The Saint Lawrence River Divide is a continental divide in central and eastern North America that separates the Great Lakes-St. Lawrence River Basin from the southerly Atlantic Ocean watersheds. Water, including rainfall and snowfall, lakes, rivers and streams, north and west of the divide, drains into the Gulf of St. Lawrence or the Labrador Sea; water south and east of the divide drains into the Atlantic Ocean (east of the Eastern Continental Divide, ECD) or Gulf of Mexico (west of the ECD). The divide is one of six continental divides in North America that demarcate several watersheds that flow to different gulfs, seas or oceans.
The St. Lawrence River Divide follows the southern boundary of the St. Lawrence River watershed, except for its easternmost portion, which extends into New Brunswick and Nova Scotia.A map of the principal hydrological divides of North America. The St. Lawrence River Divide (magenta line) separates the Great Lakes-St. Lawrence watershed from the southerly watersheds of the Atlantic Ocean.
In Illinois and Indiana, it follows the Valparaiso Moraine separating the watershed of Lake Michigan to the north from that of the Illinois River to the south. Between roughly South Bend and Fort Wayne the divide zig-zags among hilly terrain. After that it follows the Wabash Moraine in western Ohio, separating the first the watersheds of the Maumee River to the north and Wabash River to the south, and later the Sandusky River to the north from the Scioto River to the south.
After passing around Chautauqua Lake, which is in the Allegheny River watershed, the divide turns away from Lake Erie and it crosses into the Allegheny Plateau region. It follows the boundary of Cattaraugus Creek and then the Genesee River basins to the north, while continuing to drain to the Allegheny River to the south. After reentering Pennsylvania, the St. Lawrence River divide meets the triple divide at the northern end of the Eastern Continental Divide.
As the divide is generally in close proximity to each of the Great Lakes to the north, the rivers on this side of the divide are generally short. To the southwest, there are broader watersheds that are tributaries of the Upper Mississippi River and the Ohio River that ultimately drain to the Gulf of Mexico. To the southeast are several major river watersheds that drain directly to the Atlantic Ocean.
^"Limits of Oceans and Seas, 3rd edition" (PDF). International Hydrographic Organization. 1953. Retrieved 29 December 2020.
^Gonzalez, Mark; Joel Festa (2007). "Continental Divides in North Dakota and North America" (PDF). NDGS Newsletter. North Dakota Geographical Society. Retrieved 2016-01-19.
^"USGS/contours ArcGIS". ArcGIS. State of Ohio Dept. of Natural Resources. Retrieved 15 May 2016.
lawrence, river, divide, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, ja. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources St Lawrence River Divide news newspapers books scholar JSTOR January 2023 Learn how and when to remove this template message Map all coordinates using OpenStreetMap Download coordinates as KML GPX all coordinates GPX primary coordinates GPX secondary coordinates The Saint Lawrence River Divide is a continental divide in central and eastern North America that separates the Great Lakes St Lawrence River Basin from the southerly Atlantic Ocean watersheds Water including rainfall and snowfall lakes rivers and streams north and west of the divide drains into the Gulf of St Lawrence or the Labrador Sea water south and east of the divide drains into the Atlantic Ocean east of the Eastern Continental Divide ECD or Gulf of Mexico west of the ECD The divide is one of six continental divides in North America that demarcate several watersheds that flow to different gulfs seas or oceans The St Lawrence River Divide follows the southern boundary of the St Lawrence River watershed except for its easternmost portion which extends into New Brunswick and Nova Scotia A map of the principal hydrological divides of North America The St Lawrence River Divide magenta line separates the Great Lakes St Lawrence watershed from the southerly watersheds of the Atlantic Ocean Contents 1 Course 1 1 West of the triple divide 1 2 East of the triple divide 2 Hydrology 3 Canals 4 Locations 5 ReferencesCourse editWest of the triple divide edit The divide has its origin at Hill of Three Waters triple divide on the Laurentian Divide approx 2 miles north of Hibbing Minnesota It follows the western boundary of the Saint Louis River watershed and then winds through the Northern Highland of Wisconsin south of the shore of Lake Superior It then follows