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v~ . III Hakanson Anderson 1 Assoc., Inc. Engineers, Surveyors &. Landscape Architects May 3, 1988 Mr. Gerald Zimmerman Ramsey Planning & Zoning commission City of Ramsey 15153 Nowthen Boulevard N.W. Ramsey, MN 55303 Re: Impacts of Extending utilities to Outlot B, Rum Acres Estates Dear Mr. Zimmerman: As requested at your April 12, 1988 planning and Zoning commission meeting, we have reviewed the impacts of extending utilities to Outlot B, Rum Acres Estates. In review of the ground water elevations in the area, the elevation of ground water along Roanoke street was approximately 852.0 in 1987 and the elevation of the ground water along Waco street in River's Bend was approximately 854.0 in 1984. Since Outlot B lies between these areas and the Anoka Soils Survey indicates the area is composed of granular soils with a permeability of 6-20 in/hour, we would conclude that the ground water at Outlot B would be at the same approximate elevation. The proposed sewer and water extensions would commence at 149th Avenue and Waco Street. The existing invert of the sanitary sewer at 149th and Waco Street is at approximately elevation 872 and would increase as it is extended north to Outlot B. The proposed watermain would be installed seven and one-half feet below the proposed streets in Outlot B which vary from elevation 885 to elevation 897. Since the estimated watertable elevation of 854 is 18 feet below the proposed utilities, there will be no need for dewatering. Therefore, the installation of utilities will not impact the surrounding well and ground water levels. 222 Monroe Street Anoka, Minnesota 55303 612/427-5860 Eugene J. Hakanson, P.E. James M. Winter, LS. Lawrence G. Koshak, P.E. Peter R. Raatikka, P.E.