News and Updates | Recreational Info | Project Area | Construction Route |Media (YouTube) | Wastewater Home
This project is the largest that the City has undertaken. The Peirce Island Wastewater Treatment Facility (WWTF) upgrade expands treatment at the plant to an advanced secondary process which removes organics and nitrogen. Progress videos are available on our YouTube page, shown below.

For more information on this project:

Donald Song, P.E, Project Manager,

Tel: (603) 610-7305
Email: dsong@cityofportsmouth.com

Terry Desmarais, P.E, City Engineer

Tel: (603) 766-1421
Email: tldesmarais@cityofportsmouth.com
To report an issue, please fill out a Report Form.

Public Meetings

Monthly public meetings with City staff, the Contractor and other officials involved in the project are typically held every third Wednesday each month at 11 a.m. in Council Chambers to ensure that citizens are informed; these meetings are broadcasted and available on the City’s YouTube channel, with presentations and notes available at Wastewater Public Meetings. The next public meeting is July 19.


The Coming Week

(Current Schedule 6/26/2017 - 6/30/2017)
Anticipated Construction Traffic Volume: High


This work this week will include, but not be limited to:
  • Rebar deliveries for Biological Aerated Filter (BAF) Building foundation
  • Place concrete for the BAF foundation and walls
  • Continue excavation and ledge removal for the BAF structure
  • Install Water Quality Structure and Diversion Structure
  • Replace 24" raw wastewater valve and demolish abandoned 30" Force Main & AIr Release Manhole
  • Install Gravity Thickener Scum Pump Station
  • Start demolition of the Filtrate Pump Station
  • Excavate for new Electrical Building and Emergency Generator
  • Install electrical manholes and ductbanks at the new Electric Building
  • Paint interior of the Headworks Building
  • Continue interior mechanical, electrical and plumbing work at the Headworks Building
  • Continue to export excavated materials off site
  • Deliver temporary operations trailers to site

 

Project Factsheet

  • Start Date: September 2016
  • BAF Substantial Completion: December 2019
  • Secondary Permit Compliance: April 2020
  • Project Substantial Completion: May 2020
  • Final Completion: August 2020
  • Project Construction Costs:
  • -Original Contract:      $72.786 million
    -Change Order No. 1:  $0.367 million
    -Change Order No. 2:  $0.547 million
    -Total Contract:          $73.700 million
    *For additional information on project costs and change orders, please contact Terry Desmarais, City Engineer
  • Design Engineer: AECOM
  • General Contractor: Methuen Construction
  • Design Flow: 6.1 MGD average
  • New Treatment Processes:
    • New Headworks
    • Biologically aerated/anoxic filter (BAF) using the Kruger BioSTYR ™ technology for Secondary Treatment and Nitrogen Removal
    • Rotary screw presses for solids dewatering

News and Updates

Recreational Impact Advisory


State Fish Pier: No restrictions – Open
Public Boat Launch: No restrictions. Open seasonally.
Four Tree Island Parking Lot: No restrictions - Open.
Four Tree Island : No restrictions - Open.
Off-leash Dog Area: Closed. No dogs allowed on Peirce Island from the bridge.
Peirce Island Outdoor Pool Access: Currently Unrestricted – Open seasonally.


Map of Project Area



Designated Map of Construction Traffic Route



Related YouTube Meetings

To view all the videos in the below playlist, click on the three bar icon on the top left.