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• III IIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />DCpdrlnA•nl nl N,Ilardl KCSOUrICS ~~Ib~ <br />111 4 Sherman SL, Knum 21 5 <br />Drnvvi, Colorado lgl!114 <br />Phony. I lfUl N66 1567 <br />F~1T 1111 i1 K1?HIfIL <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Ruy Romer <br />~j~O Cmerno~ <br />lanm. S. Lnchhead <br />f.n mrve Dvaun <br />Mi~hacl tl. Lonl; <br />TO• BERHAN KEFFELEW D.„~u,n Durnor <br />FROM: James Dillie ~,d~ r <br />DATE: January 29, 1996 <br />RE: LINER LOAD AND INTERFACE SHEAR DATA-100 Mil Smooth LLDPE <br />Liner -Cresson Project -Permit No. M-80-244 <br />At your request, I reviewed the results of the interface shear tests that were submitted by the <br />operator, involving 100 mil Smooth LLDPE liner material with Drain Cover Fill and Low Volume <br />Solution Collection System Fill. <br />Other than showing some minor signs of distress, the LLDPE liner material was not compromised <br />during the load testing. The results of the load testing confirmed a high shear resistance with a <br />friction angle of 31 degrees which exceeds the minirnum required (21 degrees) by the approved <br />permit. Therefore, the proposed material and usage is acceptable. <br />JD/gaw <br />cc: Allen Sorenson <br />James Stevens <br />M: \mc\g~w\LincLmd.jd <br />