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: Al Pratt, P.E. Water Resource Manager 603.766.1538
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
Collins Wellfield Improvement New Groundwater Well
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.
This project will provide an additional well in the Collins Wellfield to provide resilience to this supply source and regain the production capacity of this site to 450 gallons per minute. A pumping test on the new well (Collins Well 2) has been conducted and the consultant is preparing the hydrogeological report for submittal to the NHDES as part of the permitting process.
Status: Collins Well 2 has been constructed and permitting is underway
Project Manager: Al Pratt, Water Resource Manager 603.520.0622
Start Date: January 2019
Estimated Time of Completion: August 2023
Estimated Cost: $524,000
Funding Source: Capital Improvement Funds
Designer/Contractor: Consultant - Emery & Garrett Groundwater Investigations