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MWMC FACILITIES PLAN <br /> <br /> MWMC Major Pump Stations <br /> <br /> rvington <br /> ~l [] Springfield <br /> <br /> I~'''"r~l Urban Growth BoundarV <br /> <br />B Dill- <br /> <br /> FIGURE 3.1.4-1 <br /> MWMC Facilities Plan, Eugene-Springfield <br /> <br /> West Bank Gravity System and WPCF Screw Pumps <br /> The existing 72-inch WBI gravity sewer conveys up to 100 mgd to the WPCF directly to the <br /> existing screw pumps. Flows are controlled by the upstream gravity conveyance system and <br /> the Fillmore pump station. At the WPCF, four existing screw pumps lift the flow into a <br /> common channel that flows into the influent screens and aerated grit removal process. <br /> These existing screw pumps have a capacity of 21 mgd per pump, or 63 mgd with one <br /> pump out of service. The capacity is 84 mgd with all of the screw pumps rtu'mh-~g. <br /> <br /> East Side Pump Station and Force Main System <br /> The East Side pump station and force main system consists of the Willakenzie pump station <br /> and force main trader the Willamette River. The existing Willakenzie pump station consists <br /> of two pump stations linked together to convey wastewater flows from the 78-inch East <br /> Bank Interceptor (the influent gravity sewer). The existing variable speed pumps have a <br /> capacity of 17.5 mgd per pump, or 70 mgd with one pump out of service. The capacity is 80 <br /> mgd with all of the pumps rttm~ing. <br /> <br /> West Eugene Pump Station and Force Main System <br /> <br /> The West Eugene Pump Station System consists of seven pump stations cormected by a <br /> series of parallel force mains. Force main sizes range from 14 inches to 48 inches in diameter, <br /> rtmning generally west to east from the Barger-Greenhill pump station to the WPCF. All of <br /> the pump stations connecting to the force mains have been included in this evaluation <br /> <br /> 3-4 MWMC_3.0_REV11. DOC <br /> <br /> <br />