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2020 Eugene Wastewater Master Plan Chapter 3: Existing Wastewater Systems 11 <br />are 72 miles of wastewater pipe, about half of which were built prior to 1980, with the first segments <br />built in the early 1950s. <br />Since the 1992 plan, a significant portion of the basin was either determined to be wetlands, or <br />converted to wetlands, and is no longer available for development. There is still a large amount of <br />undeveloped land in the southern part of the basin, primarily along Bailey Hill Road, Willow Creek Road <br />and West 11thAvenue. There currently are no pump or lift stations within the basin, but to serve the <br />Bailey Hill area, a pump station will need to be built. The entire South West basin drains to either the <br />Terry or Barger pump stations in the Bethel basin. <br />Downtown (DW, DC, DF & DA) <br />The Downtown group (see Map 3-H and Map 3-I) includes four major basins (West, Central, Amazon, and <br />Franklin) which are further divided into 61 sub-basins. The area extends from City View on the west, the <br />UGB on the south, Fairmount Boulevard on the east, and the Willamette River on the north. <br />The Downtown group is served by a network of about 261 miles of lateral, trunk, and interceptor <br />wastewater lines that carry wastewater downstream to the Fillmore lift station near Polk Street next to <br />the south bank of the Willamette River. <br />The total flow is then routed through a 72-inch gravity interceptor on the west side of the river to the <br />regional wastewater treatment plant. The 72-inch West Bank interceptor was constructed in 1951, has a <br />2007 modeled design capacity of 117 MGD, which will be adequate if infiltration is minimized in new <br />system construction and infiltration/inflow is reduced by rehabilitation of the existing system. <br />Approximately 182 miles of pipe in this basin group was more than 50 years old in 2019. Significant <br />rehabilitation projects have been constructed since 1995 to address existing infiltration/inflow (I/I). <br />With the exception of the southernmost parts of the Amazon basin, the Downtown group is fully served <br />by wastewater infrastructure. <br />Laurel Hill (LH) <br />The Laurel Hill basin (see Map 3-I) is the area east of Floral Hill Drive. The first segments of wastewater <br />pipe were built in the early 1950s. Approximately nine miles were built prior to 1982, with no <br />construction for the next 18 years. Since 2000, three additional miles of pipe have been built. <br />Prior to 1994, flow from this basin went by gravity down Judkins Road and Franklin Boulevard to Judkins <br />Point lift station. In 1994, the Glenwood regional pump station was completed, and the entire basin has <br />been redirected to that station. <br />Approximately 60 percent of the basin is undeveloped. All future development flows will continue to be <br />directed to the Glenwood pump station. <br />SYSTEM CHARACTERISTICS AND VALUATION <br />The total length of the wastewater collection system was about 717 miles as of 2019. Also, there are 27 <br />local pump stations and two regional pump stations located in Eugene and about 11 miles of pressure <br />lines within the system. In general, modern PVC pipe was not introduced until the early 1980s. Most pipe <br />installed prior to that time is concrete, clay, or truss pipe. Tables 3-1 and 3-2 indicate the years of <br />construction. Map 3-J shows the system by original year of construction.