PERMFILE100742

• Permit No: M2006009
• IBM Index Class Name: Permit File
• Doc Date: 3/23/2006
• Doc Name: Adequacy Issues
• From: DMG kap
• To: Geological Services
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman SL, Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
March 23, 2006 "
Douglas L. Conger ,~%
Geological Services
711 Hartman Road
Cortez, CO 81321
RE: Adequacy Issues fora 112c Application,
Hindmarsh Sandstone; File No. M-2006-009. ~
Dear Mr. Conger:
COLORADO
DIVISION OF
M[N&RALS
GEOLOGY
REC LAMATION•MI NING
SAfETT~S CIENCE
Bil I Owens
Governor
Russell George
Executive Director
Ronald W. Cottony
Division Director
Natural Resource Trus[ee
The decision date for the above referenced application is May 1, 2006. Please be advised that
the application may be deemed inadequate and may be denied on May 1, 2006, unless the
following adequacy review items are addressed to the satisfaction of the Division.
Adequacy Issues
The application indicates that topsoil is intermittent and too shallow to warrant salvage
for reclamation purposes. However, sufficient soils exist to support the pre-mining
Pinyon/Juniper community and the operator has chosen rangeland post-mining land
use, which requires a final vegetative cover. Please clarify how the operation will
comply with the requirements of Rule 3.1.9. Please clarify how the operation will
attain a rangeland vegetative cover, compliant with the requirements of Rule 3.1.10,
without the benefit of topsoil replacement.
2. Pursuant to Rule 6.4.5(1) and 6.4.5(2)(f)(v), please specify the minimum depth or
range of depths for replacement of topsoil and/or earthen material sufficient to support
vegetative cover. Please ensure that the application clarifies how the anticipated
replacement depth will provide sufficient root depth for the proposed vegetative cover.
The application indicates that explosives will be utilized. Pursuant to Rule 6.4.4(i) and
6.5(4), please submit the appropriate analyses which demonstrate that off-site areas
will not be adversely affected by blasting. DMG recommends that the analyses
address all structures within one mile of the permit boundary.
4. The application indicates that the final slope of the benched 36-foot highwall shall
approximate 0.6H:1 V. Pursuant to Rule 3.1.10(3), final slopes must support
rangeland post-mining land use and shall not be too steep to be traversed by
livestock. DMG recommends 3H:1V slopes for rangeland post-mining land use.
Please clarify how the proposed 0.6H:1V slopes address the requirements of Rule
3.1.10(3).
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geoloeical Survev