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REP00633
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REP00633
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Entry Properties
Last modified
8/24/2016 11:29:32 PM
Creation date
11/26/2007 9:43:33 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
7/12/2004
Doc Name
2nd Quarter 2004 Quarterly Inspection
From
Northwest Colorado Consultants Inc
To
Twentymile Coal Company
Permit Index Doc Type
Waste Pile/Fill Report
Media Type
D
Archive
No
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<br />At the time of our visit, we also observed several areas in which a slight amount of water seepage was <br />coming out of the east face of the lower and second benches in Areas 2 and 2%z. We also observed that <br />water was standing/ponding in several areas along the uphill side of the bench that had been constructed <br />across the east face of the pile in Areas 2 and 2'h (see the attached photographs). We recommend that the <br />uphill side of the bench be regraded so that water is not allowed to pond or stand in this area. [n addition, <br />the seepage that is coming out of the east face of the pile will need to be collected and diverted away from <br />the slope face prior to placement of the clay and topsoil cover materials. <br />Based on our observations made along the toe of the north face of Area 1, it appears that the coarse fill <br />materials that had been placed along the toe of the slope are adequately collecting and diverting the <br />seepage, previously observed in these areas, away from the toe of the pile. This portion of the pile appears <br />stable. However, we did observe some slight movement in one area. However, this movement appears to <br />be related to settlement of the fill materials placed in this area (see the attached photographs). <br />As suggested, the water levels in the monitor wells installed on October 23, 1997 and December 9, 1999 <br />were measured during this quarter on a monthly basis. A table/graph showing [he monthly water levels is <br />attached. <br />We were advised that the mine had produced approximately l7, 380 cubic yards of waste coal during the <br />month of April 2004: 34,810 cubic yards during May 2004: and approximately 27,000 cubic yards during <br />June 2004. It is our understanding that the fines being produced at the wash plant, which consists of 10 to <br />20 percent of the total materials being produced, are being pumped underground into the mine. <br />Based on our limited observations, it appears that the pile is currently being constructed in general <br />accordance with the proJec specifications. This report fulfills the quarterly inspection requirements as <br />specified by Rules 4.09.1 )(a) and 4.10.2(2)(a). If you have any questions regarding [his report or our <br />observations, please con t this office. <br />ANTS, INC., <br />Brian <br />y '~ 1 1 ~~y ~1~w~ <br />%i <br />xc: Byron ~' «I~ii(j,aD~Minerals & Geology <br />Job Number: 99-3983 NWCC, Inc. Page 2 <br />
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