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~ ~ <br /> Based on billable flow data from the regional sewage treatment plant, it was <br /> determined that approximately 47 percent of the total user flow through the <br /> plant is attributable to single-family residential development. It is estimated <br /> that a total of 90,000 residential units (existing plus future) can be <br /> accommodated within the urban growth boundary. Of this amount, <br /> approximately 64 percent (57,600) are estimated to be single-family units. <br /> Based on these factors, the estimated capacity of the city's sanitary sewer <br /> system is 122,553 EDUs (57,600 DUs/47 percent of user flow). Dividing the <br /> non-assessable costs by the system capacity yields a sanitary charge of $473.61 <br /> per EDU or $29.60 per plumbing fixture unit. <br /> 1.1.1 Rates <br /> 1.1.1.1 Single Family Dwellings & Duplex <br /> For single family dwellings the local sanitary sewer charge is the rate <br /> for one EDU. For a duplex it is two times the EDU. <br /> 1.1.1.2 All other development <br /> 1.1.1.2.1 New Development <br /> For all other new development the local sanitary sewer charge <br /> is the rate per plumbing fixture unit times the number of <br /> plumbing fixture units in the proposed development. <br /> 1.1.2 Existing Development <br /> For administrative convenience, rather than verifying by physical inspection <br /> the numbers of plumbing fixture units in existing development that is <br /> connecting to the sanitary sewer for the first time, the local sanitary sewer <br /> SDC shall be determined by using the historic winter water consumption for <br /> the existing development. Atypical single family dwelling average winter <br /> water consumption is 6,000 gallons per month. By dividing the EDU rate by <br /> six the an rate per 1,000 gallons can be determined and applied to the average <br /> winter water consumption of the existing development to calculate the local <br /> sanitary sewer SDC. Using the EDU rate of $474 the rate per 1,000 gallons <br /> is $78.94. <br /> 1.2 Formula for River Road/Santa Clara/Highway 99 Areas <br /> For the River Road/Santa Clara and Highway 99 areas, in lieu of the EDU/plumbing <br /> fixture figure the sanitary system charge will be levied equal to 2.5 cents times the <br /> square footage of the connecting property. <br /> <br /> February 24, 1993 Methodologies: City of Eagene SDCs Page D-4 <br /> <br />