The Fire Island Inlet Bridge, an integral part of the Robert Moses Causeway, is a two-lane, steel tied arch span with a concrete deck that carries the parkway over Fire Island Inlet. Construction of the Fire Island Bridge was completed in 1964 and although a relatively young structure,, its concrete deck has suffered from severe chloride ingress resulting …The Fire Island Inlet Bridge, an integral part of the Robert Moses Causeway, is a two-lane, steel tied arch span with a concrete deck that carries the parkway over Fire Island Inlet. Construction of the Fire Island Bridge was completed in 1964 and although a relatively young structure,, its concrete deck has suffered from severe chloride ingress resulting in cracks, spalling, and the formation of potholes.