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Sprain Brook Parkway Bridges over Route 119

This $21.3 million design-bid-build project involved the replacement of two bridges that carry the Sprain Brook Parkway (NB & SB) over NYS Route 119, in Westchester County, NY. Due to the high traffic volumes (AADT > 110,000), Accelerated Bridge Construction techniques were utilized to reduce the overall construction duration and maintain a high level of traffic capacity during construction with minimal delay. This included significant pre-stage construction work under the existing bridge. The accelerated construction staging allowed the Contractor to condense the schedule from a 3-year project to under 2-years.

Bullet Bridge Replacement
Bullet Accelerated Bridge Construction
Bullet Pre-Stage Construction
Bullet High-Volume Commuter Corridor

The Sprain Brook Parkway is a 12.6 mile long north-south parkway located in Westchester County, New York. It serves as a major commuter route connecting the Bronx River Parkway in the City of Yonkers to the south and merging with the Taconic State Parkway to the north. The Sprain Brook Parkway intersects with Interstate I-287, a major east-west corridor, in the Village of Elmsford. This interchange is located immediately north of the subject bridges replaced under this project with access ramps located within the project limits.  

The work was completed using a significant amount of pre-stage construction. Due to the existing high vertical underclearance (38-feet) over NYS Route 119, the majority of the substructure elements, including mechanically stabilized earth system (MSES) concrete abutments and wingwalls were completed during pre-stage. This dramatically facilitated the removal and replacement of the superstructure, which was accomplished in three-stages utilizing median crossovers to maintain three travel lanes in each direction at all times. The proposed bridges are wider than the existing to eliminate non-standard shoulders and the northbound vertical profile was improved to meet minimum stopping sight-distance requirements.

The Sprain Brook Parkway is a high volume commuter corridor that necessitated a high-level of capacity during all phases of construction. The relative height and span configuration of the existing structure provided an opportunity to pre-stage the substructure work underneath the existing structure while maintaining traffic above and below.