NY 411 remained unchanged until August 1, 1979, when ownership and maintenance of several highways in Jefferson County was transferred from Jefferson County to the state of New York and vice versa. As part of the swap, maintenance of NY 283's alignment west of Theresa and from Theresa to Antwerp was given to Jefferson County from the state in exchange for Lafargeville Road southwest of Theresa, among other highways. Following the swap, NY 26 was reextended north to Alexandria Bay; however, since its former alignment east of Theresa was now a county road, it was routed on the portion of NY 411 from Philadelphia to Theresa instead. As a result, NY 411 was truncated to the southern terminus of its overlap with NY 37 southwest of Theresa.