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a <br /> <br />April 12, 1996 <br />Basin Resources <br />14300 Highway 12 <br />Weston, Colorado 81091 <br />Attention: Mr. Bob Montgomery <br />Subject: Compaction Testing and Groundwater Measurements <br />New Elk RDA <br />Golden Eagle RDA <br />New Elk Waste Development Pile <br />Weston, Colorado <br />Job No. 22,905 <br />Gentlemen: <br />Attached are the location, elevation and results of the field compaction testing <br />performed on March 22,1996. Elevations were provided by Basin Resources based <br />upon altimeter readings. The test results indicate compaction generally exceeds 90 <br />percent of maximum standard Proctor dry density (ASTM D 698) with the exception <br />of the New Elk Waste Development Pile. We previously performed three standard <br />Proctor moisture-density tests (ASTM D 698) for each coal waste area. Additional <br />laboratory testing was not performed for this site visit. The percent compaction was <br />determined relative to the highest previous Proctor value for each facility. Additional <br />compaction is recommended for the New Elk Development Waste Pile. <br />We also measured groundwater in the monitor wells on the lower three <br />benches of the New Elk RDA. The results are presented on Table I. The <br />groundwater measurements indicate water levels are below the base of the coal <br />refuse. If you have question, please call. <br />Very truly yours, ,.,~?pn REG/Sr <br />CTUTHO SON f c~~_ ~` G. ~~~-~5~ <br />„ ~ ~ (' 22804 . <br />Gray, <br />Reviewed by: <br />C ~ i,/~ <br />Ronald M. McOmber, P.E. <br />Principal <br />MGG:RMM:dd CTL/THOMPSON, INC. <br />(3 copies sent) CONSULTING ENGINEERS <br />1971 WEST 12TH AVENUE ~ DENVER. COLORAD080204 • (303) 825-0777 <br />