Projects

Construction

Peirce Island Wastewater Treatment Facility Upgrade Project 

The City’s Peirce Island Wastewater Treatment Facility is undergoing an upgrade. This project will convert the existing primary treatment facility to a secondary treatment facility with the ability to remove nitrogen. The project began in September 2016 and will continue until 2020. Details on the construction schedule and aerial photographs and videos of the construction can be seen by Clicking Here

Pease Headworks Upgrade

The Pease Wastewater Treatment Facility will receive a new Headworks Building as part of a construction project beginning in July 2018. The Headworks Building will house equipment that provides preliminary treatment to raw wastewater entering the treatment facility. This includes removal of rags and other debris through a wastewater screen, removal of sand and other debris in a grit removal device and raw wastewater pumping to lift the wastewater to the next phase of treatment. The project will also include new odor control system for the entire wastewater treatment facility. This will be done by incorporating two new carbon odor control system (carbon vessel, fans and ductwork); one system for the septage receiving, headworks and primary clarifiers and a second system for sludge storage and processing. Construction will take place over two construction seasons.

Upcoming Projects

Fleet Street Reconstruction 

This project includes the reconstruction of Fleet Street from Hanover Street to Court Street. This work will include roadway reconstruction, replacement of sidewalks, utility work including new storm drains, sanitary sewers, and water mains. The planning for this work will include planning for utility corridors and sewer separation in the Fleet Street area extending to Market Square and to Maplewood Avenue. 

Union Street Reconstruction

This project includes the reconstruction of Union Street from State Street to Middle Street. This project is part of the City’s continued sewer separation to reduce combined sewer overflows. The work will include roadway reconstruction, replacement of sidewalks, utility work including new storm drains, separate sanitary sewers, and water mains. The planning for this work will include an evaluation of the alignment for new drainage down Middle Street. This will provide an outlet for the stormwater discharge.

Sagamore Avenue Sewer Extension Project

In accordance with a September 2016 Peirce Island WWTF Consent Decree the City has begun planning a "2.5 million sewer extension project to provide public sewer service to approximately 83 existing parcels adjacent to our near Sagamore avenue, as depicted in the February 2011 Wright Pierce figure titled "Town of Portsmouth, New Hampshire Sagamore Ave South Sewer Extension Study, Low Pressure Sewer," with the intent to improve water quality at Sagamore Creek." The Consent Decree signed in September 2016 states that "Planning, design and other pre-construction activities for the project shall be completed prior to substantial completion of the Peirce Island WWTF upgrade project. Construction of the sewer extension project shall begin no later than June 30,2020 and shall be substantially completed on or before June 30, 2022."

A public information meeting on September 4, 2019 discussed the design of a new Low Pressure Sewer System (LPSS) ib Sagamore Ave North and the surrounding unsewered roads. The roads in the design include Sagamore Ave,m Shaw Road, Cliff Road, part of Walker Bungalow Road, Sagamore Grove and Wentworth Road, as shown on the map below.  

Sagamore Ave sewer extension project.