2007-10-05_REVISION - M1977208

• Permit No: M1977208
• IBM Index Class Name: Revision
• Doc Date: 10/5/2007
• Doc Name: Adequacy Letter
• From: DRMS
• To: CEMEX, Inc.
• Type & Sequence: TR9
• 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]
FA%; [phone]
~ctober 5, 2007
e s ~ ed n~~ ~dz
s. Monica Sowders
~EMEX
P.O. Box 529
Lyons, CO 80540
RE: CEMEX, Inc., Lyons Quarry; Permit No. M-1977-208
~R-09; Adequacy~tter
Deaz Ms. Sowders:
COLORADO
DIVISION OF
RECLAMATION
MINING
- Sc-
SAFETY
Bill Ritter, 7r.
Governor
Harris D. Sherman
Executive Director
Ronald W. Canany
Division Director
Natural Resource Trustee
The Division received Technical Revision (TR-09) for the Lyons Quarry, Permit No. M-1977-208 operated by
CEMEX, Inc. The revision provides the hydrogeologic investigation of C-Pit and recommendations for the
long-term ground water monitoring program. The Division has the following questions that will need to be
addressed prior to approval of the revision:
1. Please find the attached comments regazding the hydrogeologic investigation and changes to the
ground water monitoring program at the site.
2. The report notes the degradation of shotcrete lining within the Boulder Feeder Cana] and possibly
water migrating to the C-Pit as noted by seeps in the highwall and well vegetated azeas. Based on the
report, it appears that water from irrigation ditches aze migrating into the C-Pit. In order to reduce the
water flowing into the C-Pit and coming in contact with the cement kin dust (GIGO), CEMEX will
need to provide a plan to limit the seepage flow of water into the C-Pit.
3. The report indicates that leakage from the A-Pit water line is a possibility due to the past occurrence of
the line breaking and the fact that the highwall in the vicinity of the A-Pit is wet. Please provide a plan
to investigate the condition of the A-Pit water line and a mitigation plan in the event water is migrating
into the C-Pit.
4. CEMEX is required to monitoring wildlife on the site in the vicinity of the C-Pit. Please inform the
Division if the wildlife monitoring and reporting plan will change as a result of the backfilling of a
majority of the pit and the recently installed net on the exposed water in the C-Pit.
Please be advised that Division's decision due date is set for October 10, 2007. If you feel more time is needed
to complete your reply, the Division can grant an extension to the decision date. This will be done upon
receipt of a written waiver of your right to a decision by October 10, 2007 and request for additional time.
This must be received no later than the deadline date. If you have any questions, please contact me at (303)
866-4943.
Si/ncer@]y,
Enca S. Crosby
Environmental Protection Specialist
Enclosure
cc: Carl Mount; DRMS
David Bird; DRMS
~hlNeter~;Brea~3r6eldtvell- --,
Office of Office of
Mined Land Reclamation Denver ~ Grand junction .Durango Active and Inactive Mines