turnpike was no longer maintained by a private company after 1899 and the highway remained intact for over 75 years. In 1974, part of the turnpike was added to the National Register of Historic Places. From Cairo to Stamford, the Susquehanna took a more northerly alignment, while NY 23 follows the turnpike of the Schoharie Kill Bridge Company, chartered in 1801. West of West Harpersville, the road superseded the Charlotte Turnpike to Oneonta, and part of the Butternuts and Sherburne Turnpike to Morris, which was in operation from 1836 to 1877. In 1908, the New York State Legislature created Route 5, an unsigned legislative route that extended from Kingston in the south to Mohawk in the north. From Oneonta to Grand Gorge, Route 5 utilized modern NY 23. The portion of what is now NY 23 from Grand Gorge to Prattsville was designated as part of Route 38 in 1909 while the segment between the Delaware–Greene County line and Catskill (via modern CR 23B) became Route 5-a in 1911. On March 1, 1921, Route 38 was realigned to enter Grand Gorge from the northeast on modern NY 30 while Route 5-a was renumbered to Route 47 and extended northwest to Grand Gorge over the former routing of Route 38. When the first set of posted routes in New York were assigned in 1924, the Oneonta–Grand Gorge segment of legislative Route 5 and all of Route 47 became part of NY 23, which continued east from Catskill to the Massachusetts state line southwest of Great Barrington, Massachusetts. It initially overlapped with NY 10 (later US 9W) northward along modern NY 385 to Athens, where it crossed the Hudson River via a ferry to Hudson. It continued east from Hudson on what is now NY 23B to Claverack, where it joined its modern alignment to Massachusetts. NY 23 was extended westward to NY 12 in Norwich in the mid-1920s. In the 1930 renumbering of state highways in New York, NY 23 was extended west along a previously unnumbered roadway to NY 26 in northwest Chenango County. From Norwich to North Pharsalia, NY 23 followed its modern alignment; between North Pharsalia and NY 26, NY 23 was routed on modern CR 42. Realignments On July 2, 1935, the Rip Van Winkle Bridge over the Hudson River between Catskill and Greenport was opened to traffic. It became part of a realigned NY 23 after