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Drewville Bridge Replacement and Flood Mitigation

Rendered functionally obsolete, the previously deteriorating Drewville Road Bridge over the Croton River in Carmel, NY has been replaced with a more resilient and efficient structure.

McLaren’s Bridge Engineering team introduced a longer and wider design comprised of precast concrete adjacent box girders with a composite deck slab. Unlike the previous bridge which had only two steel girders, this new structure features a redundant design with many girders, increasing its safety and reliability.

Bridge Flood Mitigation + Resilient Design

The new design also serves to mitigate future flood damage. The replacement superstructure stands higher above the river and the elevation of the roadway profile on either side was raised. The existing bridge abutments were reused to protect the new abutments and channel the river in normal flow conditions. This new longer bridge with a raised profile allows for a larger hydraulic opening, in turn reducing the depth of the river during flood conditions. The adjacent box girder design provides a smooth bottom surface to prevent flood-borne debris becoming trapped, which was an issue with the original bridge. Additionally, stormwater will be redirected off the bridge to dry swales on either side.

The project was completed a full month ahead of schedule while coming in under budget.

Carmel, NY
Year Completed
Putnam County Department of Highways and Facilities