2009-09-02_REVISION - C1980007

• Permit No: C1980007
• IBM Index Class Name: REVISION
• Doc Date: 9/2/2009
• Doc Name: Review Assistance Request ‎(Email)‎
• From: Dan Hernandez
• To: Marcia Talvitie
• Type & Sequence: TR118
• Email Name: TAK
• Media Type: D
• Archive: No

Division of Reclamation, Mining and Safety
Durango Field Office
691 County Road 233, Suite A 2
Durango, Colorado 81301
Tel: [phone]
Fax: [phone]
From: Hernandez, Daniel
Sent: Wednesday, September 02, 2009 7:45 AM
To: Brown, Sandy
Cc: Kaldenbach, Tom; Talvitie, Marcia; Berry, David
Subject: FW: Review assistance request, West Elk Mine (C-80-007), TR-118
Hello Sandy -
On Tom's behalf, I am requesting Marcia's assistance in the review of Mountain Coal Company's Technical Revision TR-
118 for the West Elk Mine. Tom describes the TR in his e-mail below. In conjunction with his adequacy review, Tom
identified certain geotechnical engineering issues in the application (also described below) that require Marcia's
expertise. Our deadline to mail out the TR-118 adequacy letter is Fri Sept 11.
Thanks,
Dan
Daniell. Hernandez
Daniel I. Hernandez
Senior Environmental Protection Specialist
Colorado Division of Reclamation, Mining and Safety
1313 Sherman St, Room 215
Denver, CC 80203
New Phone Number: 303-866-3567 ext 8126
Fax: [phone]
Website: www.mininq.state.co.us
From: Kaldenbach, Tom
Sent: Tuesday, September 01, 2009 4:00 PM
To: Hernandez, Daniel
Subject: Review assistance request, West Elk Mine (C-80-007), TR-118
Dan,
I request Marcia Talvitie's geotechnical review assistance on TR-118, which we found complete on August 14, 2009. 1
request her review of slope stability topics for compliance with Rules 4.10 (Coal Mine Waste) and 2.05.3(3) (Mine
Facilities).
TR-118 proposes to:
1) Build a coal wash plant and office/lab building on top of the Lower Refuse Pile (LRP),
2) Add a 5,000-ton temporary coal stockpile on top of the LRP,
3) Build conveyors to support the prep plant.
Coal waste disposal into the LRP ended several years ago. Since then, the top surface of the LRP has been used for mine
equipment storage, as approved by DRMS.
I have discussed with Kathy Welt at West Elk the possible need to submit a PE-certified slope stability analysis
demonstrating the minimum 1.5 FOS will be maintained with the new construction on top of the LRP. The base of the
LRP is about 100 feet from Highway 133.
2