PERMFILE130243

• Permit No: M2005045
• IBM Index Class Name: Permit File
• Doc Date: 12/13/2005
• Doc Name: Rock Dog #1 112c Permit Application - Addl. Adequacy Comments
• From: DMG
• To: Mat Carnahan
• Media Type: D
• Archive: No

STATE OF COLOIZ~DO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman 8[., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
December 13, 2005
Matt Carnahan
Gravel, LLC
47 Pinnacle View Dr.
Durango, CO 81301
(COLORADO
DIVISION OF
MINERALS

GEOLOGY

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RE: Gravel, LLC, File No. M-2005-045
Rock Dog #1 112(c) Permit Application- Additional Adequacy Comments
Dear Mr. Carnahan,
Listed below are additional adequacy review comments for the Rock Dog #1 112 (c) Pemlit Application, File No. M-
2005-045, regarding the geotechnical stability analysis. The Division of Minerals and Geology ("Division") is under
the same time constraints stated in the December 2, 2005 Second Adequacy Cotnment letter, therefore your response to
the following adequacy review concern should be submitted to the Division as soon as possible.
1. Division staff has attempted to review the Geotechnical Stability report submitted by the applicant, regarding
the slope on which the access road is to be constructed. The table of contents of the geotechnica] report shows
that there is a "Test Boring Location Sketch" included in the report. The materials submitted, however, do not
contain this sketch. In order for Division staff to conduct an independent slope stability analysis, the Test
Boring Location Sketch is necessary. Please supply this sketch.
2. Division staff has determined that a design for the road will need to be submitted to the Division prior to road
construction. In that the access road is a critical feature of the mining operation, and actual mining operations
cannot commence at the site prior to the installation of this roadway, the Division will need to review this
design prior to approval of the permit.
Please be aware that due to the slope conditions at the site, the Division will likely require periodic inspections during
construction of the roadway by a geotechnical engineer, and notification from the operator to the Division of the road
construction schedule so that the Division can do at ]east one inspection during road construction. There may also be a
requirement for the operator to commit to providing an as-built report for the road. These issues, if they become a
requirement of the permit, will be addressed in a stipulation to the approved permit.
Please be awaze that response to this issue falls under the same deadline as those contained in the second adequacy
review letter.
[f you have any questions, please do not hesitate to call me at [phone].
Sincerely,
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Kate Pickford
Environmental Protection Specialist
cc: Harry Posey; DMG
Office of Office of Colorado
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