Pawling Avenue Bridge

Troy, NY

The Pawling Avenue Bridge over the Poestenkill in Troy, New York, is a historical, double-arch, earth-filled, stone-masonry structure. Constructed in 1875 with a cobblestone deck, cantilevered wooden sidewalks, and at least one set of trolley tracks, the bridge was converted in the 1920s when the tracks were removed. It now has a bituminous pavement deck with a concrete sidewalk on each side. Because of the continuing movement of the spandrel walls and the deteriorating condition of the bridge, the New York State Department of Transportation awarded a contract to Ryan-Biggs to evaluate the condition of the bridge and develop a rehabilitation scheme. We developed a procedure to restore and reinforce the spandrel walls and waterproof the extrados of the arches while maintaining two lanes of traffic on a temporary bridge above the arches. Services of buried telephone, gas, and water lines were also maintained during construction. With the approval of the New York State Office of Parks, Recreation, and Historic Preservation, stone masonry from the original spandrel walls was restored as a stone facing on the new concrete spandrel walls.