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<br />July 6, 1995 <br />Colowyo Coal Company L.P. <br />5731 State Highway 13 <br />Meeker, Colorado 81641 <br />Attention: Mr. Jim Kiger <br />Subject: Summary of Recommendations <br />West Pit Slide <br />Sealing of Coal Seams <br />Colowyo Coal Mine <br />Moffat County, Colorado <br />Job No. 23,001 <br />Gentlemen: <br />This letter summarizes our recommendations regardingtheseepage and earth <br />movements in the area of the West PR sedimentation pond. The following items are <br />discussed: <br />1. Slide areas adjacent to the West Pit sedimentation pond, <br />2. Seepage areas located on the north facing slope between the main <br />pond slide and the excess spoil fill slope, <br />3. Possible effects of current conditions on the stability of the excess <br />spoil fill, and <br />4. Possible effects of water within the West Pit excavation on the <br />seepage. <br />We have reviewed and/or incorporated the results of several previous investigations <br />which are referenced in this report. The purpose of this report is to summarize the <br />previous recommendations and to recommend performance and monitoring criteria. <br />West Pit Pond Slide <br />We previously reviewed conditions associated with the slide and provided <br />repair recommendations for the slide on the south side of the sedimentation pond <br />in a letter dated May 5, 1995 (Landslide South of West Pit Pond, Job No. 23,001) <br />which is included in Appendix A. The letter discussed site conditions related to the <br />CTL/THOMPSON, INC. <br />CONSULTING ENGINEERS <br />1971 WEST 12TH AVENUE ~ DENVER, COLORADO 80204 ~ (3D3) 825-0777 <br />