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iiiiiiiiiiiiiiiiiii, ;~ 999 estColoradoConsult,nts,Inc., -~ ~ Georechnital I Enrlronmental Engineering • Materlys Testing RECEIVEQ M%`i ~ i iSSB March 26, 1998 Division O(MineralS & Geology Bower Bros. Construction 595 Taylor Street Craig, CO 81625 Atm: Mr. Bud Bower Job No. 95-2296 Subject: Quarterly Inspection Report, Waste Coal Area, Foidel Creek Mine, Routt County, Colorado. Gentlemen, As requested, Northwest Colorado Consultants, Inc. has prepared this letter outlining our inspections made during the first quarter of 1998 at the Waste Coal Area, which is located at the Foidel Creek Mine in Routt County, Colorado. We visited the project site on March 23, 1997 with Rick Mills to inspect the waste coal area. At the time of our visit, the contractor was stockpiling the waste coal materials in the northern end of the waste coal area. Based on our observations, i[ appears that the contractor had been stockpiling the waste coal materials in the north-central portion of the stockpile and had not placed any compacted lifts since last fall. The surface drainage chazacteristics at the site appeazed satisfactory and much better than those observed at the site last spring. However, we did observe that some of the stockpiled waste coal materials had encroached into the temporary surface drainage ditch which had been constructed to the east of the stockpile and west of the crest of the completed embankment slope. We strongly recommend that these ma.[erials be removed as soon as passible so that [he drainage in the ditch is not backed up and allowed to pond. We also observed two sepazate surface slumps along the completed portion of the waste coal pile. The slumps were situated at the north end of the pile and approximately half way between the north end of the pile and the temporary haul road which is located in the central portion of the pile. A considerable amount of water was observed flowing from the failed azea at the north end of the pile. Based on our visual observations, we could no[ determine if the seepage coming from the failed areas was from surface runoff or from internal seepage in the pile. We recommended to Rick Mills that the location of these failed areas be surveyed in and that these areas be closely monitored to try and determine the source of water coming from the failed areas. If the seepage continues to Flow from these areas, the installation of horizontal drains may be required prior to the reconstruction of the failed areas and the placement of the 2 fee[ of clay soil. (970) 879.7888 • Fax (970) 879.7897 2068 Snow Bowl Plaza, Box 775226 • Steamboat Springs, CO 80477