REV17123

• Permit No: C1982056
• IBM Index Class Name: Revision
• Doc Date: 8/28/2006
• Doc Name: Adequacy Letter
• From: DRMS
• To: Twentymile Coal Company
• Type & Sequence: MR210
• 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]
COLORADO
D I V I S 1 0 N O F
RECLAMATION
MINING
- &-
SAFETY
August 28, 2006
Bill Owens
Governor
Jerry Nettleton Russell George
Twentymile Coal Company Eaetutive Director
29515 Routt County Road No. 27 Ronald W. Cattany
Oak Creek, CO 80467 Division Director
NaNral Resource Tmstee
Re: Foidel Creek Mine (Permit No. C-1982-056)
Minor Revision No. 06-210 (MR- 210)
Technical Adequacy
Dear Mr. Nettleton:
Please address the following technical adequacy items that relate to the subject minor revision application.
Item 1. Rules 4.05.2(6), 4.05.2(7), and 4.05.16(4). Please include a reference to the number and provisions of
the Colorado Division of Public Health and Environment permit that permits the tank overflow discharge
at the surface.
Item 2. Rule 2.05.3(3)(a). Pease include, on drawing Map EX49A-M5, the overflow line from the tank to
the sedimentation pond.
Item 3.. Rule 4.05.6(3)(a). Please include the maximum discharge (quantity) of the overflow line to the
(containment) sedimentation pond with a demonstration that the pond as constructed is capable of
handling the discharge. Inclusion (also) of the maximum discharge rate is recommended in the event that the
pond is redesigned as a treatment pond [see Rule 4.05.6(3)(a)].
Item 4. Rule 4.05.2(8). Please indicate compliance with this rule (pH) in the revised pages of the
application. [t might be appropriate to reference the permit of Item I.
Item 5. Rule 4.05.16(3). Please update Map 16 and associated text to indicate current and proposed
management of water.
Item 6. Rule 4.05.16(6). Please include text to the effect that the water management system meets with the
approval of the Mine Safety and Health Administration.
Please request an extension to [he due date for a decision on this minor revision application so as [o provide the
Division with ten working days after receipt of a response to this adequacy letter. Please contact me if you have
any questions.
Yours truly,
~~
Byron G. Walker
rnviranmental Pratectian Spec'~li~t
Office of ClfBce of
Mined Land Reclamation Active and Inactive Mines