Part of a fleet, Sludge Vessel Coney Island was built in the late 1930s during an era of wastewater treatment modernization aimed at keeping sewage out of the City’s rivers and harbor and improving public health. Back then, the vessels carried sludge out into the ocean, but since the 1990s they’ve sailed to facilities that turn it into biosolids, which can be composted, added to agricultural soils, or further processed for other beneficial uses.

Decommissioned by NYC’s Environmental Protection Administration in 1972, the Coney Island was intentionally sunk off the coast of New Jersey, becoming a Scuba diving and fishing destination as part of the Shark River Reef!