Main Interceptor Rehabilitation and Combined Sewer Outfall Improvements Project

Current Work and Traffic Information:

Mill River Corridor 

Work in the Mill River Corridor is complete.

Connecticut River Walk and Bikeway

Work to repair three Combined Sewer Outfalls along the Connecticut River is complete. Restoration of the project site, including restoration of the River Walk and Bikeway, is in the final stages. For the ongoing safety of pedestrians and bicyclists, the Connecticut River Walk and Bikeway is closed from Liberty Street to Riverfront Park. Signs are posted to indicate the area where the path is closed.

UPDATE 2/2/18:  The River Walk is re-open to the public! Thank you to all our customers and all River Walk users for your patience and understanding during this important project.

Click here for the press release: 2/2/18

Click here for a PDF version of this update.

About the Project:

The Main Intercepting Sewer (MIS) is one of the most critical pipes within the sewer collection system, carrying flows for more than 60% of the City of Springfield. Average flows in the MIS exceed 20 million gallons per day. Inspection of the MIS as part of the Wastewater Collection System’s Asset Management and Maintenance Program indicated that the pipe required immediate rehabilitation in order to continue to provide service. Combined Sewer Outfalls at Worthington Street, Phelps Street, and Longhill Street were also identified as in need of repair.

The Main Interceptor Rehabilitation and Combined Sewer Outfall Improvements Project consists of rehabilitating 3,200 feet of 60 and 66-inch diameter sewer pipe and associated manholes, and work to rehabilitate and repair three CSO structures along the Connecticut River.

The project was advertised for bids in early 2015 and was awarded to P. Gioioso and Sons, Inc. of Hyde Park, MA. Construction began in the spring of 2015.

The majority of construction will occur along the Mill River which runs parallel to Locust Street and Mill Street. Click on this map to view the construction area and intersections where traffic delays are anticipated during construction:

Main Interceptor Traffic Map

The total project cost is estimated at approximately $23.4 million.