A year after the 1777 fall of Forts Clinton and Montgomery (at the west end of today’s Bear Mountain Bridge) General Washington decided to relocate the primary defenses of the Hudson Highlands to West Point, opposite Constitution Island.
In 1778 Col. Thaddeus Kosciuszko undertook the fortification of the plateau at West Point, which included a chain to block the river. The furnaces in Sterling burned night and day for four months to produce a 750-link chain, each link two feet long and weighing 180 pounds. It was dubbed “George Washington’s watch-chain,” a jolly pun for its day.
After the war, the chain rusted in a massive pile on the west shore until 1829, when the Secretary of War contracted Gouverneur Kemble to buy most of it. So the West Point Foundry, not around for the forging of the chain, was there for its meltdown, and iron from the Revolution was recast into cannon balls for the Civil War.