1984-09-01 Soil Report - Laserfiche WebLink

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Clayey Alluvium Underlyina the mixed fill and organic soils at each boring is z, deposit of clayey alluvium. I* is likely that the alluvium was derived from the underlying glacial till, by ctream action or shoreline de-elopment processes. The alluvium consists of blue -grey fine to coarse sandy cla with trace -,ravel content. It extends to a depth of 7.5 feet at TH-1 -ind 13.5 feet at TH-2. It is slightly to :moderately plastic. It also contains roots in the upper few feet at Test Hole 2. Standard penetration test values i-, the alluvium vary from 4 to ? blows per foot, generally representative of a stiff to tough condition. Hewe,,er, soft zones were noted to a depth of app7oximately 10 feet at Th-2. The alluvial clay generally has low t:) moderate load bearini ,-apacity and lc,- compressibility and is a suitable foundation for support of both footings and floor slaLs. However, the upper few feet of alluvium at TH-2 is sot_ and is not suitable for footing support. It is likely that this sift zone covers a larger area in close proximity to the lake. Clayey Glacial T,ll Tr.e major soil type at this property occurs at a depth of 7.5 feet at Hole i and 13.5 feet at Hole 2, and extends beyond the 20 foot terminate depth of both borings. It consists of green -grey and dark grey, fine to coarse sandy clay with trace gravel content, and includes lenses of clayey san'. The till is slightly plastic. Standard penetration test values Within the till vary fi:om 10 to 21 blows per foot representative of a tough to very tough consis- tency. This deposit has moderate load -bearing capac:*y and low compressibility. It is a suitable foundation subsoil. bUBTERRANEAN ENGINEERING CORP. MINNEAPOLIS, MINNESOTA