2009-03-06_REVISION - C1981018

• Permit No: C1981018
• IBM Index Class Name: REVISION
• Doc Date: 3/6/2009
• Doc Name: Subsidence Review ‎(Memo)‎
• From: Tom Kaldenbach
• To: Jason Musick
• Type & Sequence: RN5
• Email Name: JDM
• 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]
MEMO
Date: March 6, 2009
To: Jason Musick
/1L
From: Tom Kaldenbach
Re: Deserado Mine (C-1981-018), Permit Renewal RN-05
Subsidence Review
COLORADO
D IV I S 10 N O F
RECLAMATION
MINING
- SAFETY
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
I have reviewed Deserado's permit application for compliance with the subsidence
requirements of 34-33-121(2)(a), 2.05.6(6), and 4.20. The permit application adequately
addresses the general requirements regarding inventory of structures and renewable
resource lands, predicting worst possible subsidence consequences, and providing either
a subsidence survey or a control plan. The permit application needs updating and
clarification as described in the following adequacy comments which may be forwarded
to the operator.
1. Please resolve the apparent discrepancy between page III-9 of the permit
application which refers to County Roads 97 and 73, and Map 1 which shows
County Roads 96 and 78.
2. Please revise Section III.A.Th (Damage Mitigation) so that the daily visual
monitoring requirement of County Road 65 also applies to County Road 96 (or
97, whichever road number is correct).
3. Please update Section III.A.7.a to reflect mining progress. For example, change
the text on page III-9 to say that Hallandras Reservoir has been subsided.
4. Please submit an updated Map 120 showing the current extent of developed
entries and mined longwall panels.
cc: Dan Hernandez, DRMS
Office of Office of
Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines