Old roads The alignment used by modern NY 343 was a major transportation route that passed through the colonial settlements of Wassaic and Amenia. The highway helped General
George Washington's troops during the
American Revolutionary War and was also the main supply route to the hamlets of Payne's Corners (now Amenia), Washiac (now Wassaic) and Dover Plains. Stone statues that marked the way to different places including
New York City,
Fishkill and
Boston were put up along the road during the Revolution, helping suppliers of
salt from Boston. There were also a few factories along the route, including a
Borden Food Corporation factory that produced
condensed milk in the 1860s. NY 343 from the NY 22 / US 44 intersection in Amenia to the
Connecticut state line was part of the main line of the
Dutchess Turnpike, which ran from
Poughkeepsie to the state line at Amenia, mostly along modern US 44. Prior to the building of the turnpike, the section of modern NY 343 east of Amenia to the state line was a swamp and did not connect Amenia to the state line. The turnpike corporation was established by law in April 1802 and finished grading the highway in 1805. In May 1803, the continuation of the Dutchess Turnpike into Connecticut, the
Goshen and Sharon Turnpike, was also chartered. When the road was completed a few years later, it established a continuous, improved road between Poughkeepsie and
Hartford. In 1806, a branch route, splitting off from the mainline at South Millbrook, was established to connect the hamlet of Dover Plains to Poughkeepsie. The southern branch used modern NY 343 from its western end at US 44 in South Millbrook to NY 22 in Dover Plains. The state took over maintenance of the turnpikes at the beginning of the 20th century.
Designation In 1924, the main line of the Dutchess Turnpike was designated as
NY 21, connecting the city of
Poughkeepsie to the Connecticut state line as the original turnpike did. The road continued into Connecticut as
Route 4, a highway that was part of the
New England road marking system. In the
1930 state highway renumbering, old NY 21 was broken up into several state routes. The portion between
NY 82A west of the
hamlet of Amenia and the Connecticut state line in the town of
Sharon was renumbered as NY 343. In 1932, the continuation of NY 343 in Connecticut was renumbered from Route 4 to Route 343 to match the New York route number. As part of the 1930 renumbering, the Dover branch of the Dutchess Turnpike between modern
NY 82 in the village of
Millbrook and
NY 22 north of the hamlet of
Dover Plains was designated as part of NY 200, which began in the city of Poughkeepsie and went via Millbrook to the vicinity of Dover Plains.
US 44 was assigned in April 1935, resulting in the reconfiguration of several state routes in
Dutchess County. One of the routes affected was NY 200, which was truncated. The section of NY 200 west of Amenia became part of the new US 44 The NY 200 designation was removed from the Amenia–Sharon road in the early 1940s and NY 343 was redesignated along that section. The two segments of NY 343 were connected via an overlap with NY 22, which remains to this day. ==Major intersections==