vteSt. Lawrence River
Lake Ontario Wolfe Island Carleton Island Howe Island Grindstone Island Calumet Island Sugar Island Murray Isle Wellesley Island Ash Island Hill Island Thousand Islands Bridge Lake of the Isles Longue Vue Island Just Room Enough Island Heart Island Club Island Deer Island Zavikon Island Grenadier Island Tar Island Ironsides Island Oak Island Dark Island Oswegatchie River Ogdensburg–Prescott International Bridge Iroquois Lock Iroquois Dam Wiley-Dondero Canal Barnhart Island Long Sault Dam Eisenhower Lock Tunnel Eisenhower Lock Barnhart Island Bridge Moses-Saunders Power Dam Snell Lock Grasse River Galop Island Cornwall Island Seaway International Bridge Raquette River USCA St. Regis River Raisin River ONQC Lake Saint Francis Beauharnois Canal Grande-Île Saint Charles River Île-de-Salaberry Coteau Railway Bridge Monseigneur Langlois Bridge Larocque Bridge Île aux Vaches Barrage Juillet Saint-Louis-de-Gonzague Bridge Barrage Saint-Timothy Baie Bayard Centrale des Cèdres Serge-Marcil Bridge Barrage de la Pointe-du-Buisson Barrage de Pointe-des-Cascades Madeleine-Parent Bridge Pied-du-Canal Bridge Beauharnois Lock (upper) Beauharnois Generating Station Boulevard Edgar Hébert Bridge Beauharnois Lock (lower) Ottawa River Lake Saint-Louis Châteauguay River St. Lawrence Seaway Lachine Canal Saint-Laurent Railway Bridge Honoré Mercier Bridge Lachine Rapids Heron Island Côte Sainte Catherine Lock Champlain Bridge Ice Structure Champlain Bridge (under demolition) Samuel De Champlain Bridge Saint–Lambert Lock Victoria Bridge Notre Dame Island Saint Helen's Island Pont de la Concorde Lachine Canal Pont du Cosmos Montreal Metro Yellow Line Jacques Cartier Bridge Minirail Charron Island Louis-Hippolyte Lafontaine Bridge–Tunnel Sainte-Thérèse Island Rivière des Prairies Île Bouchard Sorel-TracyBerthierville Ferry Richelieu River Île de Grâce Maskinongé River Yamaska River Saint-François River Lake Saint Pierre Nicolet River Laviolette Bridge Saint-Maurice River Champlain River Batiscan River Sainte-Anne River Rivière du Moulin Portneuf River Jacques-Cartier River Rivière des Roches Charland River Rivière du Cap Rouge Pierre Laporte Bridge Quebec Bridge LévisQuebec City Ferry Saint-Charles River Île d'Orléans Île d'Orléans Bridge Boyer River Rivière des Mères Sainte-Anne-du-Nord River Isle-aux-Grues Île aux Coudres Malbaie River Rivière-du-LoupSaint-Siméon Ferry Île aux Lièvres Verte Island L'Isle-VerteNotre-Dame-des-Sept-Douleurs Ferry Saguenay River Trois PistolesLes Escoumins Ferry Île du Bic Rimouski River RimouskiForestville Ferry Rivière aux Outardes Tartigou River Manicouagan River MataneBaie-Comeau Ferry MataneGodbout Ferry MataneSept-Îles Ferry Matane River St. Lawrence Estuary Gulf of St. Lawrence Atlantic Ocean
Lake Ontario
Wolfe Island
Carleton Island
Howe Island
Grindstone Island
Calumet Island
Sugar Island
Murray Isle
Wellesley Island
Ash Island
Hill Island
Thousand Islands Bridge
Lake of the Isles
Longue Vue Island
Just Room Enough Island
Heart Island
Club Island
Deer Island
Zavikon Island
Grenadier Island
Tar Island
Ironsides Island
Oak Island
Dark Island
Oswegatchie River
Ogdensburg–Prescott International Bridge
Iroquois Lock
Iroquois Dam
Wiley-Dondero Canal
Barnhart Island
Long Sault Dam
Eisenhower Lock Tunnel
Eisenhower Lock
Barnhart Island Bridge
Moses-Saunders Power Dam
Snell Lock
Grasse River
Galop Island
Cornwall Island
Seaway International Bridge
Raquette River
USCA
US
CA
St. Regis River
Raisin River
ONQC
ON
QC
Lake Saint Francis
Beauharnois Canal
Grande-Île
Saint Charles River
Île-de-Salaberry
Coteau Railway Bridge
Monseigneur Langlois Bridge
Larocque Bridge
Île aux Vaches
Barrage Juillet
Saint-Louis-de-Gonzague Bridge
Barrage Saint-Timothy
Baie Bayard
Centrale des Cèdres
Serge-Marcil Bridge
Barrage de la Pointe-du-Buisson
Barrage de Pointe-des-Cascades
Madeleine-Parent Bridge
Pied-du-Canal Bridge
Beauharnois Lock (upper)
Beauharnois Generating Station
Boulevard Edgar Hébert Bridge
Beauharnois Lock (lower)
Ottawa River
Lake Saint-Louis
Châteauguay River
St. Lawrence Seaway
Lachine Canal
Saint-Laurent Railway Bridge
Honoré Mercier Bridge
Lachine Rapids
Heron Island
Côte Sainte Catherine Lock
Champlain Bridge Ice Structure
Champlain Bridge (under demolition)
Samuel De Champlain Bridge
Saint–Lambert Lock
Victoria Bridge
Notre Dame Island
Saint Helen's Island
Pont de la Concorde
Lachine Canal
Pont du Cosmos
Montreal Metro Yellow Line
Jacques Cartier Bridge
Minirail
Charron Island
Louis-Hippolyte Lafontaine Bridge–Tunnel
Sainte-Thérèse Island
Rivière des Prairies
Île Bouchard
Sorel-TracyBerthierville Ferry
Richelieu River
Île de Grâce
Maskinongé River
Yamaska River
Saint-François River
Lake Saint Pierre
Nicolet River
Laviolette Bridge
Saint-Maurice River
Champlain River
Batiscan River
Sainte-Anne River
Rivière du Moulin
Portneuf River
Jacques-Cartier River
Rivière des Roches
Charland River
Rivière du Cap Rouge
Pierre Laporte Bridge
Quebec Bridge
LévisQuebec City Ferry
Saint-Charles River
Île d'Orléans
Île d'Orléans Bridge
Boyer River
Rivière des Mères
Sainte-Anne-du-Nord River
Isle-aux-Grues
Île aux Coudres
Malbaie River
Rivière-du-LoupSaint-Siméon Ferry
Île aux Lièvres
Verte Island
L'Isle-VerteNotre-Dame-des-Sept-Douleurs Ferry
L'Isle-Verte
Notre-Dame-des-Sept-Douleurs Ferry
Saguenay River
Trois PistolesLes Escoumins Ferry
Île du Bic
Rimouski River
RimouskiForestville Ferry
Rivière aux Outardes
Tartigou River
Manicouagan River
MataneBaie-Comeau Ferry
MataneGodbout Ferry
MataneSept-Îles Ferry
Matane River
St. Lawrence Estuary
Gulf of St. Lawrence
Atlantic Ocean

