The Swansea Desalination Project included the development of a new surface water intake in a coastal, tidal river, a new water treatment plant, a new river diffuser, storage tanks, pumping stations and several miles of pipelines. Hoyle Tannerwas program manager and lead engineer for this innovative project. The treatment plant treats brackish water from the Palmer River and an existing well supply. The river water receives microfiltration pre-treatment for the reverse osmosis desalination process. The well supply is aerated andfiltered using microfiltration to reduce carbon dioxide, iron and manganese and remove organic precursors that result in chlorinated disinfection byproducts. The treated well water is then blended with the desalted river water to provide pH stabilization. The treatment plant is sized to produce 2.2 mgd. Waste streams produced discharge to on-site solids dewatering lagoons and the river.
SERVICES
Initial Source Testing
Feasibility Assessment
Program Management
Permitting
Treatment Pilot-testing
Design
Bidding Administration
Construction Administration
Resident Project Representation
State Funding
From the blog
Learn about ongoing projects and the innovative processes we employ for our clients.
For communities along Lake Champlain, phosphorus reduction is not abstract policy — it is an ongoing operational responsibility. MS4 permit requirements, public expectations, and watershed protection goals all converge...
In northern climates, winter is more than a season – it's a construction variable. For airport projects in particular, cold-weather conditions can shape schedules, budgets, and even the quality...
Key Takeaways from The Wildlife Society’s Recent Webinar The Wildlife Society recently hosted a national webinar (led by Dr. Patricia Cramer) focused on the growing importance of wildlife connectivity...
Insights from the People Who Support Your Ground Transportation Infrastructure Every Day As we head deeper into 2026, we asked our ground transportation team one simple question: “What do...
Hoyle Tanner is currently providing wastewater engineering design services for the Town of Richmond, Vermont, to assess and develop alternatives which address the urgent need to upgrade the existing...
Hoyle Tanner’s Chelmsford office expansion is officially complete! After months of planning and coordination, construction was completed earlier this year to expand the office footprint, including the removal of...
We’re proud to announce that Jeffrey “JJ” Hollstein has earned his Professional Engineering (PE) license! JJ is a structural engineer in our Ground Transportation Division (Chelmsford office), where he...
As we close the chapter on 2025, we’re proud to reflect on a year defined by meaningful progress for our teams, our clients, and the communities we serve. Across...
