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Canadian Coast Guard

<% else %> <% end if %> USQUE AD MARE
A History of the Canadian Coast Guard and Marine Services
by Thomas E. Appleton

The Canals of Canada
Dates of Opening and of Deepening

Canals in Nova Scotia

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
St. Peters	1869	13	122
	1880	18	200
	1918	18	300	Admits 17 ft. draft 1967
Canso	1955			Admits 10 ft. draft
	1957	28	820	Admits 28 ft. draft

Canals in the St. Lawrence River

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Ship Channel	1844			Dredged 10 ft. minimum
	1854			Dredged 16 ft. minimum
	1860			Dredged 17.25 ft. minimum
	1865			Dredged 20 ft. minimum
	1882			Dredged 25 ft. minimum
	1888			Dredged 27.5 ft. minimum
	1907			Dredged 30 ft. minimum
	1952			Dredged 35 ft. minimum

St. Lawrence Canals

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Casson Canal	1733	2.5	20	Canoe lock
Lachine	1824	5	100
	1848	9	200
	1882	14	270	Navigable depth 12 ft.
	1898	14	270	Navigable depth 14 ft.
	1959			Closed for through traffic
Cascades	1783	2.5	20
	1817	3.5	20
	1845			Closed
Split Rock	1783	2.5	20	Canoe lock
	1817	3.5	20	Canoe lock
	1845			Closed
Côteau du Lac	1783	2.5	20	Canoe lock
	1817	3.5	20	Canoe lock
	1845			Closed
Beauharnois	1845	9	200	Replaced Cascades, Split Rock, and Côteau du Lac
Soulanges	1900	15	280	Replaced Beauharnois
	1959			Closed
Cornwall	1843	9	200
	1895	14	270
	1967			Navigable depth 14 ft.
Farran's Point	1847	9	200
	1899	16	800
Rapide Plat	1847	9	200
	1896	14	270
Galops	1846	9	200
	1856	9	200	Include former Galops, Iroquois and Junction
	1897	14	200
	1898	14	270
	1959			Farran's Point, Rapide Plat and Galops canals inundated by St. Lawrence Seaway

Welland System Canals

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Welland	1829	8	110
	1833	7.5	110	Completed to Port Colbourne.
	1848	9	150	Feeder to Dunneville and Maitland completed.
	1855	10
	1883	12	270
	1887	14	270
Welland Ship Canal	1930	30	859	Navigable depth 18 ft.
	1932			Navigable depth 22 ft.
	1933			Navigable depth 23.5 ft.
	1935			Navigable depth 25 ft.
	1959			Navigable depth 27 ft. From 1959 under jurisdiction of St. Lawrence Seaway

Canals in Saul Ste. Marie

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Sault	1798	1.5	38	Built by Northwest Fur Company. Partially destroyed by U.S. troops in 1814
	1895	18.25	900
	1959			Under jurisdiction of St. Lawrence Seaway Authority

Ottawa River System Canals

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Ste. Anne	1843	6	190
	1882	9	200
	1967			Navigable depth 9 ft.
Chute A Blondeau	1834	6
	1867	6	130.5
	1882			Became unnecessary when Carillon dam built
Grenville	1834	6
	1867	6	106.5
	1879	6	128
	1882	9	200
	1963			Replaced by Carillon
Carillon	1834	6	126.25
	1882	9	200
	1963	9	188	Replaced the old Carillon and Grenville Canals
Rideau	1832	6	134
	1967			Navigable depth 5.5 ft.
Tay	1834	4	101	Branch of Rideau Canal
	1889	5	134
	1967			Navigable depth 5.5 ft.

Richelieu System Canals

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
St. Ours	1849		200
	1867	7	200
	1932	12	339
	1967			Navigable depth 12 ft.
Chambly	1843	7	120.5
	1967			Navigable depth 6.5 ft.

Trent Murray System Canals

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
Murray	1890	12.5		No locks
Trent	1833			Built in stages. Draft varies, at present 8 ft. from Lake Ontario to Peterborough 6 ft. from Peterborough to Big Chute, and Big Chute to Georgian Bay. Big Chute has 4 ft.

St. Lawrence Seaway

Canal	Date	Depth Over Lock (Ft.)	Length of Lock (Ft.)	Remarks
St. Lawrence Seaway	1959	27	766	Operated by St. Lawrence Seaway Authority

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