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t <br />J•.. ;~~-~. - - <br />., <br />.};,.; <br />,. ,.w; <br /> <br />'ROLI.INS, BROWN nrm GUNNIII., INC. <br />PROFESSIONAL ENGINEERS <br />February 1, 1984 <br />Hr. Randy Watts <br />U.S. Steel <br />East Carbon, Utah <br />Dear Randy: <br />Transmitted herewith are the results of six triaxial ehaar <br />tests performed on samples delivered to our office by your <br />organi2:e[ion. The triaxial shear tests are presented in the <br />form of a Mohr envelope as shown on the attached cheats. <br />In obtaining the friction angle, the material vss ~sifiad <br />to unit weights of between 100 and 103 pounds per Cubic foot. <br />The materials were saturated by back pressure techniques prior <br />to performing the tests. It will be noted that friction aR~lea <br />of 14.8 and 25 degrees were obtained for these mateTiad:a; <br />respectively. <br />Please advise us if we can be of further assist;uce to. <br />you <br />Sincerely, <br />ROLLINS, T~I~UNNELL, INC. <br />~~ <br />Ralph L. Rollins <br />RLR/lah <br />Enclosures <br />1435 Wesl 820 North, P.O. Box 711 • Provo, Utah 84603• (801)374-5771 <br />