Contract One Sewer Rehabilitation

Construction on the Contract One Sewer Rehabilitation Project began Wednesday, March 18. The Sanitary Sewer System Rehabilitation and Improvements – Contract 1 project is required by the City’s Consent Decree with the United Stated Environmental Protection Agency. The purpose of the project is to remove Inflow and Infiltration (I/I) in the City’s sewer collection system. I/I is when stormwater and groundwater enter the sewer collection system through deterioration in the sewer pipes or manholes. This results in increased sewer flows, more frequent Combined Sewer Overflow (CSO) events, and increased sewer costs through pumping and treatment of otherwise clean water. The City accepted funds through the American Rescue Act Plan (ARPA) to assist with costs related to design and construction. The ARPA funding deadline means the project must be completed by April 1, 2026.

  • Middle Street

  • As part of the Contract 1 Sewer Rehabilitation project, the City is investigating a section of sewer pipe between Richards Avenue and #180. Starting Monday, April 13, traffic will be rerouted while test pits are dug to determine the scope of work

  • Blue Heron Avenue

  • Contract 1 work is also planned for this area, starting the week of April 13.


Project Manager: Zach Cronin, P.E., Assistant City Engineer, 
Office: (603) 610-7304
Cell: (603) 957-8795
Email: zmcronin@portsmouthnh.gov