The St. Lawrence River (French: Fleuve Saint-Laurent, pronounced [flœvsɛ̃lɔʁɑ̃]) is a large international river in the middle latitudes of North America connecting the Great Lakes with the North Atlantic Ocean. Its waters flow in a northeasterly direction from Lake Ontario to the Gulf of St. Lawrence, traversing Ontario and Quebec in Canada and New York in the United States. A portion of the river demarcates the Canada–United States border.

As the primary drainage outflow of the Great Lakes Basin, the St. Lawrence has the second-highest discharge of any river in North America (after the Mississippi River) and the 16th-highest in the world. The estuary of the St. Lawrence is often cited by scientists as the largest in the world. Significant natural landmarks of the river and estuary include the 1,864 river islands of the Thousand Islands, the endangered whales of Saguenay–St. Lawrence Marine Park, and the limestone monoliths of the Mingan Archipelago.

Long a transportation route to Indigenous peoples, the St. Lawrence River has played a key role in the history of Canada and in the development of cities such as Montreal and Quebec City. The river remains an important shipping route as the backbone of the St. Lawrence Seaway, a lock and canal system that enables world marine traffic to access the inland ports of the Great Lakes Waterway.

Etymology

The river has historically been given a variety of different names by local First Nations. Beginning in the 16th century, French explorers visited what is now Canada and gave the river names such as the Grand fleuve de Hochelaga and the Grande rivière du Canada, where fleuve and rivière are two French words (fleuve being a river that flows into the sea).

The river's present name has been used since 1604 when it was recorded on a map by Samuel de Champlain. Champlain opted for the names Grande riviere de sainct Laurens and Fleuve sainct Laurens in his writings, supplanting the earlier names. In contemporary French, the name is rendered as the fleuve Saint-Laurent. The name Saint-Laurent (Saint Lawrence) was originally applied to the eponymous bay by Jacques Cartier upon his arrival into the region on the 10th of August feast day for Saint Lawrence in 1535.

Indigenous people use the following names:

  • Innu-aimun, the language of Nitassinan, refer to it as Wepistukujaw Sipo/Wepìstùkwiyaht sīpu.
  • the Abenaki call it Moliantegok/Moliantekw ("Montréal River"), Kchitegw/Ktsitekw/Gicitegw ("Great River"), or Oss8genaizibo/Ws8genaisibo/Wsogenaisibo ("River of the Algonquins").
  • in Mohawk language it is Roiatatokenti, Raoteniateara, Ken’tarókwen, or Kaniatarowanénhne.
  • Tuscarora people call it Kahnawáˀkye or Kaniatarowanenneh ("Big Water Current").
  • Algonquin people call it "the Walking Path" or Magtogoek, or Kitcikanii sipi, the "Large Water River".
  • the Wendat Nation call it Lada8anna or Laooendaooena'.
  • the Atikamekw of Nitaskinan refer to it as Micta sipi ("Huge River").

Geography

Boats of the Transat Québec–Saint-Malo on the St. Lawrence River in 2000
Cross commemorating the one laid by Jacques-Cartier on October 7, 1535, Trois-Rivières
The Champlain Sea

Marine weather

In winter, the St. Lawrence River begins producing ice in December between Montreal and Quebec City. The prevailing winds and currents push this ice towards the estuary, and it reaches the east of Les Méchins at the end of December. Ice covers the entire Gulf of St. Lawrence in January and February.

Ice helps navigation by preventing the formation of waves, and therefore spray, and prevents the icing of ships.

Watershed

With the draining of the Champlain Sea, due to a rebounding continent from the Last Glacial Maximum, the St. Lawrence River was formed. The Champlain Sea lasted from about 13,000 years ago to about 10,000 years ago and was continuously shrinking during that time, a process that continues today. The head of the St. Lawrence River, near Lake Ontario, is home to the Thousand Islands.

Today, the St. Lawrence River begins at the outflow of Lake Ontario and flows adjacent to Cape Vincent, Gananoque, Clayton, Alexandria Bay, Brockville, Morristown, Ogdensburg, Massena, Cornwall, Montreal, Trois-Rivières, and Quebec City before draining into the Gulf of St. Lawrence, often given as the largest estuary in the world. The estuary begins at the eastern tip of Île d'Orléans, just downstream from Quebec City. The river becomes tidal around Quebec City.

The St. Lawrence River runs 3,058 kilometres (1,900 miles) from the farthest headwater to the mouth and 1,197 kilometres (743.78 mi) from the outflow of Lake Ontario. These numbers include the estuary; without the estuary, the length from Lake Ontario is 500 kilometres (311 mi). The farthest headwater is the North River in the Mesabi Range at Hibbing, Minnesota. Its drainage area, which includes the Great Lakes, the world's largest system of freshwater lakes, is 1,344,200 square kilometres (518,998.5 square miles), of which 839,200 km2 (324,016.9 sq mi) is in Canada and 194,981.6 square miles (505,000 km2) is in the United States. The basin covers parts of Ontario and Quebec in Canada, parts of Minnesota, Wisconsin, Illinois, Indiana, Ohio, Pennsylvania, New York, Vermont, and nearly the entirety of the state of Michigan in the United States. The average discharge below the Saguenay River is 16,800 cubic metres per second (590,000 cu ft/s). At Quebec City, it is 12,101 m3/s (427,300 cu ft/s). The average discharge at the river's source, the outflow of Lake Ontario, is 7,410 m3/s (262,000 cu ft/s).

