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Mercer County to replace Cranbury Road bridge in West Windsor

Bridge in poor condition due to substructure defects

Post Date:08/15/2017 4:11 PM
TRENTON, N.J.—The Mercer County Department of Transportation and Infrastructure will start the replacement of the bridge on Cranbury Road (CR 615) over Bear Brook in West Windsor Township on Monday, Aug. 21. This project is to be completed in 270 calendar days, weather permitting.

Officially known as Bridge No. 762.1 on Cranbury Road, the structure is located between Stobbe Lane and Sunnydale Way.

The contractor has installed signs informing drivers that Cranbury Road will be closed to through traffic at the bridge for the duration of the project. The detour route for eastbound traffic from Route 571 will be left turn on Clarksville Road, left on Cranbury Road. For westbound traffic, left on Clarksville Road, right on Route 571 to right on Cranbury Road.

The existing bridge structure carrying Cranbury Road over Bear Brook is a four-span, simply supported, prestressed voided slab beams supported on steel piles. The bridge is in poor condition due to substructure defects; it was categorized as structurally deficient with a sufficiency rating of 48.2 on a scale of 0 to 100, with 100 being the best and 0 being the worst.

The replacement bridge will be a two-span structure supported on full height abutments and hammerhead pier. The proposed cross section at the bridge will consist of two 12-foot travel lanes, two 6-foot shoulders and two 6-foot sidewalks and four-rail bridge railing. The superstructure will consist of curved steel beams with a reinforced concrete deck composite section. The substructures will be founded on pile foundations with permanent scour sheeting.

Marbro Inc. of Montclair was the successful low bidder at $3,547,117. The contract was awarded on Aug. 10.

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