REV91022

• Permit No: C1981033
• IBM Index Class Name: Revision
• Doc Date: 2/13/1985
• Doc Name: MEMO BEAR MINE SUBSIDENCE MONITORING
• From: MLRD
• To: SUSAN MOWRY
• Type & Sequence: MT1
• Media Type: D
• Archive: No

Richard D. Lamm
Governor
•
DEPARTMENT OF NATURAL RESOURCES
Davitl H. Getches, Executive Director
MINED LAND RECLAMATION DI\
DAVID C. SHELTO N, Director
MEMORANDUM
13JFebruary 1985
T0: Susan Mowry ,...-~
FROM: Jim Pendleton
RE: Bear Mine - Subsid ce Monitoring
Pursuant to your request, I have reviewed the 1983/1984 subsidence monitoring
survey results submitted by E. Leroy Black of UTE Engineering, Inc. for the
Bear No. III coal mine. The survey results appear to be properly prepared and
presented within Mr. Black's letter report.
However, while reviewing the letter report, I referenced the mine file
documentation, in order to refresh my memory of events relating to approval of
the subsidence monitoring program. I determined that Stipulation No. 15,
placed upon the Permit approval, required the submittal of an acceptable
subsidence monitoring program plan. The revised permit findings document,
dated May 10, 1982, required submittal of the proposed plan within 30 days
following permit approval. On September 29, 1982 Bear Coal Company submitted
a proposed subsidence monitoring program, in response to Stipulation No. 15.
On November 3, 1982, Dan Mathews responded to the company, attaching my
memorandum of review dated October 19, 1982. Both Dan's cover letter and my
memo indicated that the Division was prepared to approve the plan, if the
Company agreed to the installation of two monuments, in addition to those
originally proposed within their plan. I can find no response from the
company either agreeing or disagreeing with that request. Therefore, I can
only assume that Bear Coal Company has never received approval for its
subsidence monitoring program.
The original concern voiced by the Division within the findings document was
that the slope stability of ancient and modern landslides overlying the
workings might be affected by ground subsidence above the coal mine workings.
The purpose of the two additional monuments was to specifically monitor
possible movement of two of the identified landslide bodies. I continue to
believe this task to be important and recommend that we contact Bear Coal
Company and require them to complete resolution of the outstanding subsidence
monitoring program.
cc: Bob Liddle
Document No. 7759E
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]
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