The Watervliet Turnpike Company in 1828 built present-day New York State Route 32 from the northern boundary of Albany north to the northern limit of Gibbonsville (now Broadway and 15th Street).
Recognized as an expert on developing and producing artillery and other weapons, Flagler continued his Ordnance service after the war, including assignments at the Watervliet, Augusta, Rock Island, Fort Monroe, Fort Union, San Antonio, Frankford, and Watertown arsenals.
In August of 1961, Larry Kickels collected the third right upper molar of a Jefferson mammoth from a gravel layer 100 feet below the surface of Berrien County, near the town of Watervliet.
That part of the town of Watervliet is now in the town of Colonie (since 1895), and the name Watervliet is now limited to the city of Watervliet (1896).
In 1928, the assets of the company were purchased by the Cincinnati Car Company and the company's base was moved from Watervliet to Cincinnati, Ohio.