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f ~ X, Consulting Engineers and Geologists <br />F. M. FOX & ASSOCIATES, INC. <br />47651NDEPENDENCE STREET <br />WHEAT RIDGE, COLORADO 80033 <br />(303) 424-5578 <br />D.H. Emling Company February 17, 1983 <br />7800 E. Union Avenue <br />Suite 420 <br />Denver, Colorado 80237 ,lob No. i-2660-3406 <br />Attention: Mr. Greg Lewicki <br />Subject: Mechanical Testing on Coal Waste Material <br />Dear Greg: <br />Enclosed are the results of the tests which were performed by our labora- <br />tory on the Sundance Coal Processing Plant waste product. The tests con- <br />ducted are one direct shear strength series of three points (ASTM D-3080), <br />one Standard Proctor compaction test (ASTM D-698) and one mechanical <br />analysis (ASTM D-422). Mill run moisture content of the waste was also <br />determined. <br />Direct shear tests were run on material smaller than a number 4 sieve, as <br />specified by ASTM, at 90 percent of the standard dry density and optimum <br />moisture content as determined by the proctor density curve generated for <br />this material. Normal pressures of 14, 28 and 56, psi were used to deter- <br />mine the behavior of this material ~~ithin the range of normal pressures <br />anticipated. <br />If you have any further questions concerning this report or if you require <br />further consultation in the future, please do not hesitate to contact us. <br />F. M. FOX & ASSOCIATES, INC. <br />~~.~ <br />Edward D. Ford <br />Senior Staff Geological Engineer <br />Reviewed by: <br />~~ <br />Regan A. Heath, P.E. <br />Principal Geological Engineer <br />EDF/da <br />18147 <br />ALBUOUEROUE • DENVER • PHOENIX <br />