The Peterborough Lift Lock is a boat lift located on the Trent Canal in the city of Peterborough, Ontario, Canada, and is Lock 21 on the Trent-Severn Waterway.
The dual lifts are the highest hydraulic boat lifts in the world, with a lift of 19.8 m (65 ft). This was a considerable accomplishment at the time when conventional locks usually only had a 2 m (7 ft) rise. It is not the highest boat lift of any type in the world today: the lift at Strépy-Thieu in Belgium has a greater capacity (1,350 tonnes) and height difference (73.15 m).
In the 1980s, a visitors' centre was built beside the lock. It offers interactive simulations of going over the lift lock in a boat, and also historical exhibits detailing the construction of the lift lock.
Many local residents of Peterborough skate on the canal below the lift lock in the winter.
The Peterborough Lift Lock was designated a National Historic Site of Canada in 1979, and was named an Historic Mechanical Engineering Landmark by the American Society of Mechanical Engineers in 1987.
The Trent-Severn has a similar hydraulic lift lock, the Kirkfield Lift Lock, at its summit near Kirkfield, with basins of the same dimensions, but which has a smaller vertical lift.(Wikipedia)