Macombs Dam
Coordinates: 40°49′41″N 73°56′02″W / 40.828087°N 73.933847°W
Macombs Dam (/məˈkuːmz/ mə-KOOMZ) was a dam and bridge across the Harlem River between Manhattan and the Bronx in New York City, which existed from c. 1814 to c. 1858.
In 1813, Robert Macomb, son of the merchant Alexander Macomb, requested permission of the New York State Legislature to build a dam which would hold water for a tide powered gristmill created by the new dam and another one Macomb owned near King’s Bridge on Spuyten Duyvil Creek. Fifty prominent citizens of the area, realizing that Macomb would most likely receive the permission he had asked for, petitioned the city's Common Council to allow a bridge to be built as part of the structure as well. This request was granted, and Macomb was allowed to collect tolls on the bridge, half of which would go to the Council to be used to educate the poor. The bridge was completed in 1816, two years after the dam had opened.
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