Elimination of Tidal Inflow—Bridgeport, CT

by David J. Anderson, Watermation Inc, St. Paul, MN, USA,
Robert C. Kalm, Watermation Inc, St. Paul, MN, USA,
James R. Carr, Watermation Inc, St. Paul, MN, USA,

Document Type: Proceeding Paper

Part of: Environmental Engineering


Using a program of sewer gauging, chloride sampling, sewer system analysis and treatment plant record review, it was determined that Bridgeport's old tide gates allowed 19 million gallons per day of sea water into the sewers. Plant performance suffered because of the twice daily tidal inflow peak, when nearly half the influent was water from Long Island Sound. A design for new gates and a performance (level) monitoring system was prepared and bid. Construction began early in 1985 and is now complete. Performance to date indicates that the new gates, coupled with a monitoring system which facilitates maintenance crew dispatching, has essentially eliminated tidal inflow. (Author abstract. )

Subject Headings: Tides | Inflow | System analysis | Water treatment plants | Gates (hydraulic) | Wastewater management | Chloride | Bridge tests | Connecticut | United States

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