Lowering of the no. 7 caisson underwater, 1965
Quebec Transport Ministry Archives
The no. 7 caisson was the last to be connected underwater. It was joined to the north approach.
The Louis-Hippolyte Lafontaine Bridge–Tunnel The Louis-Hippolyte Lafontaine Bridge–Tunnel: A Feat of Engineering Between Two Shores Atelier d'histoire Mercier-Hochelaga-Maisonneuve