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What is that?
Guide to Common Canal Structures
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Lock 0 Power House 0 Gate Cabinet
Lock   Power House   Gate Cabinet
Lift Bridge 0 Dam 0 Guard Gate
Lift Bridge   Movable Dam   Guard Gate
Historic Lock 0 Aqueduct 0 Restored Aqueduct, Camillus
Historic Lock   Aqueduct   Restored Aqueduct
Dry Dock, Chittenango 0 Bowstring Bridge 0 Lock Operator
Dry Dock   Bowstring Truss Bridge   Lock Operator
0 0
Lock 0
Erie Lock 4, Waterford, photo by Jon Crispin 0
Erie Lock 4, Waterford

Locks are elevators for boats, lifting and lowering them as they travel along the waterway. It takes about 15 minutes to "lock through." There are 57 locks on New York's canal system, including 35 on the Erie Canal, 11 on the Champlain Canal, seven on the Oswego Canal, and four on the Cayuga-Seneca Canal.