All manner of concrete, steel, and stone rubble from dredging, demolition projects, and other construction is used as artificial reef materials. This material is generally available at very low cost or free from construction companies who are more than happy to get rid of it. Transportation costs determine where this material is used by the Reef Program.
The packet ship Manhattan sank with eight of her nine crew. In the same storm, the 200 ft schooner Powhattan was also lost nearby, with over 350 immigrants on board and no survivors. Neither wreck has been positively identified, although there are several candidates, including one old wooden hull buried up to the gunwales in the sand.