The St. Lawrence River includes Lake Saint Francis at Salaberry-de-Valleyfield, Lake Saint-Louis south of Montreal and Lake Saint Pierre east of Montreal. It encompasses four archipelagoes: the Thousand Islands chain near Alexandria Bay, New York and Kingston, Ontario; the Hochelaga Archipelago, including the Island of Montreal and Île Jésus (Laval); the Lake St. Pierre Archipelago (classified a biosphere world reserve by the UNESCO in 2000) and the smaller Mingan Archipelago. Other islands include Île d'Orléans near Quebec City and Anticosti Island north of the Gaspé. It is the second-longest river in Canada.

Lake Champlain and the Ottawa, Richelieu, Saint-Maurice, Saint-François, Chaudière and Saguenay rivers drain into the St. Lawrence.

The St. Lawrence River is in a seismically active zone where fault reactivation is believed to occur along late Proterozoic to early Paleozoic normal faults related to the opening of the Iapetus Ocean. The faults in the area are rift-related and comprise the Saint Lawrence rift system.

According to the United States Geological Survey, the St. Lawrence Valley is a physiographic province of the larger Appalachian division, containing the Champlain section. However, in Canada, where most of the valley is, it is instead considered part of a distinct St. Lawrence Lowlands physiographic division, and not part of the Appalachian division.

Sources

The source of the North River in the Mesabi Range in Minnesota (Seven Beaver Lake) is considered to be the source of the St. Lawrence River. Because it crosses so many lakes, the water system frequently changes its name. From source to mouth, the names are:

The St. Lawrence River also passes through Lake Saint-Louis and Lake Saint-Pierre in Quebec.

Tributaries

The St. Lawrence River is the largest tributaries of the Great Lakes.

The St. Lawrence River tributaries are listed upstream from the mouth. The major tributaries of the inter-lake sections are also shown, as well as the major rivers that flow into the Great Lakes. Great Lakes tributaries are listed in alphabetical order.

The list includes all tributaries with a drainage area of at least 1,000 square kilometres and an average flow of more than 10 cubic metres per second.

