Southern New Hampshire Regional Water Project

Weston & Sampson was selected to assess the implementation of a regional water supply project in New Hampshire that would connect seven community water systems and improve access to drinking water for the regional stakeholders.

Our team provided a range of services, including water quality assessments, water demand estimations, regional water system hydraulic modeling, and feasibility assessments. We conducted life cycle cost analysis to evaluate the full impact of design decisions to better gauge the long-term viability of each feature. We designed seven different construction contracts for public bidding including 26,500 linear feet of new 20-, 16-, and 12-inch diameter water mains; three pressure-reducing valve facilities; a booster pump station with chemical feed systems; and assisted with the conversion of a water disinfection process from chlorine to chloramines by upgrading nine well stations. This project is the largest water supply initiative ever undertaken in New Hampshire and included the creation and execution of an intermunicipal agreement between the seven regional partners.