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- 8 - <br /> The overburden soils at shallow depths typically exhibit low <br /> to moderate change potential and rroderate shear strength when loaded <br /> at existing moisture and density o~nditions. The silt and fine sands <br /> within the valley bottom also exhibit tendencies to compress <br /> moderately wtien wetted. Moist upper clays encountered within the <br /> plateau area do not exhibit significant swell potential. However, if <br /> allowed to dry, moderate to high swell potential would be anticipated <br /> suds as exhibited by some of the lower dry clays (see Figs. 18 <br /> and 22). Swell pressures between approximately 2,000 to 10,000 psf <br /> were measured. <br />' Permeability tests perfor;:ied on remolded samples of the clays and <br /> sandy silts, presented in Table II, indicate minor seepage potential. <br /> ld <br />o be <br />t <br />ithi <br />th <br />l <br />t <br />l <br />N <br />l <br />l <br />il <br /> s w <br />n <br />e upper p <br />a <br />eau area cou <br />a <br />s <br />a <br />ura <br />ay so <br />c <br /> relatively impervious. CTganic matter tests were conducted on the <br /> topsoil layer (Table III). <br />' Moisture contents were generally described as being rtuist to ve rl <br /> moist for near surface soils. Within most of the plateau area, soils <br /> became only slightly rroist with depth, wi~ereas in the lower area near <br /> the river, free water was encouctered at depths 3 to 10 feet. Ground <br /> <br /> water levels enwuntered at the boring locations are presented on <br />Figs. 4 through 9. Seasonal fluctuations to these general trends <br />should be anticipated, especially during spring runoff when perched <br />' water conditions can develop. <br />II~IDFINFQSEN'P RE(l~[~A1Q~IDATION <br />Foundations: Based on anticipated wnstruction and soil conditions <br /> <br /> <br />