New Boston Main Interceptor Rehabilitation Project

South Boston

More than 3,000 acres from City neighborhoods, including Roxbury, South End, South Boston and Downtown.

Contract Number:

21-309-005A

Project Summary

The New Boston Main Interceptor (NBMI) is a critical part of the BWSC’s wastewater system, carrying sewage and stormwater from more than 3,000 acres from City neighborhoods, including Roxbury, South End, South Boston and Downtown.  Due to severe degradation the NBMI system needs to be rehabilitated. The goal of this project is to rehabilitate a 500-foot portion of the existing 102” NBMI sewer system and four major sewer structures.  The sewer system is approximately 25’ to 35’ deep, and rehabilitation work is being done in a “trenchless” manner to avoid deep excavation along the pipe length. However, rehabilitation of the structures will require establishing and occupying work zones for an extended amount of time.  Impacts to traffic are anticipated around the work zones. Work is being coordinated with the MassDOT project on Dorchester Avenue and the Boston Park and Recreation Department’s Moakley Park project.  Construction for this contract began in October 2022.   

Area impacted during construction include Southampton Street from Ellery Street to Dorchester Avenue, Preble Street from Dorchester Avenue to Rogers Street, Dorchester Avenue between Preble Street and Dorchester Street and an isolated area within Moakley Park near 1187 Columbia Road. 

Anticipated Project Duration:

Preliminary Design: Complete
Final Design: Complete
Construction: Fall 2022 to Winter 2023

Project Location