 The alignments of NY 12E and NY 12F east of what is now NY 180 were swapped , placing both routes on their current alignments.On August 1, 1979, maintenance of NY 12E between Bridge Street in Brownville and the Watertown city line was transferred from the state of New York to Jefferson County as part of a larger highway maintenance swap between the two levels of government.In return, the state assumed maintenance of Bridge Street in Brownville and the town of Hounsfield, among other highways.