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2020 Eugene Wastewater Master Plan Chapter 3: Existing Wastewater Systems 15 The remaining two pump stations (Greenwich and Division) pump into the 30- and 48-inch force mains to the treatment plant. Division is a medium-sized station. Increased development may require an upgrade to this station. The Greenwich station is a large station but the basin is almost fully developed so upgrades are unlikely to be required. Willakenzie Stations All of the flow from the Willakenzie area is pumped across the Willamette River by the Willakenzie pump station. The Willakenzie station is a regional station, maintained by MWMC. The other major station in the Willakenzie area is the Oakway pump station, which is located on St. Andrews Drive near Oakway Road. This station has a 500-foot-long pressure line that lifts the flow back into the gravity system in Oakway Road. It was relocated and reconstructed in 2001. The other four stations in the Willakenzie system are lift stations that serve fairly small, localized areas. All of these stations have two pumps, and no special issues are expected. Bethel Stations All of the wastewater from the South West and Bethel basins flows by gravity to the West Irwin, Terry Street and Barger pump stations in the Bethel basin. It is then pumped through two pressure lines (30inch and 42-inch diameters) that extend east from each pump station, about 3.5 miles along Jessen Drive and Beltline Road to the wastewater treatment plant. The West Irwin pump station was constructed in 1965 to serve the area annexed in 1964. This station has a limited wet well size, with an access-constrained drywell. In addition, the superstructure is unreinforced masonry that will not tolerate seismic activity. A replacement station is included in the City’s capital improvement plan to be designed in 2020 and constructed in 2021. The Terry Street pump station was constructed in 1984 to provide increased capacity for the South West basin. The station is in good condition, and major improvements are not likely to be needed in the planning period. The Barger pump station was constructed in 1998. This pump station, included in the 1992 USSMP, was built to facilitate development within the UGB and was sized to accommodate flows from the South West basin as well as areas outside the UGB identified as urban reserve. Since that pump station was constructed, vast tracts of land in west Eugene were set aside as part of the West Eugene Wetlands. In addition, areas previously identified as urban reserve are no longer considered to be part of the future development. For these reasons, the Barger pump station has significant reserve capacity. Central Eugene Stations Flow from three of the four large basins of the Downtown group reaches the treatment plant by gravity through the 72-inch West Bank interceptor. The Downtown West basin flows to the Fillmore pump station, which then lifts the flow into the West Bank interceptor. Originally constructed in 1960, major modifications were added to the Fillmore station in 1995. The other five pump stations serve small localized areas.