Louis-Hippolyte Lafontaine Bridge-Tunnel

Louis-Hippolyte Lafontaine Bridge–Tunnel (bridge part)

Carries

Crosses

Further information
Characteristics
Total length	409 m (1,341.9 ft)
Width	37 m (121.4 ft)
Height	{?}
Clearance above	4.4 m (14 ft 5 ¹⁄₄ in)
Clearance below	8 m (26.2 ft) (?)
No. of lanes	6
History
Construction cost	C$75 million
Opened	March 11, 1967
Statistics
Daily traffic	120,000

Louis-Hippolyte Lafontaine Bridge–Tunnel (tunnel part)

Inside the tunnel. One of the three lanes is shown to be reversible.

Overview

Route

Autoroute 25

Crosses

Saint Lawrence River

Start

Montreal Island

End

Île Charron (Îles de Boucherville)

Further information
Operation
Character	Limited access highway
Technical
Length	1,391 m (4,563.6 ft)
No. of lanes	6
Tunnel clearance	4.4 m (14 ft 5 ¹⁄₄ in)
Width	37 m (121.4 ft)
Depth of tunnel below water level	To come
Depth of shipping channel above	To come

Louis-Hippolyte La Fontaine

Île Charron (Îles de Boucherville)

The Louis-Hippolyte Lafontaine Bridge–Tunnel (Pont-Tunnel Louis-Hippolyte-La Fontaine) is a Canadian highway bridge–tunnel running over and beneath the Saint Lawrence River. It connects the Island of Montreal with the south shore of the river at Longueuil, Quebec.

Construction began in 1963 and it opened on March 11, 1967. Named for the respected Lower Canada political reformer Louis-Hippolyte Lafontaine, the Lafontaine Tunnel is an immersed tube structure, measuring 1,391 m (4,563.6 ft) long. It carries the Autoroute 25 expressway and passes beneath the main shipping channel in the Saint. Lawrence River immediately downstream from the Saint Lawrence Seaway. It surfaces on Île Charron (Îles de Boucherville at entrance/exit #1 of Autoroute 25), then continues by bridge to Longueuil.

Each section weighs 32,000 t (31,000 long tons; 35,000 short tons), is 110 metres (360 ft) long, 37 metres (121 ft) wide and rises to a height of 8 metres (26 ft). In total, the bridge–tunnel is 1.8 kilometres (1.1 mi) long. It is estimated that 44 million vehicles drive through it per year, or 120,000 per day. The tunnel was built with sections prefabricated in dry dock and then sunk in the river, 24 metres (79 ft) below the surface of the water. It is one of the largest prestressed concrete structures in the world.

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Wikipedia