WESTPORT WATER POLLUTION CONTROL FACILITY UPGRADE (CONTRACT NO. 61), WESTPORT, CT

Owner: Town of Westport
Engineer: Stearns & Wheler LLC
Contract Amount: $26,684,207
Completion Date: November 2007

Construction of the Westport Water Pollution Control Facility Upgrade and related improvements

Phase I

• Construct secondary clarifier complex, clarifier distribution box, UV and Parshall flume structure, post-anoxic/reaeration tanks, new outfall manhole and major electrical distribution equipment
• Demolish septage blowers and odor control system in the basement of the septage and chlorination building
• Install re-aeration blowers and associated piping
• Construct sodium hypochlorite room and boiler room in septage and chlorination building
• Construct 24-inch influent force main and meter vaults
• Construct modifications to pump station No. 17 and connect to new 24-inch force main
• Connect other two force mains from East to new 24-inch force main
• Install scum piping
• Install new RAS piping
• Construct reactor effluent piping
• Install temporary provisions to monitor alarms on completed systems
• Conduct final testing on all tanks and equipment to make ready for start-up
• Complete landscaping and final grade

Phase II

• Demolish existing secondary clarifier complex, chlorine contact tank and Parshall flume structure
• Demolish existing aeration tank effluent distribution box and seal channel opening to maintain operation of aeration tanks
• Construct reactor No. 2, reactor distribution box and RAS distribution box and all facilities common to both reactors
• Construction of new pump chlorination facility and demolition of septage and chlorination building
• Install tee and valve on 24-inch force main
• Conduct final testing on all tanks and equipment
• Complete landscaping and final grade

Phase III

• Construct/provide and coordinate temporary sludge thickening facilities; pump scum to septage tanks; provide temporary facilities for plant personnel during rehabilitation of control building
• Demolish existing aeration tanks, primary clarifier complex and headworks
• Construct new influent building and reactor No. 1
• Perform rehabilitation work on control building
• Install major electrical distribution equipment including switchgear, generator and fuel tank
• Perform all modifications to sludge handling complex and waste and thickened sludge storage tanks
• Construct new sludge loading area, storage building and modifications to odor control biofilter system
• Conduct final testing on all tanks and equipment