Lowering of the no. 7 caisson underwater, 1965
![A barge near a city](https://www.communitystories.ca/v2/pont-tunnel-louis-hippolyte-lafontaine_bridge/wp-content/uploads/sites/130/2020/01/PrtScr-capture_23.jpg)
Quebec Transport Ministry Archives
The no. 7 caisson was the last to be connected underwater. It was joined to the north approach.
Quebec Transport Ministry Archives
The no. 7 caisson was the last to be connected underwater. It was joined to the north approach.