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| Lock, &c at the isthmus, the last ascent to the Summit Water of the Canal from Lake Ontario; 1841 Thomas Burrowes, watercolour (Archives of Ontario - from Passfield, 1982) |
| View of the lock at the Isthmus looking out into Mud Lake. The blockhouse is visible on the left. The two posts located on either side of the lock at the near end are attached by ropes to a flood safety gate. This gate was designed to automatically pivot upwards in the event of a flood or the failure of the lock gates (which would have drained Upper Rideau Lake into Newboro Lake). It lay flat on the floor of the channel and could also be manually raised into place using the posts and ropes. |
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