff indicated that such proposal would be considered but made no
commitments to accept or reject such proposal, if and when it was officially presented
as part of CN-01. DRMS also introduced the concept of tailings disposal within the
depths of the mine pool and informed Mr. Robinson that DRMS would consider a
proposal, as subaqueous disposal of tailings is recognized globally as the preferred
alternative over subaerial disposal.
2. Regarding the depth of proposed groundwater monitoring wells, Mr. Robinson
proposed to drill until ground water was intercepted or until the depth of the hole was
equal to the elevation of the La Plata River.
DRMS staff indicated that such proposal would be considered but made no
commitments to accept or reject such proposal, if and when it was officially presented
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