Left tributaryRight tributaryLength (km)Basin size (km2)Average discharge (m3/s)
St. Lawrence River
Godbout1121,930.144.4
Frankquelin67.5582.912.1
Manicouagan22145,9081,020
Outardes49919,057400
Mitis511,806.437
Betsiamites44418,984.1366.7
Laval42641.613
Rivière du Sault aux Cochons1281,94638.7
Rimouski119.21,63530.8
Portneuf552,457.652.3
Rivière des Escoumins84810.517.5
Rivière des Trois-Pistoles4396618.4
Verte507.910.2
Saguenay17087,635.41,893.9
Rivière du Loup101.31,05918.5
Malbaie1611,861.139.1
Rivière-Ouelle73.4850.616.8
Rivière du Gouffre76.11,010.123.5
Montmagny (Rivière du Sud)86.51,994.646.7
Sainte-Anne971,07731.5
Montmorency103.71,157.635.6
Saint-Charles25483.413.6
Etchemin1241,443.434.5
Chaudière1856,682146.4
Jacques-Cartier1782,51571.3
Rivière du Chêne80.6855.921.1
Sainte-Anne1232,753.373.4
Batiscan1964,690107.1
Bécancour2102,60763.2
Saint-Maurice56341,994.3730
Nicolet1373,38077.8
Rivière du Loup1021,642.927.8
Saint François21810,230237.8
Yamaska1604,784110.1
Maskinongé401,205.721.3
Richelieu12423,717.7455.8
L'Assomption2004,22078.6
Ottawa1,271147,405.81,948.8
Châteauguay1212,466.743.8
Rivière aux Saumons70.61,065.220.2
St. Regis River1382,219.644
Raquette2353,25074.4
Grasse1171,657.932.9
Oswegatchie2204,12088.3
Gananoque909.512.2
Niagara
Tonawanda Creek1401,70027.2
Detroit
Rouge2041,58010.7
St. Clair River
Sydenham1652,727.614.3
Belle118.3556.44.4
Black130.41,821.99.2
Great Lakes
Lake Ontario
Black2014,964.8159.5
Credit901,0008.1
Genesee2536,507.7107.5
Humber1001,008.47.5
Moira982,73632.6
Napanee601,099.212.6
Niagara58682,350.95,885
Oak Orchard95.2804.313
Oswego3813,266255
Salmon1351,53418.2
Salmon71820.521.9
Sandy Creek53501.911
Trent9013,014.7154.6
Welland1401,136.48.7
Lake Erie
Black681,2179.8
Buffalo131,186.417.4
Cattaraugus Creek1091,510.124
Cuyahoga136.62,377.629
Detroit45595,0525,300
Grand2806,763.845
Grand165.31,873.623.8
Huron2102,145.220.4
Huron241,055.68.8
Maumee22016,460164.1
Portage66.81,574.611.3
Raisin2242,78022.8
Sandusky2143,262.126.1
Lake St. Clair
Clinton1341,970.919.8
St. Clair River65.2583,508.75,200
Thames2735,82552.9
Lake Huron
Au Gres75.21,2627.2
Au Sable2225,468.536.4
Ausable641,1428.1
Cheboygan613,880.132.5
French11019,100207
Garden1,061.714.6
Magnetawan1753,041.924.7
Maitland1502,59221.4
Mississagi2669,270118
Musquash294,591.743.7
Nottawasaga1203,082.418.8
SaginawShiawassee21615,525.6136.7
St. Marys River119.9211,833.32,135
Sauble1,109.77.6
Saugeen1604,12081.8
