The Chambly Canal is a National Historic Site of Canada in the Province of Quebec,^[1] running along the Richelieu River past Saint-Jean-sur-Richelieu, Carignan, and Chambly. Building commenced in 1831 and the canal opened in 1843.^[2] It served as a major commercial route during a time of heightened trade between the United States and Canada. Trade dwindled after World War I, and as of the 1970s, traffic has been replaced by recreational vessels.

Chambly Canal
Chambly Canal and multipurpose path, Saint-Jean-sur-Richelieu
Specifications
Locks	9
Navigation authority	Parks Canada
History
Construction began	September 5, 1831
Date of first use	June 9, 1843
Date completed	1843
Geography
Start point	Chambly
End point	Saint-Jean-sur-Richelieu
National Historic Site of Canada
Official name	Chambly Canal National Historic Site of Canada
Designated	1929

It is part of a waterway that connects the Saint Lawrence River with the Hudson River in the United States. Lake Champlain and the Champlain Canal form the U.S. portion of the Lakes to Locks Passage.

The Canal has 10 bridges—8 of which are hand operated—and nine hydraulic locks.

• Draft: 6.5 ft (1.98 m)
• Clearance: 29 ft (8.84 m)
• Canal Length: 20 km (12 mi)^[3]
• Dimensions of smallest lock: 110 ft × 21 ft (33.53 m × 6.40 m)
• Passage time: 3 to 5 hours