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s^iSBwn_DBPXS5iiificLJiand_flnd_fiiI.t <br />( Underlying the post-glacial lake toargln soils is a 9 foot <br />layer of stream or alluvially deposited silt and sand, of later <br />glacial age. The upper portions of the deposit consists of fine <br />sandy silt, which grades to a fine to medium sand with silt <br />traces. <br />The silt component of this formation is stiff in <br />consistency, and the sand component is medium dense. <br />The sandy silt and sand layer has moderate load bearing <br />capacity and low compressibility, and is a suitable subsoil. <br />Hes Jloinea-Clayey Glaclal..Tm— <br />The major underlying soil typo at this site commences at 29 <br />foot depth below present fill surface, and extends beyond the <br />terminal depth of the boring. This is Des Moines clayey glacial <br />till, which consists of sandy clay with traces of gravel <br />throughout. The sandy clay has slight plasticity. <br />A standard penetration test in the glacial till was 10 blows <br />per foot, indicative of a tough consistency. Natural moisture <br />content of the sandy clay is 23%. <br />The Dos Moines clayey till has moderate load bearing <br />capacity and very low compressibility, and is a suitable <br />foundation subsoil. <br />JMnEiUI4NE«J«