The Hillsborough Stone Arch bridge, also known as Sawyer Bridge, was built in 1866 by Rueben Loverin. The bridge carried US Route 202 until 1988 when it was bypassed with a new bridge upstream. As part of the new bridge construction, the third span of the bridge was removed due to its poor condition and to improve hydraulics in the area. After years of little use, the bridge was in need of a rehabilitation as it was experiencing bulging and leaning of its parapet walls.
Hoyle Tanner provided full inspection, rehabilitation design and construction phase services for this historic bridge. The bridge pavement and part of the roadway fill was removed and a buried membrane and drainage system installed to collect water and direct it away from the arches and parapets. Each bridge parapet was then partially reconstructed and a new pedestrian railing installed. Hoyle Tanner provided near full-time inspection and construction administration for this project which was partially funded by Transportation Enhancement and ARRA-related funding.
SERVICES
Preliminary Design
Final Design
Permitting
Contract Document Preparation
Construction Administration
Condition Assessment
From the blog
Learn about ongoing projects and the innovative processes we employ for our clients.
Meet Travis Gelinas - CADD Designer & Creative Craftsman What drew you to Hoyle Tanner? I previously worked for a company that supplied vending services to Hoyle Tanner and...
This work represents an important step in improving airfield operations and long-term efficiency at the airport. Our team is providing design and permitting services for new pavement, lighting, and...
Protecting federally listed bat species such as the Indiana bat (Myotis sodalis; IBAT) and Northern Long‑eared bat (Myotis septentrionalis; NLEB), has become an essential part of infrastructure planning and...
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...
