2009-05-06_REVISION - M2004009

• Permit No: M2004009
• IBM Index Class Name: REVISION
• Doc Date: 5/6/2009
• Doc Name: Second Adequacy Review
• From: DRMS
• To: Asphalt Specialties Co, Inc.
• Type & Sequence: TR3
• Email Name: ECS
• 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]
May 6, 2009
Asphalt Specialties Co, Inc.
Attn: Rob Laird
10100 Dallas Street
Henderson, CO 80033
COLORADO
D I V I S I ON OF
RECLAMATION
MINING
SAFETY
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
RE: File No. M-2004-009; Turnpike Mining Resource; Technical Revision 03 -
Revise Mine Plan and Reclamation Plan configuration, Submitted by Asphalt
Specialties Co., Inc. - Second Adequacy Review
Dear Mr. Laird:
The Division of Reclamation, Mining and Safety (DRMS) has completed its preliminary
adequacy review of the Technical Revision (TR03). The revision was received on March
2, 2009 and called complete for review on that date. The decision date for this revision is
currently May 18, 2009. 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 revision. In general the
submission was substantially adequate; however, as with most revisions there are a few
items that will require the submittal of additional information or clarification of the
existing information. The only remaining comments pertain to the configuration of the
clay liner keyway design, and the submitted reclamation cost estimate.
• The ECC letter included with the TR03 Adequacy Comments states:
"The installation of the core trench will be dependent on field conditions as determined
during construction. The purpose of the deepened core trench is to minimize seepage out
of the reservoir as well as to minimize groundwater inflow into the reservoir. Provided a
slope stability analysis and a seepage analysis indicates a shallower core trench is
feasible and performs as design intended, ECC is not opposed to the minimum 3 foot
depth keyway as suggested by Deere and Ault"
Have any slope stability analyses or seepage analysis been conducted at this time to
demonstrate that the proposed 3foot keyway would meet design standards? What criteria
would need to be satisfied for these tests to show that the 3 foot keyway would be
adequate? Additional information is needed at this point to demonstrate the adequacy of
Office of Office of
Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines