Agenda - Council - 06/26/2012 - Laserfiche WebLink

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sewer service. This study verifies that the two existing interceptor sewers that serve the City of Ramsey have the capacity to serve the entire City both north and south of Trott Brook based on the development densities in the 2030 Comprehensive Plan for new developments and limited redevelopment of existing rural residential areas to higher density. C. PAST PLANNING Land use assumptions originally made in 1974 and 1978 were used to size the existing sanitary sewer facilities that serve the City of Ramsey. One of the key assumptions made at that time was that undeveloped property would ultimately be developed as residential property with a density of 2.5 dwelling units per acre. The other key assumption was a population estimate of 3.67 people per existing residential unit and a population projection of 3.2 people per unit for future residential growth. In order to accurately reflect actual housing densities, the 1991 Comprehensive plan completed by Hakanson Anderson Associates, Inc. incorporated a detailed review of the impact that existing development would have on future development densities. The areas outside of the City's urban service boundary were permitted to subdivide into lot sizes of one acre and larger. According to the 1991 sewer plan, at the time of the report, approximately 1/3 of the land in the City's rural transition area was undeveloped. Based on this, the 1991 report attempted to project practical development density, which resulted in a development density of less than 2.5 units per acre in many areas. Ultimate sanitary sewer flows were calculated based on development assumptions for the following major land -planning categories: Urban: This planning area consisted of land that was within the current metropolitan service area, which had been expanded to the 2000 MUSA line. Housing densities in this area were primarily fixed by existing development and preliminary plats and proposals. Sewer flow within the 2000 MUSA line was calculated based on the number of existing and proposed lots and the City of Ramsey Page 2-3 Comprehensive Sanitary Sewer Plan - 2012 Prepared by Bolton & Menk, Inc.