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Engineer outlines options to ease Front Street sewer backups; final recommendation due in December
Summary
Cochran Engineering told the Board of Public Works that the Walnut Street Lift Station likely cannot keep up with high-rain flows feeding Front Street, and proposed alternatives including a larger force main, higher-capacity pumps and on-site wet-well storage. Staff expects a final recommendation for the board’s December meeting.
TJ Garbes, a civil engineer with Cochran Engineering, told the City of Washington Board of Public Works on Oct. 28 that preliminary modeling shows the Walnut Street Lift Station likely lacks the capacity to handle peak wet-weather flows that back up along Front Street.
"That large 185-horsepower pump ... pumps about 2,800 gallons a minute," Garbes said, summarizing the station layout: an 18-inch gravity sewer feeding a 37-foot-deep wet well with two 60-horsepower day pumps and a single 185-horsepower wet-weather pump. The lift station discharges through a…
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