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GENERAL44484
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Entry Properties
Last modified
8/24/2016 8:13:16 PM
Creation date
11/23/2007 1:04:24 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
General Documents
Doc Date
7/30/1997
Doc Name
GEOTECHNICAL REPORT SYLVESTER GULCH SITE DEVEOLPMENT 7/21/97 - 7/27/97
From
MOUNTAIN COAL CO
To
MLR
Permit Index Doc Type
EXPLORATION
Media Type
D
Archive
No
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_` <br />~- <br />Mountain Coal Company <br />West Elk Mine <br />Post Office Box 591 <br />Somerset, Coloredo 87434 <br />Telephone 970 929-5015 <br />Fax 970 929-5595 <br />July 30, 1997 <br />Mr. Michael P. Boulay <br />Dr. Jim Pendleton <br />Colorado Division of Minerals & Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />~II II~~I~~I~~~~~ ~I~ <br />999 <br />RECEIVED <br />JUL 3 0 1881 <br />Division of Minerals & Uaology <br />Re: Geotechnical Report -Sylvester Gulch Site Development <br />Ref: Permit Revision 07 and Technical Revision 79 to Permit No. C-80-007, <br />West Elk Mine <br />Dear Mr. Boulay and Dr. Pendleton: <br /> <br />The following presents Mountain Coal Company's (MCC) current summary of geotechnical <br />issues for the Sylvester Gulch Site Development Project, as required by Permit Revision 07. <br />Although not required, similar related information pertaining to the Refuse Pile Expansion (RPE) <br />project (TR79) and various Minor Revisions are also included. The following information covers <br />the time period from July 21, 1997 -July 27, 1997. <br />General Construction Summary <br />Construction of the RPE Pond (TR79) remains at 95% complete. Excavation of Phase 1C and <br />Phase 1D and creation of structural fill via screening operations continues. Construction of the <br />Pond SG-1 embankments and filling of the shaft bench areas is in progress. Installation of the 96" <br />x 57" arch culvert for the West Fork of Sylvester Gulch is complete. Backfilling of the foundation <br />of the Plate Arch culvert for the main Sylvester Gulch crossing was completed. Construction of <br />the Landing #2 light-use road is complete. Removal of the majority of fill material from the <br />failure area is complete. Rough excavation of the Electric Borehole Road has begun. Light <br />afternoon and evening rains occurred at the site Tuesday, Wednesday and Saturday. <br />Field Monitoring and Observations <br />RPE: Site lines for completed slope excavations (south slope) for Phase lA and 1B were <br />observed on Friday, July 25, and no movement was detected. Phase 1 C cut slopes (in <br />progress) are dry and stable. <br />
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