In the 1930 renumbering of state highways in New York, the NY 30 designation was reassigned elsewhere, leaving just US 4 on the portion of highway that US 4 now shares with NY 149. At the same time, all of NY 24 south of Middle Granville became part of NY 22 while NY 149 was assigned to the portion of its modern alignment between NY 9L in Queensbury and NY 22 south of the village of Granville. In July 1935, several floods devastated many highways in the state of New York. One highway affected was NY 149, as a bridge carrying the highway in the hamlet of South Granville was washed out. With the bridge out, drivers were detoured onto a town highway (now maintained by Washington County as CR 27) to access NY 22 and Granville from South Granville and to access NY 40 from Granville. NY 22 was also affected by the flood as a bridge in the town of Cambridge was washed out as well.