Niskayuna in Schenectady County, New York — The American Northeast (Mid-Atlantic)
Rexford Aqueduct Ruins
When New York Governor DeWitt Clinton first proposed the Erie Canal, naysayers mocked it as "Clinton's Ditch" and "Clinton's Folly." By the time it opened in 1825, however, the waterway was heralded as one of the world's greatest engineering achievements.
Stretching 363 miles from Albany to Buffalo, the challenging topography forced workers to dig much of the original canal by hand. Locks were installed to maneuver elevation changes, while aqueducts kept the canal flowing across rivers and other waterways.
To avoid particularly steep and rocky terrain in this area, Lock 22 was built, with the canal crossing the river by aqueduct here in Rexford, and then again downstream along a second aqueduct at Crescent (about 15 miles east along the trail).
Built in 1825, the first aqueduct here was called the Upper Mohawk. It was replaced 20 years later by the Rexford Aqueduct, during the enlargement of the Erie Canal.
When New York State launched an even larger Barge Canal system, around 1916, much of the Rexford aqueduct was dismantled to "canalize" the Mohawk River. This allowed vessels big enough to compete with new railroads.
Remains of the aqueduct stone piers were eventually repurposed as the base of a highway bridge across the river. You can still see and stand onthe ruins visible to your lower right (accessible via Williams Street). Today, stone blocks from the original aqueduct run along the Empire Trail, near the Rivers Ledge complex (about .5 miles west).
New York State Canal Sytem National Historic Landmark 2016
Thank you to the Schenectady County Historical Society, the Clifton Park History Collection at the Clifton Park Halfmoon Library, the Historical Marker Database and the National Park Service Historic American Engineering Record.
(Photo Captions and Illustrations )
- Boat crossing over the Mohawk River through the Rexford Aqueduct.
- Rexford Aqueduct with the Rexford Store on the left.
- Where the Erie Canal Croesses the Mohawk River Near Schenectady, N.Y.
- Aerial View of the Rexford Aqueduct and the Vischer Ferry lock on the Erie Canal.
Erected 2025 by Schenectady County.
Topics. This historical marker is listed in these topic lists: Bridges & Viaducts • Waterways & Vessels. A significant historical year for this entry is 1845.
Location. 42° 50.883′ N, 73° 53.329′ W. Marker is in Niskayuna, New York, in Schenectady County. It is at the intersection of Empire State Trail and Balltown Road (New York State Route 146), on the right when traveling west on Empire State Trail. Marker is on the bridge over NY 146 and is only accessible from the bicycle trail. Touch for map. Marker is in this post office area: Schenectady NY 12309, United States of America. Touch for directions.
Regionally, this marker is in Upstate New York, in the Capital District, and in the Albany Metropolitan Area. It is also in the American Northeast and in the Mid-Atlantic. Globally, it is in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once New Netherland and also one of the original Thirteen Colonies.
Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies: The Historic Rexford Aqueduct (about 500 feet away, measured in a direct line); Aqueduct, 1842 (approx. Ό mile away); Rexford House (approx. half a mile away); Rexford Cemetery (approx. half a mile away); Alplaus (approx. Ύ mile away); Alplaus Kill Preserve (approx. one mile away); Southard House (approx. 1.1 miles away); Yates Farm (approx. 1.2 miles away).
Credits. This page was last revised on May 3, 2025. It was originally submitted on May 2, 2025, by Steve Stoessel of Niskayuna, New York. This page has been viewed 269 times since then and 38 times this year. Photos: 1, 2, 3, 4. submitted on May 2, 2025, by Steve Stoessel of Niskayuna, New York.



