2009-03-27_REVISION - C1982056

• Permit No: C1982056
• IBM Index Class Name: REVISION
• Doc Date: 3/27/2009
• Doc Name: Adequacy Concerns
• From: DRMS
• To: Twentymile Coal Company
• Type & Sequence: TR66
• Email Name: JHB
• 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]
March 27, 2009
Mr. Jerry Nettleton
Environmental Supervisor
Twentymile Coal Company
29515 Routt County Road 27
Oak Creek, CO 80467
Re: Foidel Creek Mine, Permit No. C 1982-056, TR66 Adequacy Concerns
Dear Mr. Nettleton:
COLORADO
D I V I S ION OF
RECLAMATION
MINING
SAFETY
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
The Division has reviewed Twentymile Coal Company's application for a technical revision (TR66) for installation
of ventilation and escape shafts for the Western Mining District. The application was detailed and thorough. The
Division has identified a few items that need additional information or correction. Please provide the information
requested to the following concerns:
1. TCC's RCE: Proposed page 2.05-45.5g indicates that TCC will re-use the Mine fan, fan shroud and silencer
currently in place at the EMD vent shaft for the WMD ventilation facilities. Therefore, additional
demolition costs will not be calculated for those items that have previously been included in the reclamation
cost estimate (RCE). However, it appears additional facilities will be constructed at the WMD that will not
be brought from the EMD location.
a) Please include additional costs for demolition of an equipment building, fan heaters, hoist, hoist
building, skid mounted compressor and Nitrogen generator, transformer, propane tank and concrete
tank saddles, and an 8ft. diameter culvert at the MAC borehole (proposed page 2.05-45.5g and 2.05-
45.7)
b) Please include costs for reclamation of the sediment pond.
2. Table 49A had topsoil stockpile volume change approved with MR236. Please resubmit a revised Table
49A that incorporates the approved changes from MR236 as well as the changes proposed with TR66.
3. Exhibit 6R "18-Left Mine Ventilation Shaft Installation Cultural Resource Investigations" section VI. Item
no. 27 references the "pipeline" and staging area. TR66 addresses the location and installation of the 18-
Left ventilation shaft & hoist. No reference is made any where else in the application regarding a pipeline.
Please clarify which pipeline is referenced. If a cultural survey was conducted in anticipation of future
pipeline in the area, please state this so it is clear which pipeline is referenced.
4. Proposed page. 2.04-81.2 provides a discussion regarding historic lek mapping. This mapping identifies
one Columbian Sharp-tail Grouse lek within 1200 ft. of proposed disturbance and one Sage Grouse lek
within 3200 ft. of disturbance. The text states that TCC will consult with Colorado Division of Wildlife
(CDOW) to determine if leks are actively utilized and develop a mitigation plan with CDOW if they are.
Please provide information regarding the communication and/or concurrence from CDOW.
Office of Office of
Mined Land Reclamation Denver • Grand lunction • Durango Active. and Inactive Minec