Phase I Wastewater Treatment Upgrade – CSO/Wet Weather

2009 Groundbreaking 1

This project signifies the start of the first phase of what could potentially be a multi-phase, plant-wide upgrade of the City of Norwalk’s Water Pollution Control Facility. If fully completed, the Norwalk WPCF may be a leader in the State of Connecticut’s goal of improving the quality of Long Island Sound through the substantial reduction in the discharge of harmful nutrients and improved water quality. Phase 1 is budgeted at a total design and construction cost of $37 million. The project is being funded from the State’s Clean Water Fund.

This project included the installation of a new preliminary treatment facility that will provide screens, pumping, and grit removal. The new facility will also provide improved treatment for the extraneous flow the plant receives during wet weather events. A major highlight of the project will be the construction of a 25-foot+ deep structure supported by hundreds of concrete piles in complex soil conditions. The project also includes a number of “green” initiatives including premium efficiency motors, high efficiency fluorescent lighting, a building structure that will meet or exceed the current insulation requirements set forth by the Connecticut State Building Code, and an innovative “Solarwall” that will use solar energy to reduce the building’s heating requirements.

The project has been a collaborative effort through the design process and will continue through construction. The project has benefited by utilizing the strengths of the project team in a workshop environment to gather input and develop buy-in on alternatives. This enabled the project team to complete the design in less than a year and bid the project with minimal clarifications.

The project team includes:

Owner: City of Norwalk Water Pollution Control Authority
Engineer: Camp Dresser & McKee, Inc.
Construction Manager: Gilbane Building Company
Operator: CH2M Hill/OMI
State: Department of Environmental Protection