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<br />I <br /> <br />Woodward-Clyde Consultants <br /> <br />.., r~ ,-, 'i <br />t~uUl. <br /> <br />I <br /> <br />observed that the Bureau's reports (Ref. 5, 13) indicate that <br /> <br />the materials can be clayey sands (SC), lean clays (CLl and fat <br /> <br />clays (CH), most of these having little or no gravel. <br /> <br />, <br /> <br />. <br /> <br />Our review of laboratory permeability data contained in <br />Report EM-22l (Ref. 5) indicate that the~rage permeability <br />value from tests conducted in the Denv.~~~roject <br />Laboratories was in the order of o.~~~ear'~ x 10-7 <br />cm/sec--impermeable). The aboV%e t~sts were ~cq~posited <br />1 ' / . d th f 10 5 f <br />samp es representIng an averaJ1',~cavatIon ep 0 . eet. <br />We consider this data to be ~~,~y representative of the <br />average permeability of these ~o~aterials presently being <br />considered for core material. ~ <br />The shear strengt~rs_which we conservatively <br />estimated for the entire r~-;l derials that will probably <br />be placed Table 2. <br />3 . <br /> <br /> <br /> <br /> <br />be obtained ~m Borrow Areas X, X-Wand X-SW located in or <br /> <br /> <br />near;,zhe ~~~ the reservoir area. In the Bureau's <br /> <br /> <br />Table o;~f\parameters the materials were designated <br /> <br /> <br />Zone 2\and and gkaVel and were classified as a silty sand (SM) <br /> <br /> <br />with ~~~'~;{5% non-plastic fines. The SM classification <br /> <br /> <br />agrees with~e;{ata presented in EM-22l (Ref. 5). We noted <br /> <br />t <br /> <br />t <br /> <br />t <br /> <br />. <br /> <br />some poorly graded sand (SP) on recent log of test pit TP-X-l. <br /> <br />t <br /> <br />- 12 - <br /> <br />LA <br />~ <br />