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MWMC FACILITIES PLAN <br /> <br /> ~WNIC Major Pump Stations <br /> <br />FIGURE 3,1.44 <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 rrtm~dng. <br /> <br />East Side Pump Station and Force Nlain 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 in fluent gravity sewer). The existing variable speed pumps have a <br />capacity of 17.5 mgd per pump, or 70 mgd with one ptuT~p out of service. The capacity is 80 <br />mgd with all of the pumps rtumLng. <br /> <br />West Eugene Pump Station and Force Main System <br />The West Eugene Pump Station System consists of seven pump stations cozmected 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 o_REVll DOC <br /> <br /> <br />