REP22349

• Permit No: C1982056
• IBM Index Class Name: Report
• Doc Date: 7/29/1998
• Doc Name: QUARTERLY INSPECTION REPORT WASTE COAL AREA FOIDEL CREEK MINE ROUTT CNTY COLO
• From: NORTHWEST COLO CONSULTANTS INC
• To: BOWER BROS CONSTRUCTION
• Permit Index Doc Type: Waste Pile/Fill Report
• Media Type: D
• Archive: No

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Geotechnlcsl / Environmennl Engineering • Materials Testing
Subject: Quarterly Inspection Report, Waste Coal
Area, Foidel Creek Mine, Routt County, Colorado.
Ladies & Gentlemen,
July 21, 1998
Bower Bros. Con
595 Taylor Street
Craig, CO 81625
Attn: Mr. Bud Bower
]ob No. 95-2296
RECEIVED
JUL 2 91998
DIV& GEO OGY LS
As requested, Northwest Colorado Consultants, Inc. has prepared this letter outlining our inspections
made during the second quaver of 1998 at the Waste Coal Area, which is located at the Foidel Creek
Mine in Routt County, Colorado.
Our firm visited the project site on May 22 and 29, June 5 and 24, 1998 to inspect the waste coal area
and test the compaction of the waste coal materials being placed. The contractor has placed the majority
of the materials in the central portion of Area ql. A total of l7 compaction and moisture content tests
have been taken on the materials being placed during these visits. The approximate location of the tests
are shown in the attached Figure Nl. Copies of our compaction test results and daily reports are also
attached. It should be noted that the abbreviations given in the Nuclear Density Test Results (Proctor
Data) arc as follows: Maximum DD =Maximum Dry Density and OMC =Optimum Moisture
Content. Both of these values have been determined in accordance with ASTM D698/AASHTO T99.
We also visited the project site on June 23, 1998 and observed the con[ractor's operations and
cons ruction methods, as well as observe the surface drainage characteristics at the site.
Based on the compaction tests taken and our observations made at_the project site, it appears that the
waste coal materials have been placed and compacted in general accordance_with_the project plans and
specifications. However, we did observe some areas, in the south central portion of the waste coal pile,
where ponding of the surface runoff is occurring in adjacent to the stockpiled materials. We advised the
contractor, Bud Bower, that these areas would need to be regraded to prevent ponding on top of the ,~
stockpile. We also reminded Mr. Bower tha[ the fill materials placed in the waste coal pile should be
constructed in such a manner to prevent the surface runoff from flowing over the face of the finished fill ~
slope. The runoff should be directed back away from the finished slope [o the drainage which Flows in a
north and south direction to the ditches at the north end of the pile or to the ditch situated along the edge
of the haul road.

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