2012-01-20_HYDROLOGY - P2011030

• Permit No: P2011030
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/20/2012
• Doc Name: Approval of Water Quality Commitments
• From: DRMS
• To: Greg Lewicki and Associates, PLLC
• Permit Index Doc Type: Hydrology Report
• Email Name: RCO
• Email Name: SSS
• 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]
January 20, 2012
Greg Lewicki
Greg Lewicki and Associates, PLLC
11541 Warrington Court
Parker, CO 80138
Dear Mr. Lewicki,
Office of
Mined I and Reclamation
STATE OF COLORADO
RECEIVED
of F::';;1 unation,
S.,tety
Re: Revenue Mine Exploration, NOI P- 2011 -030, Approval of Water Quality Commitments.
COLORAD
D I V I S I O N O F
RECLAMATION
MINING
— &—
SAFETY
John W Hickenlooper
Governor
Mike King
Executive Director
Loretta E. Piiieda
Director
Thank you for arranging the telephone conference on January 5, 2012, that included you, Rory Williams
of Silver Star, Eric Oppelt of WQCD, and Steve Shuey and myself of DRMS, in order to discuss the
Revenue Mine's existing hydrologic setting and the future water quality concerns, and the possible need
for a CDPS permit. Thank you also for providing the written commitments that the project proponents
will follow, and the numerous water quality reports dating from 1983 through 2000.
After discussing the proposed activities at the Revenue Mine, and reviewing the past water quality reports
and commitments, this office is satisfied that your proposed exploration project may proceed, according
to the following parameters:
1. Water will be sampled weekly for changes in flow, and monitored for visible changes in turbidity
during each day of onsite activity.
2. Water will be sampled quarterly from each of the approved sampling locations (surface and
underground), and the lab results sent promptly to the Division. The approved sampling schedule
and suite of analytes will continue until a change has been approved by the Division.
3. Surface and underground water conveyance and retention structures, such as ditches, pipes, ponds
or sumps, will be monitored and maintained as needed to ensure that sediment transport is
minimized.
4. Surface drilling and underground drilling may occur, using the equipment described in your
January 6, 2012 letter, and/or described in the NOI application materials and approved by the
Division.
5. Surface drill holes will be plugged and abandoned according to the approved reclamation plan.
6. Underground (in -mine) drill holes that are dry will be plugged and abandoned according to the
approved reclamation plan.
7. In -mine drill holes that produce water will be sealed and plugged properly with the cement grout
or other means necessary to prevent degradation of water quality. Bore hole sealing will occur
promptly after procurement of core samples. Proper sealing and plugging materials and
equipment will be kept onsite if such need arises, and a report of such bore hole closures will be
filed timely with the Division. (Please ensure that all drill holes that are closed are reported as
Office of
Denver • Grand Junction • Durango Active and Inactive Mines