2010-03-11_PERMIT FILE - M2008012

• Permit No: M2008012
• IBM Index Class Name: PERMIT FILE
• Doc Date: 3/11/2010
• Doc Name: Application preliminary adequacy review
• From: DRMS
• To: BCI Engineers and Scientists
• Email Name: GRM
• 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: (303) 832-$106
DATE:
TO:
FROM:
RE:
10 March 2010
Russ Means
David Bird
COLORADO
D IV IS I ON OF
RECLAMATION
MINING
SAFETY
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
Review of 112d Conversion Application and Environmental Protection Plan for
Nuvemco, LLC - Last Chance Mine
The Division of Reclamation, Mining, and Safety (DRMS) geochemist has completed a review of the I I2d
Conversion Application and Designated Mining Operation Environmental Protection Plan for the Nuvemco,
LLC Last Chance Mine. DRMS has the following additional adequacy concerns:
Appendix E. Ground Water Monitoring
There were no completion diagrams or location map immediately apparent for the monitoring wells. Also, a
geologic cross-section should be provided to allow visualization of the location and depths of the monitoring
wells with respect to the geologic formations.
DRMS response: For all wells on the property, please provide completion diagrams, well logs,
location maps, and a geologic cross-section showing the completion of the wells with respect to the
underlying geology.
Exhibit G. Water Information
The application states that no ground water has been encountered in existing shafts at the Last Chance
Mine and that the Mesa has historically had dry mines. The application also states that "limited water
which may exist in abandoned mines is from open shafts, vents or drill holes which were not properly
abandoned."
DRMS response: The mining plan does not provide sufficient details to indicate whether the workings
will gain sufficient length and depth to perhaps intercept ground water. Please provide the anticipated
mine plan and the maximum depths and lengths of expected mine workings. The depiction of the
workings would be useful plotted on a geologic cross-section.
Exhibit T; Part 1, General Plan
Office of Office of
Mined Land Reclamation Denver • Grand )unction • Durango Active and Inactive Mines