Seguin401,0239.7
Serpent1,49510.2
Severn306,039.256.9
Spanish33813,368.3150
Thessalon1,125.48.3
Thunder Bay121.33,382.119.2
Whitefish1,318.97.2
Lake Michigan
Burns Waterway35.61,033.28.9
Calumet661,183.810
Cedar1081,158.36.9
Elk1211,379.512.5
Escanaba842,39028.1
Ford1741,414.710.7
Fox32016,650143.8
Grand40615,206.6143
Kalamazoo2105,23052.8
Manistee3104,60047.5
Manistique114.63,78052.7
Manitowac57.61,552.410.6
Menomonee18710,56999.6
Milwaukee1672,271.517.1
Muskegon3487,029.860.8
Oconto91.62,474.919.8
Pere Marquette102.82,074.618
Peshtigo2192,856.321.9
Shebaygan1301,2268.8
St. Joseph River34012,130142.2
White381,45813
Lake Superior
Agawa1021,057.829.1
Aguasabon70964.316.8
Bad119.62,659.844.7
Batchawana951,396.136.7
Black66.1724.315.1
Black Sturgeon722,815.643.1
Brule65699.710
Chipewa40920.922.4
Dog50.91,333.528
Goulais702,07142.1
Gravel700.112.1
Kaministiquia957,903.199.4
Little Pic1,459.121
MagpieMichipicoten817,446.7145.8
Montreal1303,45284
Montreal76.9861.912.8
Nemadji113.91,158.418.6
Nipigon4825,645.4383.6
Old Woman558.810.9
Ontonagon403,720.275.8
Pic1886,430109.9
Pigeon801,610.625.1
Presque Isle67.81,088.920.3
Pukaskwa801,308.324.6
Saint Louis3099,410146.7
Sand56537.713
Steel1701,298.818.3
Sturgeon1711,892.243.1
Tahquamenon143.42,25846.3
Two Hearted3857511.7
White1405,228.395.7
Wolf650.210
Source

Discharge

YearAverage discharge
Quebec CityPointe-des-Monts
200710,967 m3/s (387,300 cu ft/s)16,600 m3/s (590,000 cu ft/s)
200812,550 m3/s (443,000 cu ft/s)18,100 m3/s (640,000 cu ft/s)
200912,166 m3/s (429,600 cu ft/s)17,227 m3/s (608,400 cu ft/s)
201011,691 m3/s (412,900 cu ft/s)16,187 m3/s (571,600 cu ft/s)
201113,221 m3/s (466,900 cu ft/s)18,616 m3/s (657,400 cu ft/s)
201211,291 m3/s (398,700 cu ft/s)16,704 m3/s (589,900 cu ft/s)
201312,090 m3/s (427,000 cu ft/s)17,098 m3/s (603,800 cu ft/s)
201412,563 m3/s (443,700 cu ft/s)18,059 m3/s (637,700 cu ft/s)
201511,425 m3/s (403,500 cu ft/s)17,310 m3/s (611,000 cu ft/s)
201612,411 m3/s (438,300 cu ft/s)17,563 m3/s (620,200 cu ft/s)
201714,309 m3/s (505,300 cu ft/s)19,213 m3/s (678,500 cu ft/s)
201813,220 m3/s (467,000 cu ft/s)16,884 m3/s (596,300 cu ft/s)
201915,154 m3/s (535,200 cu ft/s)21,004 m3/s (741,700 cu ft/s)
202014,113 m3/s (498,400 cu ft/s)18,996 m3/s (670,800 cu ft/s)
202111,344 m3/s (400,600 cu ft/s)16,093 m3/s (568,300 cu ft/s)
202213,135 m3/s (463,900 cu ft/s)17,902 m3/s (632,200 cu ft/s)
202313,560 m3/s (479,000 cu ft/s)18,799 m3/s (663,900 cu ft/s)

