Mill Dam Bridge, Historical bridge in Centerport, New York.
Mill Dam Bridge crosses the tidal mudflat of Centerport Harbor on Long Island's North Shore, connecting harbor waters to Mill Pond through tidegates. The current structure features a prestressed concrete center span with modern gates that manage water flow.
Sylvanus Townsend constructed the first bridge here in 1774, following an earlier mill and dam built in 1674 at a southern location. The modern bridge completed in 2005 replaced a 1936 structure.
The adjacent Grist Mill Park contains a historic millstone donated by the Centerport-Greenlawn Historical Society, marking the area's role as a working production center. This monument shows how milling shaped the local community and way of life for generations.
The bridge is best explored on foot, offering views of the harbor and Mill Pond from various points. The adjacent park provides walking space and is easily accessible with good pathways for visitors of all ages.
Workers discovered a 3000-pound gear from an 1848 mill renovation during causeway repairs in February 2008. This massive piece of machinery reveals the scale of equipment that once powered the site's industrial operations.
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