Champlain Canal Lock 6

Lock 6

Champlain Canal Lock C6.
Phone Number: (518) 695-3751
Lift: 16.5 feet
GPS Coordinates: N 43° 09' 41"
W 73° 34' 47"
How to Lock Through

Lock C6 is located in the town of Fort Miller and is the northern most lock on the Hudson River. The lock has a lift of 16.5 feet, lifting boats from 102.5 feet above sea level to 119 feet above sea level. Lock 6 is located north of Lock C5 by 4 miles and south of Lock C7 by 7 miles.

The lock master can be reached at (518) 695-3751 or on VHF channel 13.


Lock 6 was one of the first canal locks built on the modern canal system. It was part of the third contract given, Contract Number 3. Constructing the Crocker's Reef Guard Gate to the north was also part of this contract.

The excavation of the artificial canal was mostly done by steam shovels starting in April, 1905, and was completed within about two years. The excavation for guard-gate approach wall and Lock 6 foundation was done during the the winter of 1906 followed by construction. During 1907 the south approach walls, lock chamber floor, gate and miter-sills and about one-third of the lock walls were completed.

The concrete for the lock and approach walls was mixed by a plant located on the east side of the present lock. Materials are delivered in canal boats — the stone from Northumberland, the sand from a bank near Sandy Hill. The boats used have a hopper shaped hold, under which is a rubber belt conveyor operated by an electric motor. From the conveyor in the boat a marine leg receives the materials and lifts them to the storage bins in the top of the mixing plant. From those bins the materials are delivered to the measuring hoppers by gravity and by rubber belt conveyors, and the cement is carried by rubber belt conveyor from the cement house to the measuring hoppers. The concrete is delivered in buckets on cars from the mixers to the derricks which place it in position. A feature of the concrete construction in the lock is the timber bracing crib, which is so constructed as to carry a 30-foot section of the face forms for the two opposite sections of the lock walls the full height of same without taking the forms apart. This crib is mounted on trucks, which run on tracks on the concrete floor of lock. When one section of the wall is completed, the trench braces attached to the forms and held in place by the crib are loosened, and the form moved to an adjoining section, which can be lined up and ready to fill again in 24 hours.

View of new and old channel near Lock 6 (1907).
View of new and old channel near Lock 6 (1907).  
Construction of the chamber of the lock.  The floor done, sidewalls started (1907).
Construction of the chamber of the lock. The floor done, sidewalls started (1907).  
A view from the south of the lock during construction (1907).
A view from the south of the lock during construction (1907).  
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