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<br /> v <br /> j <br /> ~ METHODOLOGIES: <br /> City of Eugene Systems Development Charges <br /> II Appendix D <br /> I~ , <br /> Wastewater System Charge Detail <br /> I <br /> 1.t1' local Wastewater System <br /> u, <br /> 1.1 Local Wastewater SDC Formula Within the City, excluding the River Road/Santa <br /> ~ Clara/Highway 99 Area <br /> e River Road/Santa Clara/Hi hway 99 Area identified in Attachment 2, the local <br /> Excludin th 9 <br /> 9 <br /> wastewater SDC is based on the replacement value of the wastewater collection system in <br /> place on the date the rate is established plus all projects in the wastewater master plan <br /> needed to serve the area inside the City's Urban Growth Boundary (UGB). The equivalent <br /> assessments and any state or federal grants are subtracted from this amount and the <br /> j remainder is divided by the total number of "equivalent dwelling units" (EDUs) which can be <br /> accommodated within the UGB (both existing and projected). For a current estimate of local <br /> slues to serve new develo ment, including future projects and existing <br /> wastewater stem v P <br /> sy <br /> reserve capacity (reimbursement) details, please see Table 4, section 5. <br /> The impact of new development on the wastewater system is calculated in terms of equivalent <br /> single family dwelling units (EDUs) or plumbing fixture units. The impact of an EDU was <br /> estimated by determining the non-assessable cost of the future system within the urban <br /> growth boundary allocated to ultimate residential development on the basis of sewage flow. <br /> The State Drainage Plumbing Code is the basis for the calculation of the number of EDUs for <br /> different types of development. For purposes of setting this rate, one EDU is equal to 16 <br /> plumbing fixture units. Plumbing fixture units are defined in the Plumbing Code for each <br /> plumbing fixture type. <br /> The total cost of the existing system within the (UGB) listed in Table 4, section 1, is estimated <br /> based on figures from the Infrastructure Replacement Values Report" and the Wastewater <br /> Master Plan prepared by the City's Public Works Department. Costs related to the River <br /> Road/Santa Gara/Highway 99 Area portion of the system outside the City are excluded . The <br /> cost of future projects within the urban growth boundary other than in the River Road/Santa <br /> Clara/Highway 99 Area were taken from the Wastewater Master Plan. Future project costs <br /> are listed in Table 4, sections 1 and 5. Assessable costs were estimated by calculating the <br /> cost of an 8" equivalent system as specified in the City Code. The non-assessable portion <br /> of that cost is estimated and listed in Table 4, section 4. Details on the calculation of the local <br /> wastewater SDC are shown in Table 4 and the formulas are illustrated in Figure 4. <br /> The total number of Single-family Units (SFU) is calculated by multiplying the ratio (percent) <br /> of Single Family Dwelling Units (SFDU) by the number of Total Capacity Residential Units <br /> (existing plus future). The total number of Residential Units is based on the system design <br /> capacity for users within the (UGB). The total user flow measured through the plant that is <br /> attributable to single-family residential development (SFDU Attributable Flow) is determined <br /> based on billable flow data from the regional sewage treatment plant. The system capacity <br /> for the City's Wastewater collection system is converted to total EDUs, and is estimated by <br /> ',II ~ dividing the number of SFUs, by the percent of SFD Attributable Flow. <br /> I~,I M rch 01, 1997 Methodologies: City of Eugene SOCs Page D-1 <br /> <br />