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<br />•r <br />0 <br />July 5, 1995 <br />Calowyo Coal Company LP. <br />5x31 Stste Mlghway 13 <br />Meeker, Colorado 51641 <br />Attention: Mr. Jtm Klger <br />SubJect; Summary of Recommendatlone <br />West Pft Slide <br />Seating of Coai Seams <br />Colowyo Coal Mine <br />Moffat County, Coloratlc <br />Job No. 23,001 <br />Qerttlvmen; <br />Thla letter summarizes our recommendations regarding the eeepsge end earth <br />movements in the area of the West Plt sedimentation pond. The following keme an <br />discussed: <br />1. Slide areas adJacant to the Weat Pk aedlmentatlon pond, <br />2. Seepage arose located on the north facing stops between the main <br />pond slide and the excess spoil till elope, <br />3. Possible eftede of current condttlons on thv atebllRy of the excess <br />spoil fill. and <br />4. Poaslbie effects o} water within the Wast 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. Ths purpose of this report Is to summarize the <br />previous recommendatlona and to recommend performance and monRoring crRerie. <br />West PR Pond Slide <br />Ws previously reviewed condkions assocfeted whh the elide and provided <br />repair recommendations for the elide on the south aide of the sedimentation pond <br />in a letter dated May 5, 1995 (Landslide South of Weet Ph Pond, Job No. 29,001) <br />whteh Is (ncfudsd in Appendix A. The latter discussed site condRlons related to the <br />CTL/THOMPSON, INC. <br />CONSULTING ENGINEERS <br />1971 WEST 12TH AVENUE ~ DENVER, COLORADO 8020a ~ (303) 825-0777 <br />NOSdItOHl/110:18 1N3S <br />