Projects

Water Mains across Little Bay

This project consists of design and construction of 24-inch water transmission mains beneath Little Bay to replace existing mains. Investigations have identified degraded conditions of the existing water mains and valves. 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 over winter 2023 - 2024

Project Manager: Zach Cronin, Assistant City Engineer, 603.610.7304

Start Date: Design: 2020

Estimated Time of Completion: Design 2023, Construction 2023-24

Estimated Cost: Engineering & Design: $7,945,000 (July 2021 cost estimate)

Funding Source: Capital Improvement Funds and $600,000 EPA Community Grant Funding

Designer/Contractor: Wright-Pierce/TBD

Madbury Well Improvements

The project consists of the construction of a control building to connect replacement Well 4r and recently-installed Well 5 to the distribution system. Construction includes pipes, meters, controls, valves and chemical feed equipment. This project also involves upgrades to the existing wells #2 and #3 in the Madbury wellfield.

Status: Under construction

Project Manager: Al Pratt, Water Resource Manager 603.520.0622

Start Date: 2021

Estimated Time of Completion: August 2022

Estimated Cost: $1,800,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Underwood Engineers/Northeast Earth Mechanics

Collins Wellfield Improvement New Groundwater Well

This project resulted from new water supply source investigations. Test wells were drilled in areas around the existing Collins Well to determine the potential for enhancing productions from its associated aquifer. The capacity of the existing Collins Well has declined since it was installed and historical data indicates greater yield potential from this aquifer.

Status: Well-drilling and construction is ongoing

Project Manager: Al Pratt, Water Resource Manager 603.520.0622

Start Date: January 2019

Estimated Time of Completion: August 2022

Estimated Cost: $524,000

Funding Source: Capital Improvement Funds

Designer/Contractor: Consultant - Emery & Garrett Groundwater Investigations