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2020 Eugene Wastewater Master Plan Chapter 2: Study Area and Land Use 5 <br />• Laurel Hill <br />• South Amazon <br />• Royal Node <br />MAJOR SYSTEM BASINS AND SUB-BASINS <br />To analyze flow in the wastewater collection system, the study area was divided into major system basins <br />and sub-basins as shown in Map 2-A. These basins and sub-basins were initially based on the network <br />system developed in the 1978 Sewer System Evaluation Survey (SSES) report by CH2M-Hill and the 1992 <br />USSMP. Minor basin boundary modifications have been made to those basins as published to reflect <br />actual construction, elimination of the urban reserve and increased topographic mapping capabilities. In <br />addition, the Bethel South major basin was renamed South West, and the Bethel North basin was <br />renamed Bethel. <br />DEVELOPMENT PLANNING <br />Development within Eugene and Springfield is guided by the Eugene-Springfield Metropolitan Area <br />General Plan (Metro Plan). The Metro Plan, which serves as the regional comprehensive land use plan, <br />promotes compact growth through the use of an urban growth boundary. Growth occurs by <br />development of vacant and underutilized lands, as well as redevelopment inside the urban growth <br />boundary. Development within Eugene is also guided by the Envision Eugene Comprehensive Plan, <br />adopted in 2017 as Eugene’s city-specific land-use plan. The Envision Eugene Comprehensive Plan guides <br />future growth within Eugene’s UGB. <br />More detailed land-use planning is provided in neighborhood refinement plans, special area studies, and <br />the Eugene-Springfield Public Facilities and Services Plan. This level of detailed planning allows public <br />utilities, services, and facilities to be designed and constructed in an orderly and efficient manner. <br />PRESENT AND FUTURE LAND USES <br />The Envision Eugene Comprehensive Plan used a geographic model, along with input from technical <br />experts, to create the inventory of the City’s land supply. The City compared projected land-use needs to <br />the capacity available in the City’s buildable land supply as further described in the Envision Eugene <br />Employment Land Supply Study. Based on this analysis, the UGB was expanded in 2017 to meet 2012- <br />2032 land-use needs. Table 2-1 uses similar methods as the Envision Eugene Comprehensive Plan to <br />illustrate how development is expected to affect each wastewater basin. <br />For residential development, the City receives a certified city-wide population estimate. The City <br />estimated 2017 basin populations using methods similar to the Comprehensive Plan’s method (2.24 <br />persons per household per the 2010 U.S. Census multiplied by the number of residential address points <br />in the Regional Land and Information Database). These results are shown in Table 2-1. <br />The 2032 basin population estimates in Table 2-1 equal the 2017 population plus anticipated growth <br />through 2032. Housing growth was estimated using several methods. On vacant and partially vacant <br />areas the method was similar to the Envision Eugene Comprehensive Plan, Residential Land Supply Study <br />housing capacity estimates for 2012-2032. Also taken into account was a baseline amount of housing <br />redevelopment. Finally, consideration was given to political measures that increase legal residential land <br />density. Every new housing unit was assumed to add 2.24 persons to the basin.