Biodiversity

The diversity of the St. Lawrence River includes:

Marine mammals

fin whales off Tadoussac

Large marine mammals travel in all the seas of the earth, the research and observations of these giants concern fishermen and shipping industry, exercise a fascination and a keen interest for laymen and, subjects of endless studies for scientists from Quebec, Canada and around the world.

Thirteen species of cetaceans frequent the waters of the estuary and the Gulf of St. Lawrence:

  1. Northern bottlenose whale
  2. Delphinapterus leucas (Beluga Whale)
  3. Sperm whale
  4. Atlantic white-sided dolphin
  5. White-beaked dolphin
  6. Orca
  7. Long-finned pilot whale
  8. Phocoena phocoena (Harbour Porpoise)
  9. North Atlantic right whale
  10. Common minke whale
  11. Blue whale
  12. Humpback whale
  13. Fin whale

History

Reproduction of map of 1543 showing Cartier's discoveries (c. 1909)
Basque settlements and sites dating from the 16th and 17th centuries
The St. Lawrence River with land depicted on both sides. There is a canoe and a boat on the river and birds flying over the river.
Watercolour (c.1792) by Elizabeth Simcoe depicting a bend in the St. Lawrence River in Quebec

First Nations

Flowing through and adjacent to numerous Indigenous homelands, the river was a primary thoroughfare for many peoples. Beginning in Dawnland at the Gulf of St. Lawrence, the river borders Mi'kma'ki in the South (what is today known as the Canadian Maritimes), and Nitassinan in the North, the national territory of the Innu people. On the south shore beyond the Mi'kmaw district of Gespe'gewa'ki, the river passes Wolastokuk (the Maliseet homeland), Pαnawαhpskewahki (the Penobscot homeland), and Ndakinna (the Abenaki homeland). Continuing, the river passes through the former country of the St. Lawrence Iroquois and then three of the six homelands of the Haudenosaunee: the Mohawk or Kanienʼkehá꞉ka, the Oneida or Onyota'a:ka, and the Onondaga or Onöñda’gaga’.

In the early 17th century, the Wendat Nation migrated from their original country of Huronia to what is now known as Nionwentsïo centred around Wendake. Nionwentsïo occupies both the north and south shores of the river, overlapping with Nitassinan and the more western Wabanaki or Dawnland countries. Adjacent on the north shore is the Atikamekw territorial homeland of Nitaskinan and, upstream, the further reaches of Anishinaabewaki, specifically the homelands of the Algonquin and Mississauga Nations.

European exploration

The Norse explored the Gulf of St. Lawrence in the 11th century and were followed by fifteenth- and early sixteenth-century European mariners, such as John Cabot, and the brothers Gaspar and Miguel Corte-Real. The first European explorer known to have sailed up the St. Lawrence River itself was Jacques Cartier. At that time, the land along the river described as "about two leagues, a mountain as tall as a heap of wheat" was inhabited by the St. Lawrence Iroquoians. During Cartier's second voyage in 1535, because Cartier arrived in the estuary on Saint Lawrence's feast day 10 August, he named it the Gulf of Saint Lawrence.

The St. Lawrence River is today partly within the U.S. and as such is that country's sixth oldest surviving European place-name.

Early colonists

The earliest regular Europeans in the area were the Basques, who came to the St Lawrence Gulf and River in pursuit of whales from the early 16th century. The Basque whalers and fishermen traded with indigenous Americans and set up settlements, leaving vestiges all over the coast of eastern Canada and deep into the St. Lawrence River. Basque commercial and fishing activity reached its peak before the Armada Invencible's disaster (1588), when the Basque whaling fleet was confiscated by King Philip II of Spain. Initially, the whaling galleons from Labourd were not affected by the Spanish defeat.

