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c) Storm Sewer Lateral Facilities <br /> A network of pipes ranging in size generally from 12 inches to 27 <br /> inches designed to collect storm runoff from a specified small <br /> area to a trunk facility. The lateral facilities also include <br /> street overland flow and inlet structures such as catch basins. <br /> manholes and flared end sections. <br /> d) Storm Sewer Taxing District <br /> • <br /> A drainage area determined by using topographical maps and surveys <br /> that mutually benefit from storm sewer improvements in conformance <br /> with Minnesota Statute Section 444. <br /> e) Watershed District <br /> A formally established area and Board which protects and controls <br /> • the water management aspects of subdivisions and developments <br /> within the region. <br /> 2. Determining Storm Sewer Assessment Rates <br /> a) Storm Sewer Trunk Rates <br /> 1. Design and estimate the total improvement cost of the <br /> ultimate trunk system needed to provide complete service to <br /> each property in the Service District considered. Also. <br /> 4.: include the total cost of any existing facilities and/or <br /> previous storm sewer assessments to be credited. <br /> 2. Determine the base assessment rate by dividing the ultimate <br /> system cost described above by the• sum total of the • <br /> t_ following: <br /> a. Gross area of low density residential properties times <br /> 1.0. <br /> f. <br /> 25 <br />