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2020 Eugene Wastewater Master Plan Chapter 7: Major System Expansion 53 South West Eugene (SW) The South West Basin flows north to the Bethel Basin and is serviced by the Terry Street and Barger pump stations. Future development within this basin should not trigger major pump station upgrades. The South West Eugene Basin has three distinct areas for wastewater development: • West 11th/Crow • Willow Creek/18th Avenue • Bailey Hill/Gimpl Hill Roads The West 11th/Crow area has approximately 370 acres of underdeveloped or undeveloped land. The current service plan for this area, shown on Map 7-B, does not vary drastically from the 1992 USSMP. The Willow Creek/18th Avenue area, shown on Map 7-C, has approximately 230 acres of underdeveloped or undeveloped land. Due to the extensive protected wetlands in this sub-basin, the only wastewater line greater than 10 inches is planned to extend down Willow Creek Road approximately 1800 feet. The Bailey Hill/Gimpl Hill Road area is approximately 155 acres of underdeveloped or undeveloped land. The 1992 Master Plan indicated that a gravity wastewater line be constructed north from Gimpl Hill Road, and then west down 18th to Willow Creek Road. Since that plan, all of the land between Gimpl Hill Road and 18th has been identified as protected wetlands. Constructing this wastewater line would be cost prohibitive due to the environmental impacts of constructing in the wetlands. The master plan for this area, as shown on Map 7-D, includes a new pump station, located along Gimpl Hill Road. A pressure main would pump the wastewater to the top of Bailey Hill Road, and allow flow by gravity to the existing system. Preliminary analysis indicates that the pipe running north to 18th Avenue has capacity for this change from the 1992 plan. Other than these improvements, no wastewater lines greater than 10 inches are required in this basin. Highway 99 Industrial Area (SI) With the exception of the Prairie Road pump station and the gravity wastewater line extending to the north, most of the improvements indicated in the 1992 USSMP have yet to be built. Map 7-E and Map 7- F show the updated service plan, which still includes two new pump stations. The northernmost pump station (PS-SI2) and the associated force main and gravity lines serve a single lot, currently owned by MWMC. The costs of these improvements would not be eligible for SDC credits. Willakenzie Area (WN) The Willakenzie North area is bounded on the west by the Willamette River, on the east by Interstate Highway 5, and on the south by Beltline Highway. There are two main undeveloped areas: North Delta Highway, and the County Farm/Coburg area. The North Delta Highway area has approximately 156 acres that is not currently developed. The service plan for this area is shown on Map 7-G. Generally, the area would drain to the Crimson Pump Station, which was built in 1997 and designed for this loading. The furthest northwest corner on the basin would require either extensive fill, or the construction of an additional pump station, which was not identified in the 1992 USSMP. In addition, the pump station and associated force main and gravity lines would only serve this lot and therefore are not eligible for SDC credits. The County Farm/Coburg area has many underdeveloped or undeveloped parcels. Wastewater service for this area was originally designed in the 1992 Wastewater Master Plan. Much of those improvements