2008-12-09_REVISION - M1987038

• Permit No: M1987038
• IBM Index Class Name: REVISION
• Doc Date: 12/9/2008
• Doc Name: Adequacy review
• From: DRMS
• To: Southwest Land Services
• Type & Sequence: AM6
• Email Name: KAP
• 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: [phone]
December 9, 2008
Matt Carnahan
Southwest Land Services
1099 Main Avenue
P.O. Box 2673
Durango, CO 81302
DES ? 2 2008
ovision of Redamebon,
tAlning and Safety
COLORADO
D I V I S I O N O F
RECLAMATION
MILTING
SAFETY
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
RE: Oldcastle SW Group, Inc., dba Four Corners Materials., File No. M-1987-038
. Bayfield Pit No. 1, 112(c) Amendment Application (AM-06) - Adequacy Review
Dear Mr. Carnahan,
Listed below are adequacy review comments for the Bayfield Pit No. 1, 112(c) Amendment Application
(AM-06), File No. M-1987-038. The decision date for this application is January 26, 2009. The
Division of Reclamation, Mining, and Safety (Division) is required to make a decision by January 26,
2009, therefore, your response to the following adequacy review concerns should be submitted to the
Division as soon as possible.
Rule 6.4.4 Exhibit D- Mining Plan
1. The submitted exhibit indicates that water may be encountered in some of the new phases included
in the amendment. Please state at what slope the highwall in these areas will be mined and the
maximum acreage of exposed groundwater expected in these areas. This information is necessary
for calculation of the bond amount.
2. The proposed amendment includes an area along the western boundary of the property where
groundwater is expected to be encountered. Cottonwoods are located along the fence on adjacent
land, which may be impacted by dewatering affiliated with the mining activity in this area. Please
commit to establishing background groundwater levels by collecting at. least five quarters of
groundwater elevations prior to commencement of mining activities in this area of the permit.
Additionally, commit to mitigation measures, to include application of water to the area by the
cottonwoods, should the groundwater elevation fall below a level that could be detrimental to the
condition of the trees. Please include a trigger point that will signal initiation of the mitigation
measures.
Rule 6.4.7 Exhibit G- Water Information
3. The application indicates that the operator will stay within the limits of allowable exposed
groundwater at the site. Please indicate the current acreage of exposed groundwater at the site and
Office of Office of
Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines