Ontario's Historical Plaques 

Discover Ontario's history as told through its plaques

2004 - Now in our 15th Year - 2019

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The Peterborough Lift Lock

Peterborough Lift Lock

Photo by Alan L Brown - Posted June, 2009

Peterborough Lift Lock

Photo by Alan L Brown - Posted June, 2009

Peterborough Lift Lock

Photo by contributor William Stewart - July, 2008

Plaque Location

The County of Peterborough
The City of Peterborough
At the east end of Hunter Street East at the lift lock
behind the visitor centre

Coordinates: N 44 18.448 W 78 18.058


Click here for a larger map

Plaque Text

Opened in 1904, with a lift of 19.8 meters, this is the highest hydraulic lift lock in the world and the first of two built in North America, both on the Trent-Severn Waterway. It operates on a balance principle. A constant water pressure supports each ram through connecting pipes below ground. When extra water is let into the upper chamber, a connecting valve is opened and the heavier chamber automatically descends forcing up the lower chamber to start a new cycle. Among innovations on this lift were the use of concrete, air-filled seals, drop gates, and cast-steel presses for the rams.

Related Ontario plaques
The Trent Canal
The Scugog Route
Canal Lake Arch Bridge



Peterborough Plaques

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