Construction Inspection Support Services for the Replacement of Three Overhead Bridges

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LKB has been retained by the New York State Thruway Authority to provide construction inspection support services for the replacement of three overhead bridges in their New York Division. This project involves the complete removal and replacement of the Hungry Hollow Road, Scotland Hill Road, and College Road Bridges over the New York State Thruway with completely new structures. These bridges are being replaced as they have been repeatedly impacted from trucks traveling on the Main line Thruway (I-87) below. In order to avoid any future impact damage, each bridge is being completely replaced, and the existing vertical clearance between the Thruway (I-87) and each bridge is being increased by approximately 3 feet. The bridges are located in the Town of Ramapo at the following locations:

MP 24.62 Hungry Hollow Road, a four simple span superstructure consisting of steel stringers with a reinforced concrete deck supported on concrete abutments and piers.

MP 26.37 College Road, a four simple span superstructure consisting of steel stringers with a reinforced concrete deck supported on concrete abutments and piers.

MP 23.62 Scotland Hill Road, a six simple span superstructure consisting of steel stringers with a reinforced concrete deck supported on concrete abutments and piers.

MP 24.62 Hungry Hollow Road was replaced first. Currently, MP 23.62 Scotland Hill Road are being replaced simultaneously. The Hungry Hollow and College Road replacement structures will accommodate two travel lanes, two shoulders, and a 5’-0” sidewalk to accommodate the heavy pedestrian use. The new bridge configurations will utilize a two-span continuous superstructure with high abutments and a median pier. Pedestrian traffic will be maintained on-site utilizing a temporary pedestrian bridge.

The Scotland Hill Road replacement structure will accommodate two travel lanes and two shoulders. For all three bridges, the over-roadway profiles will be raised to meet the 16’-6” minimum vertical clearance requirement. The new bridge will utilize a three-span continuous superstructure with integral abutments and two median piers (one in the mainline median and one in the gore between southbound mainline and the southbound ramp to the Garden State Parkway). The approach roadways will be reconstructed at each end to accommodate the new bridge. During construction, vehicular traffic will be maintained on off-site detours.

The construction inspection services include overseeing the placement of work zone traffic control along both the mainline I-87 and the local roadway that crosses over I-87 at each bridge, at both Hungry Hollow Road and College Road.