42 bends northeast and crosses the county line into Greene County. Upon crossing into Greene County, NY 42 is in the town of Lexington. Residences become more sporadic as NY 42 continues northward through Lexington, crossing under the power lines before bending northward through the dense woods of Halcott Mountain and Deep Notch, soon bending northeast into a large field area, where it enters the hamlet of West Kill. In West Kill, NY 42 intersects with the western terminus of CR 6 (Spruceton Road). NY 42 through West Kill consists of several residences along both sides of the highway before crossing over the namesake kill and bending northwest out of the hamlet. While running east of West Kill, NY 42 remains a two-lane residential roadway, crossing over the waterway once again and intersecting with Beechridge Road North. At Beechridge Road North, NY 42 bends northeast along runs west of the West Kill before bending southeast into the hamlet of Lexington. In Lexington, NY 42 is a two-lane residential street that soon runs along Schoharie Creek through downtown. The two-lane street continues southeast until an intersection with Rappleyea Road, where NY 42 crosses the creek and intersects with the terminus of CR 13A. After CR 13A, NY 42 bends southeast then northeast through downtown Lexington and intersects with NY 23A. This junction serves as the northern terminus of the northern segment of NY 42, while the right-of-way continues north as CR 13 through the Catskill Park. History When NY 42 was originally assigned as part of the 1930 renumbering of state highways in New York, it was a continuous route extending along a previously unnumbered roadway from Port Jervis in the south to Lexington in the north via Monticello, Neversink, and Shandaken. The section of NY 42 between Neversink and Shandaken was eliminated due to its low traffic volume and maintenance difficulties arising from the road's high elevation and exposure to severe winter weather. Even today the portion in Ulster County is visibly affected by these conditions. Flooding In 2014, the town of Lexington's Flood Commission hired Milone & MacBroom, a New Paltz engineering firm, to evaluate various options related to West Kill's stream course between the hamlets of West Kill and Lexington. Two years later, after having run computer simulations of flood events at all frequency levels up to 500-year, the firm concluded that the only option which provided benefit