Water Street Sewer Interceptor Replacement Project

The Town of Plymouth has entered into a construction contract with Northern Construction Service, LLC of Palmer, MA, to complete the Water Street Sewer Interceptor Replacement Project.

The existing Water Street Sewer Interceptor is a 30-inch diameter reinforced concrete (RCP) sewer interceptor that was originally constructed in 1969 and serves as the primary pipeline for conveying wastewater flows from downtown Plymouth to the Water Street Pump Station. The interceptor is approximately 1,400 linear feet and is located within Plymouth Harbor. 

In 2021, the Town appropriated funds for the design and construction of the Water Street Sewer Interceptor Replacement project through the American Rescue Plan Act (ARPA) funding program. The Town retained Environmental Partners in the Fall of 2021 to complete the design and permitting for the interceptor replacement work. The replacement of the existing 30-inch RCP interceptor with a deep open-cut combined interceptor and gravity sewer on Water Street was selected as the most cost-effective solution that would best adhere to the Town's desired construction schedule of completing all work by the Summer of 2023. Construction is anticipated to begin on December 1, 2022.

A public informational meeting was held on November 10, 2022 where Town staff and Environmental Partners provided an overview of the project, including the anticipated construction schedule, and possible impact on the area. See the presentation (PDF).

Construction Updates

Construction began the week of December 8, 2022, near the rotary on Water Street. 

During construction, please expect to be inconvenienced by traffic delays, detours, uneven/settling trenches, parking restrictions, and elevated noise levels. Please follow the detour signs that are installed along the project area. Traffic detours will be modified as construction progresses towards the State Pier.

Please see the map for the detour pattern (PDF) that is currently in place.

A public informational meeting was held on May 19, 2023 where Town staff and Environmental Partners provided an update on construction and an anticipated schedule for upcoming work. See the presentation (PDF).

  1. Week Ending June 2, 2023

Construction activities for this week consisted of the following:

  • There were no activities on Monday (5/29) in observance of Memorial Day.
  • On Tuesday (5/30), Northern’s well driller (Northern Drill Service, Inc) drilled two boreholes along the interceptor alignment on Water Street. Northern’s geotechnical engineer (GeoEngineers) installed piezometers in the boreholes, monitored subsurface conditions, and recorded well drilling observations on-site during this drilling work.
  • On Tuesday (5/30), Wednesday (5/31), and Thursday (6/1), Northern’s relief well driller (Phoenix Foundation Company, Inc.) continued the drilling of relief wells along the interceptor alignment on Water Street. A total of 21 relief wells have been installed to date.
  • Northern and their well drillers plan on continuing their drilling operations along Water Street for the remainder of this week. The plan is to work on Friday (6/2) and Saturday (6/3).
  • Traffic continued to be detoured per the construction signage and the message boards provided for the project.
  • Site cleanup took place at the end of each day.

Northern will continue work onsite next week (week of June 5, 2023) and the following work activities are anticipated to occur:

  • Based on progress of the relief well system, Northern plans on continuing installation of the gravity sewer interceptor next week.
  1. Week Ending May 26, 2023
  1. Week Ending March 3, 2023
  1. Week Ending February 24, 2023
  1. Week Ending February 10, 2023
  1. Week Ending February 3, 2023
  1. Week Ending January 27, 2023
  1. Week Ending January 13, 2023
  1. Week Ending January 6, 2023