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- ~ ~ = iii iiiiiiiiiiiii iii <br />999 <br />Northwest Colorado Consultants. Inc. <br />Geotechnical /Environmental Engineering • Materials Tertine <br />October 18, 1999 <br />Twentymile Coal Company <br />29515 RCR N27 RECEIVED <br />Oak Creek, CO 80467 <br />Attn: Mr. Rick Mills ~~T 2 71999 <br />]ob No. 99-3983 Divisionol <br />Minerals & Oep%Y <br />Subject: Quarterly Inspection Report, Waste Coal <br />Area, Foidel Creek Mine, Routt County, Colorado. <br />Ladies & Gentlemen; <br />As requested, NWCC, Inc. (Northwest Colorado Consultants, Inc.) has prepazed this letter outlining our <br />inspections made during the third quarter of 1999 at the Waste Coal Area, which is located at [he Foidel <br />Creek Mine in Routt County, Colorado. <br />As requested, our firm visited the project site on September 17, 1999 to observe/inspect the construction <br />operations. A[ the time of our visit, it appeared that the contractor was stockpiling the waste coal in the <br />north end of Area 1. However, the contractor had not yet started to spread out and compact the <br />materials. We were informed by Mr. Mills that the wash plant has not been used for the preparation of <br />the waste coal for the last several months and that they had just resumed washing the waste coal during <br />the first week of September. Since they had not placed nor compacted any lifts of fill materials during <br />this quarter, we did not take any compaction tests. <br />Based on our part-time observations and inspections, it appears that the waste coal materials were being <br />stockpiled in general accordance with the project plans and specifications. <br />As suggested in our previous quarterly repott, the water levels in the monitor wells, installed on October <br />23, 1997, were measured during this quaver on a monthly basis. The groundwater elevations measured <br />in the wells are summarized below. <br />Groundwater Elevations <br /> Test Hole 1 Test Hole 2 <br />Date (South WeID (Notth Well) <br />10/30/97 6894.5' 6892.3' <br />(1/25/97 6891.5' 6887.3' <br />10/1/98 6896.2' 6894.7' <br />10/29/98 6896.1' 6894.7' <br />11/24/98 6897.5' 6894.6' <br />12/30/98 6897.9' 6894.2' <br />01/29/99 6898.1' 6893.8' <br />(970) 879.7888 • Faz (970) 879.7891 <br />2063 Snow Bowl Plaza, P.O. Box 775226 • Steamboat Springs, CO 80477 <br />