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<br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />II <br />I <br />II <br />I <br />I <br />II <br /> <br />GEOTECHNICAL SETTING <br />The soils located within the limits of the previously proposed levees and chamlel <br />modification consist primarily of silty clay loams displaying properties oflow <br />penneability except for some isolated layers of sand and gravel Most of the silty clay <br />loam soils are suitable for use in the construction of the proposed levees. The <br />conclusions are based on a site visit and from the Soil Survey of Pipestone County, <br />Minnesota, released by the U.S. Department of Agriculture (USDA) in March 1976. <br />Soils information provided by the USDA generally applies only to the top 5 feet of the <br />surficial soils. Deeper soils information would have to be provided by exploratory <br />borings. Existing boring information was not available for this study. <br /> <br />The scope of this study was to perfonn a reconnaissance-level study of the <br />proposed levee construction and channel modification of the Main Ditch between <br />Hiawatha Avenue and State Highway 23, which is approximately 1.2 miles long. <br />Initially. a levee was proposed to be constructed on each bank of the Main Ditch from <br />Ninth Street to U.S. Highway 75. A discussion of the soils and their properties identified <br />within the area of the proposed levees and channel modification are presented herein. <br /> <br />There were five different types of soils identified in the Soil Survey ofPipestoae <br />County. Minnesota, by the USDA The soils in the area where 1he ditch is located and <br />from 100 to 800 feet on either side of the ditch were identified as Lamoure silty clay loam <br />(La). The La soil consists of clay, is fine grained and low plastic, and is dark gray to <br />black in color. The water table was assumed to be less than 2 fed deep in the areas of <br />this soil type. The penneability of La soil ranges from 0.68 to 2.0 inches per hour. The <br />Athelwold silty clay loam (At) was associated with soils located between 100 feet and <br />800 feet west of the Main Ditch north of Ninth Avenue and between 100 to 300 feet east <br /> <br />10 <br />