Skip to main content
  • City of PORTSMOUTH NH
  • Department of Public Works
A A A
Department of Public Works
  • Operations Back Copy Created with Sketch.
    • Engineering
    • Geographic Information Systems
    • Parks & Greenery
    • ParkPortsmouth
    • Recycling Center & Solid Waste
    • Roads & Sidewalks
    • Stormwater
    • Transportation
    • Wastewater & Sewer
    • Water
  • Services Back Copy Created with Sketch.
    • Snowstorm Parking Info
    • Recycling Center
    • Waste Collection Schedule
    • Drinking Water Quality
    • Mosquito Control
    • Household Hazardous Waste Day
  • Resources Back Copy Created with Sketch.
    • Adopt-A-Spot
    • Billing Information
    • Catch Basins & Fire Hydrants
    • Permits & Applications
    • Portsmouth Click N' Fix
    • Post-Closure Landfill Monitoring
    • Water & Sewer Assistance Program
    • Snow Related Impacts & Notifications (CodeRED)
    • Water Efficiency Rebate Program
  • Projects Back Copy Created with Sketch.
    • Citywide Map
    • Capital Improvement Plan
    • Cate Street Bridge
    • Congress Street
    • Contract One Sewer Rehabilitation
    • Community Campus
    • Community Policing Facility
    • Edmond-Woodbury
    • Elwyn Park Sidewalks & Traffic Calming
    • Elwyn Road
    • Elwyn Road Side Path
    • Fleet Street Sewer Separation
    • Hampshire & Essex
    • Islington Creek
    • Lafayette Park
    • Mechanic St. Pump Station
    • Middle/Miller/Summer St
    • Pease Water
    • Pease WWTF
    • Peirce Island Road Resiliency
    • PFAS Treatment Study
    • Peverly Hill Road
    • Prescott Park Phase 1A
    • Rail Trail
    • Rte 1 Bypass-Coakley Intersection/Cate St. Bridge
    • Sidewalks
    • Sound Barriers
    • Vaughan Mall
    • Woodbury Ave.
    • Other Projects
  • MapGeo
  • Contact
  • Developments
  • City of Portsmouth
  • Public Works Home
  • Congress Street Infrastructure Project

Congress Street Infrastructure Project

Congress Street work area, week of April 20, 2026.

Subscribe

* indicates required
 
 

For the week of April 20, 2026:

  • Sewer and drainage installations continue to reduce Congress Street to one lane in the work area on Monday and Tuesday.
  • Water main installation starts towards the end of the week. 
  • Fleet Street closures will vary throughout the week when crews are working in the intersection of Fleet Street and Congress Street. Fleet Street will be closed either from Porter to Congress or from Hanover to Congress depending on the sequence of work. Message boards and traffic signs will be deployed in advance to notify motorists. Pedestrians will still be able to access and use sidewalks in the closure area. Businesses remain open and deliveries will be accommodated. Normal traffic circulation will be restored at the end of each workday.

Background

The project includes the full replacement of sewer collection, water distribution, and stormwater infrastructure from Maplewood Avenue to a point approximately 100’ beyond (East) of the Fleet Street intersection. This portion of work will also include the restoration of Congress Street in the fall of 2026 beginning after Labor Day.

Like the Vaughan Mall project, the work can be disruptive to pedestrians and traffic.  Similar barricades will be used as required to aid pedestrians in the vicinity of the work zones as were used during work in the Vaughan Mall work to maintain access to businesses.  Crews will maintain at least one lane of vehicular traffic and safe sidewalk passage; however, some work days will require the temporary closure of Congress Street and/or the Fleet Street intersection during working hours in which case detour routes will be established.

The City is proceeding with this work over the winter in an effort to limit impacts to businesses. It is expected that the major utility work and most significant impacts to businesses will be completed over the winter leaving temporary roadway and sidewalk reconstruction for the spring. Work is scheduled to take place daily, Monday through Friday but there may be brief interruptions if conditions become too severe for crews to work effectively.  

A pre-construction public information meeting for the project was held on December 9, 2025. For more information, visit the meeting presentation and the video recording.
 

Background

The work on upper Congress Street is the second part of Phase 1 of the sewer separation project of the Fleet Street Area that is being required by the City's Long Term Control Plan and Supplemental Compliance Plan. The project includes new water, sewer and drainage upgrades along with full streetscape rework and other pedestrian enhancements.

Given the scope of this larger Fleet Area project, it is being completed in phases: 

  • Phase 1, infrastructure work in the Vaughan Mall and upper Congress Street area that began September 1, 2025.
  • Phase 2, a new drain line down Maplewood Avenue to the drainage outfall at North Mill Pond and
  • Phase 3, Fleet Street from Hanover Street to Court Street.

Meetings

12.9.2025 Congress Street Public Information Meeting

12.9.2025 Congress Street Public Information Meeting

December 10, 2025

12.9.2025 Congress Street Public Information Meeting

Dave Desfosses
Dave Desfosses

Dave Desfosses

Project Manager: Engineering & Operations
(603) 766-1411
djdesfosses@portsmouthnh.gov
  • City of PORTSMOUTH Home >
blue public works seal

Department of Public Works

Home Office
680 Peverly Hill Rd, Portsmouth, NH 03801
Hours

Monday – Friday 7:30 AM - 3:30 PM

Phone
(603) 427-1530
Fax
(603) 427-1539

Resources

  • Drinking Water
  • Forms & Permits
  • Click N' Fix
  • Contact
blue public works seal

© 2026 - City of Portsmouth. All Rights Reserved. | Terms of Use | Disclaimer