2011-08-10_REVISION - M1978210

• Permit No: M1978210
• IBM Index Class Name: REVISION
• Doc Date: 8/10/2011
• Doc Name: Adequacy Review
• From: DRMS
• To: Weld County
• Type & Sequence: TR3
• Email Name: MAC
• 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]
August 10, 2011
Clay Kimmi
Weld County - Public Works Dept.
1111 H Street
P.O. Box 758
Greeley, CO 80632
Dear Mr. Kimmi,
Mined Land Reclamation
STATE OF COLORADO
COLORADO
D I V I S I O N O F
RECLAMATION
MINING
— &—
SAFETY
John W. Hickenlooper
Governor
Mike King
Executive Director
Loretta E. Pineda
Director
RE: Geisert Pit; DRMS File No. M- 1978 -210; Technical Revision — 03; Adequacy Review
The Division of Reclamation, Mining and Safety (Division) has completed its adequacy review
of your Technical Revision to the above referenced permit. The Technical Revision was received
and called complete for review on August 1, 2011. The decision date for this application is
August 31, 2011. Please be advised that if you are unable to satisfactorily address any
concerns identified in this review before the decision date, it will be your responsibility to
request an extension of the review period. If there are outstanding issues that have not
been adequately addressed prior to the end of the review period, and no extension has been
requested, the Division will deny this application.
1. The Applicant has indicated clay borrow material will be imported from offsite and used to
backfill the slurry trench. Construction Materials Rule 3.1.5(9) states that if an Operator
intends to backfill inert structural fill generated outside of the approved permit area, it is the
Operator's responsibility to provide the Office notice of any proposed backfill activity not
identified in the approved Reclamation Plan. In accordance with Rule 3.1.5(9), the Operator
shall submit signed affidavit certifying that the material is clean and inert.
2. The Site Plan Map shows a water line will bisect the slurry wall at two points. Please
describe the techniques which will be used to prevent groundwater seepage around the water
line. In addition, please provide the Division with a typical design drawing showing the
crossing of the water line.
3. Please commit to providing the Division with a final construction report detailing the
installation of the slurry wall, describing any problems that occurred, and listing the results of
testing that was conducted under the approved quality assurance /quality control plan.
Office of Office of
Denver • Grand Junction • Durango Active and Inactive Mines