Creek, which splits into Marsh and Spring Mills Creeks a short distance to the northeast. At the eastern edge of Whitesville, NY 248 turns northward onto Wildman Avenue, crossing over Spring Mills Creek and following Marsh Creek northeastward out of both Whitesville and Allegany County. Steuben County Across the county line in Steuben County, NY 248 passes through rural, forested areas as it proceeds northeast along the base of a valley surrounding Marsh Creek. Roughly into the town of West Union, the creek gives way to a large, marshy lake, which NY 248 straddles while proceeding northeastward, and later southeastward through the valley. The valley ends southeast of the hamlet of Barney Falls and from the county line, allowing the route to turn northward and enter Rexville, a small community based around the junction of NY 248 and County Route 117. Here, NY 248 joins Bennetts Creek, which the route follows for the rest of its existence. Outside of Rexville, the route heads north through another forested valley—this time surrounding Bennetts Creek—to the town of Greenwood and the hamlet of the same name, the largest location on the route between Whitesville and the village of Canisteo. NY 248 heads north–south through the community, serving as its main street, before intersecting NY 417 north of the hamlet. The route continues on, passing through sparsely populated areas of the towns of Greenwood and Canisteo as it proceeds along the base of a wider, less pronounced valley around Bennetts Creek. The surroundings change immediately upon crossing over Purdy Creek and into the village of Canisteo, where NY 248 becomes Greenwood Street and passes by the village's schools (Canisteo-Greenwood Elementary/Middle School and the Canisteo-Greenwood High School, both part of the Canisteo-Greenwood Central School District) and several densely populated village blocks. After eight blocks, the street and the route come to an end at Main Street (NY 36). History The portion of modern NY 248 east of Whitesville was originally designated as Route 4-b, an unsigned legislative route, by the New York State Legislature in 1912. On March 1, 1921, Route 4-b was renumbered to Route 46 and extended westward along what is now NY 248 and NY 19 to Wellsville. No part of legislative Route 46 was assigned a posted designation when the first set of posted routes in New York were assigned in 1924; however, the entire route received a number as part