New York State Barge Canal, a man-made waterway extending across the state of New York. It extends from Buffalo on Lake Erie eastward to the Hudson River near Albany. Branches of the canal connect it with Lakes Ontario and Champlain on the north, and Seneca and Cayuga lakes on the south. The total length of the canal system is 525 miles (845 km). The main route, excluding branch canals, is 340 miles (547 km) and follows the general route of the old Erie Canal, built in 1817-25. The present canal and its branches follow river and lake routes in part: the route passes through part of the Niagara River; Oneida Lake; the Oswego, Seneca, and Mohawk rivers; and the northern part of the Hudson River.

The channel is 12 feet (3.7 m) deep, and varies in bottom width from 75 to 200 feet (23 to 60 m). There are almost 60 locks to raise and lower vessels. The canal is supported by state taxes, and is toll-free. The present canal system was begun in 1905 and completed in 1918.