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• <br /> AVRES <br /> ASSOCIATES <br /> January 31, 1994 <br /> Thomas E. Wohlleber <br /> Director of Business Services <br /> Middleton-Cross Plains Area School District <br /> 7106 South Avenue <br /> Middleton, WI 53562 <br /> Re: County Trunk Highway K Property, Springfield Township, Dane County, Wisconsin <br /> Subsurface Wastewater Infiltration System (SWIS) Feasibility <br /> Dear Mr. Wohlleber: <br /> The Middleton-Cross Plains Area School District is considering purchase of the above mentioned <br /> land for construction of an elementary school. Prior to the actual purchase, your office requested <br /> our services in assessing suitability of the site for on-site wastewater treatment. We have <br /> responded to your request by reviewing available resource materials, United States Geological <br /> Survey 7.5 minute quadrangle maps and the Soil Survey of Dane County, and completing field soil <br /> investigations. This letter report presents the results and conclusions of our investigations. <br /> The property being considered for purchase by the school district is a 40-acre agricultural field <br /> located in the Town of Springfield, Dane County. Specific location of the parcel is the southwest <br /> 1/4 of the northeast 1/4 of Section 27, Township 8 North, Range 8 East. Site topography consists <br /> completely of upland area with a broad swale having a northeast-southwest axis near the center of <br /> the site. Slopes range from 2 to 8%. Ground elevations range from a low of approximately 965 <br /> feet above mean sea level (nisi) near the southwest property corner to 1110 feet msl along the <br /> northern property boundary. Three soil series have been mapped on the property: Plano, <br /> Ringwood, and St. Charles silt loarns. Plano, which has been mapped on nearly 80% of the site, is <br /> well to moderately well drained. Ringwood and St. Charles are also well to moderately well <br /> drained. Moderately well drained soils typically have a horizon with lower hydraulic conductivity <br /> than those above. Lower hydraulic conductivities can lead to seasonal saturated conditions in the <br /> subsoil. <br /> Site specific soil conditions were assessed through observation and interpretation of soil profiles <br /> exposed in backhoe test pits. Soil profiles were described using United States Department of <br /> Agriculture Soil Conversation Service nomenclature for texture, structure, consistence, density, <br /> color, and mottling. Nine test pits were excavated on January 24, 1994, with locations shown on <br /> the attached site plan. <br /> In general, soil on the site was observed to have physical properties and drainage classes similar <br /> to those identified in the soil survey with the eastern third of the property consisting of well drained <br /> Owen Ayres& Associates, Inc. <br /> Engineers/Photogrammetrists/Scientists/Surveyors <br /> 2445 Darwin Road. Madison. WI 53704-3186. (608)249-0471, FAX (608) 249-2806 <br /> Printed •e�ycle: hwyklrep.doc <br /> 18-0132.00 <br />