Lock 21 - Peterborough Lift Lock

It is an extensive solid structure along the Trent-Severn Waterway intended to lift pontoons 19.8 meters. The bolt works on an adjust framework, whereby water is let into the upper chamber, an interfacing valve is opened and the heavier chamber naturally slides, compelling up the lower chamber to begin another cycle.

The lift bolt keeps on working as a component of the Trent– Severn Waterway National Historic Site of Canada under the administration of Parks Canada. Official acknowledgment alludes to the lift bolt, including the quick upper and lower channel cuts, dikes and underground works related with the capacity of the bolt at the season of assignment.