North Sterling Road Bridge over Quanduck Brook —
A bend in the Quanduck Brook about 100 meters downstream from the North Sterling Road Bridge caused winter ice jams which backed up to the roadway causing uplift on the structure. The solution was to widen the bridge opening and slightly raise the lower bridge chord without adverse flood management impacts and minimizing the impact on roadway geometry. There is a 20-square mile watershed upstream of the structure.
The replacement bridge has a 15-meter clear span and a 7.2-meter roadway width. The bridge has new prestressed concrete deck units, and the new concrete abutments and wingwalls are founded on driven piles.