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Aug-21-96 O6:36A Lincoln DeVore of Grd Jct 970-242-1561 r.~i <br />curd tc•xLure. The soils encountered in the embankment ar•e~ns xmi <br />thtr underlying native soils are quite stratified. Thr• st.ratifi- <br />c•at.ion in the embankment is a result of the r.onsi [•uc•t ion prucr•s5 <br />ar,d t.lua stratification in the native soils are rcuuuutts of the <br />original bedding and lithology changes in the Mesa Verde Forma- <br />t ion. The st.rett ificatian of the embankment soils and t.ha undar•- <br />15•irlg rlativr soils is evidenced by minor changes if: the soil <br />tw~turr-, variations in soil density and soli moisture r•unLenl.. <br />The sail encountered in the embankment. <br />area was classified as a silty, sand}• clay (CL) under t.ite Unified <br />Classification System. The standard penetration t.~•sl.s r:rngE'll <br />from 12 blows per foot to in excess of 50 blows per foot.. Perle- <br />trat.ion testy of this magnitude of range indicate thr soils ar~• <br />yuit,e variable in nensity and consistenc}•. Urrdist.llr•bed samples <br />warn 9tIbJP.CLP.d to in-place density testing which indic•atr-d the <br />suits ranged from 9.1.8 pounds per cubic foot to 108.1 pounds per <br />culric foot. Density' values of this range also indicate the soils <br />ar•e ytlite variable in consistency. Inspection of thetrill logs <br />indicate the density values are quite scattered ths•oughotlt. thr <br />lir•ill holes and the native sells are as varied as ire t)le emhank- <br />tner,t fill r•nilr Thr uuli~lurr rnnl,rnl ~nl inl ('low 'f~•176 law 2VIGP6~ <br />In general, Lhc soil moioturo aenter.t ihcroocod with dopt.h hor.ror•- <br />er, some wetter ar,d drier strati can be found Chroughout the soil <br />profile, as shown on the drilling lugs. <br />This soil type is of low pla5tir•it~ and <br />is sensitive to changes Ln moisture content. Upon the addition <br />of Inoist:lre, the soils will tend ea ex}sand. If the soil moisture <br />decreases, the sails will tend to shrink, with some cracking upon <br /> <br />