From the NY Times:
Replacing it will be hugely expensive, with a tentative price tag of $200 million. It will involve 4.7 miles of new decking and about 50,000 linear feet of railing. And though work could start by the end of the year, the Boardwalk will take years to rebuild; just how many is unclear.
What is certain, however, is that it will not be made of wood. Soon after the hurricane, Mayor Michael R. Bloomberg said that the storm had laid to rest the debate over wood versus concrete as the preferred material for boardwalks. He pointed to the few concrete sections that had come through in relatively good shape.
The Army Corps of Engineers, which pumped nearly 600,000 cubic yards of sand onto the beach this summer, will eventually build whatever storm protections are chosen, but that will not happen for years, given the Corps’ lengthy technical and economic reviews. The Corps plans to share draft alternatives for the Rockaways with the public early next year, said Chris Gardner, a spokesman for the agency.
In the meantime, parks officials and engineers reassured the residents that the Boardwalk would be rebuilt to withstand future monster storms.
Not only will it be raised along its entire length, but the decking will be securely fastened to concrete pilings. The old Boardwalk had simply rested on the pilings, making it vulnerable to the storm surge.