Projects

Construction Projects

Grafton Road Drinking Water Treatment Facility

Upgrade water treatment facility for the Haven, Smith, and Harrison Wells which serve the Pease Tradeport drinking water system. These wells were found to be contaminated with PFAS compounds in 2014. The Haven Well had levels above the drinking water advisory standard and has been off-line since 2014. An activated carbon filter system was installed in September 2016 to treat the Smith and Harrison Wells. The US Air Force has authorized funds for the City of Portsmouth to design and construct the final treatment system that will treat water from the Smith, Harrison, and Haven Wells. Construction began April 2019.

Status: Completed

Project Manager: Al Pratt, Water Resource Manager 520 - 0622

Estimated Start Date: Construction: Spring 2019

Estimated Time of Completion: Opened May 4, 2021

Estimated Cost: $14,300,000

Funding Source: The Air Force is reimbursing the City for the capital costs associated with these projects because the cause of the contamination was due to firefighting foam used by the Air Force when Pease Air Base was active from the 1950's to the 1990's.

Designer/Contractor: Weston & Sampson/Kinsmen Corporation

 

Surface Water Treatment Plant – Backwash Tank

This project consists of the construction of a backwash tank and a wash water recycle pumping station at the Surface Water Treatment Plant in Madbury. These upgrades will provide for more consistent and efficient operation of the treatment processes. The backwash tank increases the total water storage capacity at the plant and increases the resiliency of the water supply. This project also provides an additional treatment option during times of the year when the water quality in the Bellamy Reservoir is degraded as a result of mixing. 
 

Status: In construction

Estimated Time of Completion: August 2021

Estimated Cost: $3,032,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Hazen/NE Earth Mechanics

 

UPCOMING PROJECTS

Water Mains across Little Bay

This project consists of design and construction of water transmission mains beneath Little Bay to replace existing mains. Preliminary investigations of the existing water mains and valves have identified degraded conditions. Due to the importance of this water main, this project is necessary to ensure water is continuously supplied from Madbury to Portsmouth and service is not disrupted.

Status: In design. Construction anticipate over winter 2021 - 2022

Project Manager: Al Pratt, Water Resource Manager 520 - 0622

Estimated Start Date: Design: 2020

Estimated Time of Completion: Design 2021, Construction 2022

Estimated Cost: Engineering & Design: $750,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Wright-Pierce/TBD

 

Madbury Well Improvements

The project consists of construction of upgrades of meters, controls, valving, and chemical feed equipment for the connection of the newly installed Well 4 and Well 5 replacement wells and upgrades to the existing wells #2 and #3 in the Madbury wellfield.

Status: In design

Project Manager: Al Pratt, Water Resource Manager 520 - 0622

Estimated Start Date: 2020

Estimated Time of Completion: 2022

Estimated Cost: $2,200,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Underwood Engineers/TBD

 

New Groundwater Well

The purpose for this project is to drill test wells, determine well yields, and evaluate water quality and sustained yield potential with respect to the feasibility of developing a water supply source that improves the capacity of the Portsmouth water system. Additional work under subsequent projects may include construction of final production well(s), new source permitting, and the design and construction of treatment, pumping, and piping systems.

Status: A Request for Proposal for consultants to perform this work was issued in early 2017 and a consultant was selected. Test well drilling began in the Fall 2019.

Project Manager: Al Pratt, Water Resource Manager 520 – 0622

Estimated Start Date: January 2019

Estimated Time of Completion: TBD

Estimated Cost: $520,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Consultant - Emery & Garrett Groundwater Investigations