A single lock provides 7.6 feet (2.3 m) of lift. This lock also features an Unequal Arm, Center Bearing timber swing bridge (aka, somewhat incorrectly, a Kingpost Truss Swing Bridge). The swing bridge is so well balanced that it can be rotated by a single person pushing on it.
To the west, across the river, is the former community of Andrewsville. To the southeast is McGuigan Cemetery, one of the oldest burial grounds on the Rideau Canal.
For a full history of the Nicholsons Locks see: History of the Nicholsons Locks
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