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p <br />f <br />R <br />* <br />mM <br />R <br />I <br />I <br />i <br />ii <br />m <br />m <br />3 <br />■■■■* <br />mm <br />Page S - #120 86-74 <br />elevation 936.5'. The house will have a crawl space extending to elevation <br />932'. For this type of construction, we estimate that typical wall loads <br />will be on the order of 3 to 4 kips per lineal foot and the column loads lest <br />than 50 kips. <br />Discussion <br />The borings Indicate the surficlal soils are fairly weak and variable, tfie <br />fill and soil classified as may be fill a*' gulte loose. Incur opinion, these <br />soils should not be relied upon for foundation suoport. <br />The underlying alluvial soils generally are quite loose or have a medluM con­ <br />sistency. While these soils are fairly weak, in our opinion they will provide <br />adequate support for spread footing foundations. Since the cohesive and <br />granular soils show different settlement characteristics, we recommend that <br />the foundations be supported on controlled fill rather than be extended to <br />the underlying natural soil. This will allow placement of all footings «t <br />the normal footing elevation and will also minimize differential settlement. <br />Foundation Reconmtendations <br />It Is our opinion that the proposed structure can be supported on spread <br />footing foundations. Ite recommend excavating all existing fill and topsoil <br />from the footing areas. Me then recommend placing a controlled fill to the <br />normal footing elevation. The excavation and compacted fill should extend