Major construction has been completed on the reconstruction of the bridge carrying US Route 1 over the Mamaroneck River in the Town of Mamaroneck, New York.
This bridge is part of the New York State Department of Transportation’s initiative, which also encompasses the East Lincoln Avenue bridge in Pelham, the Mount Vernon and Saw Mill River Parkway bridges over the Saw Mill River.
The $115m project, which commenced in 2020, involved an overhaul of the 129-year-old stone arch bridge.
New York governor Kathy Hochul said: “The reconstruction of the Route 1 bridge in Mamaroneck is the final piece of a transformative project that will keep travellers safe and help keep some of the busiest roads in the Lower Hudson Valley open and functioning regardless of the challenges that Mother Nature throws at us.”
The renovation included adding enhanced structural supports for improved durability, better flood resistance, and greater resilience against severe weather conditions.
The project aimed to upgrade several flood-prone bridges in lower Westchester County and is expected to fortify vital commuter routes against the growing impacts of climate change.
The reconstruction efforts also incorporated a cast-in-place concrete liner beneath the bridge and new foundation elements drilled into the underlying rock.
Additionally, the bridge was widened to include pedestrian walkways, improving safety and accessibility to nearby businesses, schools, and popular destinations in Mamaroneck.
Other updates were also made at the intersection of US Route 1 and Mamaroneck Avenue, including the installation of new traffic signals, pedestrian signals, kerb ramps, and crosswalks.
The project also addressed the replacement of retaining walls and the embankment supporting Meighan Park (Harbor Island Pocket Park) on the bridge’s south-west corner.
Due to the 6ft to 8ft tidal influx of the Mamaroneck River, the project required the use of divers and specialised equipment.
The new bridge structure was constructed using trusses that spanned the full width of the river beneath the existing bridge.
