H&H provided preliminary, final design, and construction phase services to DelDOT for the rehabilitation of the electrical systems and repairs to the structural and mechanical components of two bascule bridges.
At the Rehoboth Avenue Bridge (# 3-153), the rehabilitation includes replacing the following electrical components: primary thyristor drives, main motor, conduit, switches, conduit, relays, control system and desk, electrical cabinets, security cameras, as well as upgrading the incoming utility service. The mechanical rehabilitation includes maintenance repairs to eliminate leaking oil and grease from reducers, bearings, and couplings throughout the span drive machinery and center lock machinery. The work also includes rehabilitation of a center lock machinery reducer, adjusting the centering guide wear plates and modifying the center lock machinery receiving socket. The project will provide a widened bicycle path on the north sidewalk of the bridge. H&H’s staged construction and MOT scheme will allow uninterrupted traffic flow during the rehabilitation of the bridge.
At the Savannah Road Bridge (# 3-154), the rehabilitation includes replacing the following electrical components: primary drives, main motor, conduit, switches, conduit, relays, control system and desk, electrical cabinets, security cameras, traffic signals, as well as upgrading the incoming utility service. Mechanical rehabilitation includes replacing the span drive machinery brakes, center lock machinery, and maintenance repairs on the machinery reducers and couplings to eliminate leaking oil and grease from the machinery components. H&H is providing MOT schemes to manage the temporary and full-bridge closures during the replacement and rehabilitation of the bridge components. Additionally, the adjacent intersection’s signal timing will be modified to better synchronize with the bridge openings. The H&H designed Savannah Road Bridge was originally constructed in 1983.
H&H provided resident engineering services to the projects.