Until the early 17th century, the French used the name Rivière du Canada to designate the St. Lawrence upstream to Montreal and the Ottawa River after Montreal. The St. Lawrence River served as the main route for European exploration of the North American interior, first pioneered by French explorer Samuel de Champlain.

Colonial control

Control of the river was crucial to British strategy to capture New France in the Seven Years' War. Having captured Louisbourg in 1758, the British sailed up to Quebec the following year thanks to charts drawn up by James Cook. British troops were ferried via the St. Lawrence to attack the city from the west, which they successfully did at the Battle of the Plains of Abraham. The river was used again by the British to defeat the French siege of Quebec under the Chevalier de Lévis in 1760.

In 1809, the first steamboat to ply its trade on the St. Lawrence was built and operated by John Molson and associates, a scant two years after Fulton's steam-powered navigation of the Hudson River. The Accommodation with ten passengers made her maiden voyage from Montreal to Quebec City in 66 hours, for 30 of which she was at anchor. She had a keel of 75 feet, and a length overall of 85 feet. The cost of a ticket was eight dollars upstream, and nine dollars down. She had berths that year for twenty passengers. Within a decade, daily service was available in the hotly-contested Montreal-Quebec route.

Because of the virtually impassable Lachine Rapids, the St. Lawrence was once continuously navigable only as far as Montreal. Opened in 1825, the Lachine Canal was the first to allow ships to pass the rapids. An extensive system of canals and locks, known as the St. Lawrence Seaway, was officially opened on 26 June 1959 by Elizabeth II (representing Canada) and President Dwight D. Eisenhower (representing the United States). The Seaway (including the Welland Canal) now permits ocean-going vessels to pass all the way to Lake Superior.

Modern Canada

Alcoa, Reynolds Metals Company, and General Motors (GM) Central Foundry operated along the St. Lawrence River and its tributaries for decades. The Alcoa plant opened in 1903, and Reynolds and GM began operations in the late 1950s. These facilities released toxic substances into the St. Lawrence River and the surrounding area, including PCBs, PAHs, cyanide, fluoride, and dioxins.

During the Second World War, the Battle of the St. Lawrence involved submarine and anti-submarine actions throughout the lower St. Lawrence River and the entire Gulf of St. Lawrence, Strait of Belle Isle and Cabot Strait from May to October 1942, September 1943, and again in October and November 1944. During this time, German U-boats sank several merchant marine ships and three Canadian warships.

In the late 1970s, the river was the subject of a successful ecological campaign (called "Save the River"), originally responding to planned development by the United States Army Corps of Engineers. The campaign was organized, among others, by Abbie Hoffman.

In popular culture

Grand canoe reception for the Prince of Wales on the St. Lawrence, 1860

See also

Bibliography

  • Creighton, Donald Grant (2002) [1937], (reprint), University of Toronto Press, ISBN 0-8020-8418-4
  • Dawson, Samuel Edward (2003), , Heritage Books, ISBN 0-7884-2252-9
  • Denison, Merrill (1955). The Barley and the Stream: The Molson Story. McClelland & Stewart Limited.
  • Ellis, William S. (May 1980). "Canada's Highway to the Sea". National Geographic. Vol. 157, no. 5. pp. 586–623. ISSN . OCLC .
  • McNeese, Tim (2005), , Chelsea House Publishers, ISBN 0791082458
  • Parham, Claire Puccia (2009), , Syracuse University, ISBN 978-0-8156-0913-1
  • Stagg, Ronald (2010), , Dundurn Press, ISBN 978-1-55002-887-4

External links

  • , 1969, Eric W. Morse, M.A.;F.R.G.S, 121 p.
  • The Saint Lawrence Its Basin & Border-Lands, 1905, Dr. S. E. Dawson, 584 p.
  • , Radio Aids to Marine Navigation 2024, (Atlantic, St. Lawrence, Great Lakes, Lake Winnipeg, Arctic and Pacific) Fisheries and Oceans Canada, 298 pages
  • – Historical essay, illustrated with drawings and photographs
  • David J. W. Piper et Adam Macdonald, 2001, 11 page