Mill Rock, Island in East River, Manhattan, US
Mill Rock is a rocky island in the East River between Manhattan and Queens where the Harlem River meets it. The landmass features natural stone formations and irregular shorelines creating habitat for nesting seabirds.
The island was developed with a mill in 1701 that gave it its name. In 1885, Army engineers detonated massive amounts of explosives to make the waterways safer for ship traffic.
The island now functions as a nesting ground where wading birds gather and raise their young each year. People observe these colonies from nearby shores, especially during breeding season.
The island has been closed to the public since the 1960s and cannot be visited by landing on it. The best views come from nearby shorelines or bridges, particularly from the RFK Bridge.
In 1885, roughly 300,000 pounds of explosives were detonated to blast away rocks and improve shipping routes. This was one of the largest blasting projects of its era in New York Harbor.
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