Agenda - Council - 06/24/1984 - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I Findings of Fact River's Bend Page 2 July 1984 D. Topography, Soils and Geology The topography on the project is rolling, ranging in elevation from approximately 848 to 888 feet above sea level. The soils on the project site consist of Sartell fine sand, Dickman sandy loam, Becker sandy loam, Nymore loamy sand and Marsh. The geology in the area consists of 130 feet of glacial drift, 30 feet of the ST. Lawrence formation, 220 feet of the Franconia Formation, 50 feet of the Ironton Galesville formation under- lain by the Eau Claire, Mt. Simon and Hinckley formations. (EAW, Anoka Co. Soils Survey and the City's Comprehensive Water Study) Ground Water The ground water ranges from 0 to 35 feet below the surface and will be encountered during the construction of a portion of the public utilities. Consequently, dewatering will be required during construction using wells, well points, sump pumps and deep wells. Once the project is complete ground water levels will return to normal. Ground water quality should not be affected by this project since the ground water will exert a positive pressure on the proposed sewers and seep into them rather than have the wastewater seep out. Infiltration rates will be limited to 100 gallons/day/inch of diameter/mile. (Eaw and City's Comprehensive Sewer Plan) Shorelands, Floodplains, Wetlands, and Rivers The proposed development will be consistent with DNR's Shoreland regulations. Also rezoning of the floodplain has been approved by DNR. There is a protected wetland (No. 2-680 w) within the development which will be altered. A permit to alter the wet- land will be obtained from the DNR (Comments to EAW). G. Surface Water Quality Disposal of wastewater from the project will be made through the MWCC interceptors, with treatment at the Anoka Treatment Plant. Surface water runoff from the project will flow into wetland No.2-680 w-and the Rum River. Permits to discharge into the Rum River will be applied for from DNR. The wetland will serve as a sedmentation basin for the stormwater. (EAW)