Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel. The door was lifted vertically upwards. The ventilation system pushed air into the tunnel from a halfway vertical shaft, purging the bore of exhaust gases that came from the locomotives.

Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel. Train passing through it.

Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel. Construction for the tunnel began in 1984 and was completed on November 9, 1988.

Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel. Visible are delegates from the annual conference of the CRHA.

Photograph depicts westbound freight entering the eastern portal of CPR Mount Macdonlad Tunnel.

Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel.

Photograph depicts a motor inspection vehicles passing through the eastern portal of CPR Mount Macdonald Tunnel.

Photograph depicts the eastern portal of CPR Mount Macdonald Tunnel. Train passing through it.