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..~ . ~ ~. iii iiiiiiiiiiiu iii <br />CTL/THOMPSON, INC. <br />CONSULTING GEOTECHNICAL AND MATERIALS ENGINEERS <br />November 23, 1982 <br />Colorado Yampa Coal Co. <br />P.O. Box 772129 <br />Steamboat Springs, Colorado 80477 <br />Att: Mr. Mike Kondelis <br />Subject: Quarterly Inspection <br />of Excess Spoil Disposal Area II <br />Eckman Park <br />Job No. 85696 <br />Gentlemen: <br />RECEIVED <br />JAN 2 01983 <br />MINED LAND IIECLAMATION <br />COLO. DEPT. OF NATURAL RESOURCES <br />At your request a representative of our firm made a quarterly inspection <br />of excess spoil pile II on October 7, 1982. The purpose of our inspection <br />was to observe construction procedures and to examine for evidence of <br />instability. This letter summarizes our observations. <br />Spoil was being placed in the lower portions of the northeastern one- <br />quarter of the disposal area. Spoil has previously been placed to about <br />design elevations in the western portions of the disposal area. <br />The materials being placed essentially consisted of non-slakeable sand- <br />stone and some slakeable shales. While no spoil was being deposited at <br />the time of our inspection, it appears that materials were being laid <br />in average 4-foot thick lifts. The pile had been raised to slightly above <br />the lowest intermediate bench level. Evidence of slope failures in the <br />area being worked or in the areas which had previously been filled were <br />not apparent at the time of our inspection. <br />If we can be of further service in discussing the contents of this letter, <br />or our observations, please call. <br />Very truly yours, <br />By <br />am c./,grpttmgnn,,lr. , <br />..., <br />. ,', L5 r.'p ~, <br />^. 7 81 <br />"-e r" <br />Robert W. Thompson, P.E. President_ ~' <br />WCH:RWT:dm ~ <br />(5 copies sent) <br />Reviewed by ~ " <br />1971 WEST 12TH AVENUE DENVER, COLORAD08020"1 (303)825-0777 <br />