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.
For decades, airports have largely planned their fueling facilities around two familiar products: 100-octane low-lead aviation gasoline (100LL) for piston-engine aircraft and Jet A for turbine-powered aircraft. That landscape...
Christian Boisvert, PE, Hydraulic Engineer & Amateur Rugby Player What drew you to Hoyle Tanner? I really liked the size of the firm and the local office in Burlington,...
Infrastructure improvements continue at Clearbrook Condos, a 240-unit condominium community in Lincoln, NH, located across the river from Loon Mountain Ski Resort. What started as a conversation about aging...
We’re recognizing our November employee anniversaries and celebrating the 19 combined years these employees have spent growing, contributing, and making an impact at Hoyle Tanner.
In Fair Haven, Vermont, some sewer lines have served the community for nearly 120 years. Like many long-standing infrastructure systems, the collection system experiences a range of challenges. Aging...
Whether we're walking the dog, heading to work, taking our children to the bus stop, or enjoying New England's fall foliage, most of us are pedestrians at some point...
Demand for aircraft hangars is outpacing availability at many airports. According to the Aircraft Owners and Pilots Association (AOPA), 71 percent of airports across the country have reported a...
Stormwater is one thing people rarely think about until there is a problem. A flooded roadway, a washed-out culvert, standing water in a neighborhood, erosion along a streambank, or...
The Worcester-Elmore Route 12 Bundled Bridges Project has received the 2026 Northeastern Transportation and Wildlife Conference (NETWC) Innovation – Transformation Award. The recognition reflects an approach that treated bridge...
