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AMUEDO AND IVEY <br /> wORIDWIDE GEOLOGICAL CONSULTANTS <br /> IBfiOS ILL&ON $TREE? <br /> SUITE Big <br />• DENVER COLORADO BOiii <br />TEL: ~OY15&ti31 <br /> FA%: 30Y1BB~BT55 <br />INC. <br />EauuuMa t95d <br />PETROLEUM AHD MINEFIAL E%PLOPATION <br />ENGINEERING GEOLOGY AHD PHOTOGEOLOGY <br />August 22, 1994 <br />Mr. Thomas J. Wainwright, P.E. <br />Senior Engineer <br />Peabody Western Coal Company <br />1300 So. Yale Street <br />Flagstaff, AZ 86001 <br />Dear Mr. Wainwright: <br />JDNN B. IVEY. CPG. RG. PE <br />PRESIDENT <br />This letter transmits our report, "Engineering Geologic <br />Mapping, Yoast Mine and Vicinity, Routt County, Colorado." <br />The report and accompanying maps describe our geologic <br />findings for certain proposed facilities. These facilities include <br />a haul-road alignment connecting the mine with Routt County Road <br />27, a sedimentation pond site, and a number of top-soil stockpile <br />areas. <br />• The Haul Road A alignment traverses an area composed mainly of <br />soil and colluvium derived largely from shale with a lesser amount <br />derived from sandstone. Haul Road B consists primarily of <br />sandstone with relatively minor interbeds of shale and their <br />weathered products. This segment (B) of the alignment will <br />encounter more varied geology and topography than segment A. <br />Geologic structure is more critical to the development of Haul Road <br />B than is the case along the A alignment. <br />The proposed sedimentation pond is in a geologically sound <br />site. The top-soil stockpile sites also are located in areas that <br />appear to be geologically sound. <br />If during the design and construction phases of the project <br />significant departures are found from what is presented in this <br />report, it will be advisable to contact us for further geologic <br />inputs. <br />It has been a pleasure to work with you on this project and I <br />wish you well in its ultimate development. <br />Sincerely, <br />AMUEDO AND IVEY, INC. <br />• <br />Jo n B. Ivey, PE <br />President <br />JBI/cw <br />