Site Navigation

Customer Login

Need help logging in?

Did You Know?

A dairy cow must drink 4 gallons of water to produce 1 gallon of milk.

South Boston Sewer Separation Project

west broadway
West Broadway and A Street


The Boston Water and Sewer Commission’s (the Commission) South Boston Sewer Separation Project involves separating the combined sewer system in the vicinity of West Broadway and A Street. The purpose of this project is to reduce pollution levels in Boston Harbor by substantially decreasing the number and volume of combined sewer overflows (CSOs) into the Fort Point Channel and Boston Harbor.

Project Updates

No Project Updates at this time.

Combined sewers are found in many older cities and carry both sanitary sewage and stormwater in the same pipe. During dry weather, sanitary flows are conveyed to interceptor sewers that transport the sewage flows to a wastewater treatment facility. During wet weather, the stormwater gradually takes up the greater portion of the space in the pipe and, depending upon the duration and intensity of the storm, may exceed the capacity of the combined sewer system. The excess combined flows are transported to overflow conduits that discharge into a local body of water, in this case the Fort Point Channel and Boston Harbor. The resulting discharge of both sanitary sewage and stormwater flows from these overflow pipes is known as a CSO (combined sewer overflow).

Overflows from the South Boston and A Street area discharge to the Fort Point Channel through the BOS 072 and BOS 073 outfalls. This sewer separation project will replace the existing single combined system with two separate systems – one for sanitary sewage and one for stormwater. When construction is complete, sanitary sewage will be conveyed via the South Boston Interceptor to the MWRA’s Deer Island Wastewater Treatment Plant, while stormwater will be discharged to the Fort Point Channel via the existing conduit resulting in a substantial reduction in CSOs. As a result, the impact on the Fort Point Channel and Boston Harbor from the harmful effects of pollution from CSOs will be substantially reduced.

In addition, the Commission is concurrently replacing water mains in the area to minimize impacts by reducing the need to return at a later date to complete the work.

Project Area

South Boston Sewer Map South Boston Water Map

The South Boston Sewer Separation Project encompasses an area roughly bounded by West Broadway to the south, Dorchester Avenue to the west, West First Street to the north and Haul Road to the east. A map of the contract area is attached for reference. Land use in the project area is characterized by residential neighborhoods, commercial and industrial businesses, distribution centers and small businesses.

Scope of Work (Contract No. 12-309-009)

South Boston Sewer Separation Project Contractor:

RJV Construction Corporation, Canton, MA

The work includes installation of the following:

  • 5,700 feet of sanitary sewers and storm drains
  • 3,600 feet of water mains
  • 7,500 feet of sewer lining

Building Disconnections

In addition to separating combined sewers in the street, this project will disconnect as many individual building downspouts and laterals from sewers as is cost effective. Building laterals are pipes that connect a building’s internal plumbing to pipes in the street. Many older buildings in the area have an internal pipe that collects stormwater from the roof and discharges it into the building sewer lateral. Downspouts also collect stormwater from the roof in pipes that run down the sides of buildings. In some cases, these downspouts discharge into the sewer, rather than splashing to the ground. Since the purpose of this project is to remove as much stormwater from the sewer system as possible, these building downspouts will be disconnected, where feasible. This work will be coordinated individually with building owners, as necessary.

Temporary Restoration

Temporary restoration of roadways, sidewalks and other areas disturbed by construction will be completed under this contract. Permanent restoration will occur under a separate paving contract.

Overall Schedule

  • Clean and televise existing pipes – September to October 2013
  • Construction start – September 2013
  • Construction completion – April 2015

Project Coordination and Contruction Activity

The Commission is committed to working closely with the Mayor’s Office; elected officials; Boston Public Works Department (BPWD), Boston Transportation Department (BTD) and other City departments; the Massachusetts Bay Transportation Authority; the MWRA and other public and private utility companies; state and federal regulatory agencies; and, most importantly, with abutters to ensure the project is successfully completed. Extensive coordination with National Grid and NSTAR will be required to facilitate utility relocations or replacements, as necessary. Effective coordination will also help mitigate many short-term construction related impacts that may be associated with the project.

The Commission will adhere to all city and state regulations and ordinances governing construction in public roadways. All dust, debris and excavate will be strictly controlled and monitored.

Community Relations Program

The Commission is committed to a proactive community relations program during construction of this project. The program is designed to keep residents, businesses and elected officials informed about the project by holding public meetings, placing notices in local newspapers and posting updates on the project webpage, which can be found on the Commission’s website at Prior to the start of construction, public meetings will be held to introduce the contractor and provide specific information and anticipated schedules for upcoming work. In addition, before construction begins on a street, a notice will be sent in the mail announcing the work to be performed on the street. Project staff will meet periodically with residents, businesses, civic groups, and elected officials to provide updates, as requested or appropriate. Commission staff will work closely with affected neighborhoods regarding issues such as pedestrian and vehicular traffic management, access to residences and business establishments, and maintaining access for deliveries and trash and snow removal.


For further information on the project or to be added to the mailing list, please contact:

Boston Water and Sewer Commission - 617-989-7000

Irene McSweeney, Director of Construction

Steve Johnson, Project Engineer - Mass Ave. Roxbury

Sean Canty, Intergovernmental Relations Manager

If you have questions or concerns about construction, please contact:

Project Field Office:

Myles F. Johnson, Construction Manager

Benjamin Skrabak, Resident Engineer

CDM Smith

50 Newmarket Square, 2nd Floor 617-592-0490

RJV Construction Corp.

Victor Pacella, Jr.


In an emergency, contact BWSC's 24-hour, 7-day a week number at 617-989-7000.