the boundary between the Wisconsin River and Fox River watersheds In Illinois and Indiana it follows the Valparaiso Moraine separating the watershed of Lake Michigan to the north from that of the Illinois River to the south Between roughly South Bend and Fort Wayne the divide zig zags among hilly terrain After that it follows the Wabash Moraine in western Ohio separating the first the watersheds of the Maumee River to the north and Wabash River to the south and later the Sandusky River to the north from the Scioto River to the south The divide then generally parallels the Portage Escarpment near the southern shore of Lake Erie through eastern Ohio Pennsylvania and western New York This portion s northern watersheds include several smaller rivers that drain directly to Lake Erie the largest of which is the Cuyahoga River the southern watersheds are the Muskingum River Beaver River and Allegheny River After passing around Chautauqua Lake which is in the Allegheny River watershed the divide turns away from Lake Erie and it crosses into the Allegheny Plateau region It follows the boundary of Cattaraugus Creek and then the Genesee River basins to the north while continuing to drain to the Allegheny River to the south After reentering Pennsylvania the St Lawrence River divide meets the triple divide at the northern end of the Eastern Continental Divide East of the triple divide edit Through central New York the divide separates the Oswego River watershed which contains most of the Finger Lakes region to the north from the Susquehanna River basin to the south The divide then follows the boundary of the Hudson River watershed to the south through the Adirondacks dipping briefly south of Lake George and Lake Champlain before following the northern boundary of the Connecticut River watershed For its next stretch the divide follows the boundary of the Saint John River watershed to the south The divides becomes the international border between Maine and Quebec between the headwaters of Halls Stream and the Southwest Branch Saint John River The divide then continues into the Notre Dame Mountains in Quebec then turns southeasterly through central New Brunswick From there the divide borders the Petitcodiac River basin crosses through the Isthmus of Chignecto and runs easterly along the Cobequid Mountains along the northern coast of Nova Scotia and eventually to Cape Canso 1 Hydrology editAs the divide is generally in close proximity to each of the Great Lakes to the north the rivers on this side of the divide are generally short To the southwest there are broader watersheds that are tributaries of the Upper Mississippi River and the Ohio River that ultimately drain to the Gulf of Mexico To the southeast are several major river watersheds that drain directly to the Atlantic Ocean Canals editFour canals cross the divide The Champlain Canal connects Lake Champlain to the Hudson River watershed The Erie Canal connects Lake Erie to the Hudson River watershed The Chicago Sanitary and Ship Canal crosses the Chicago Portage and connects Lake Michigan to the Mississippi River watershed The Portage Canal connects the Fox River to the Wisconsin River at Portage Wisconsin Historically there were additional canals e g the Ohio and Erie Canal but most of these are no longer in operation Locations editThis list is incomplete you can help by adding missing items November 2009 SLRD points Area Point Summit or other featureMinnesota The Hill of Three Waters 2 1 732 feet 528 m 47 28 21 N 92 57 51 W 47 472366 N 92 964181 W 47 472366 92 964181 Triple watershed point watersheds of the Hudson Bay Gulf of Mexico amp Gulf of Saint Lawrence Nearest town Hibbing MNMinnesota Interstate 35 1 140 feet 350 m 46 31 57 N 92 37 50 W 46 532422 N 92 630497 W 46 532422 92 630497 Near Barnum MinnesotaOhio Interstate 75 1 023 feet 312 m 40 29 03 N 84 10 10 W 40 48426 N 84 16952 W 40 48426 84 16952 I 75 passes over the Saint Lawrence River Divide between Pusheta Creek Great Lakes Basin and Loramie Creek Mississippi basin near mile marker 105 kilometer 165 3 Pennsylvania Interstate 86 1 488 feet 454 m 42 08 20 N 79 49 26 W 42 138779 N 79 823920 W 42 138779 79 823920 Crossing 1 of 5New York Interstate 86 1 650 feet 500 m 42 08 38 N 79 40 22 W 42 143894 N 79 672828 W 42 143894 79 672828 Crossing 2 of 5New York Interstate 86 1 579 feet 481 m 42 08 52 N 79 39 12 W 42 147870 N 79 653323 W 42 147870 79 653323 Crossing 3 of 5New York New York State Route 16 1 680 feet 510 m 42 25 10 N 78 29 40 W 42 419347 N 78 494526 W 42 419347 78 494526 Machias New York just south of Lime LakeNew York Interstate 86 1 797 feet 548 m 42 12 44 N 78 12 31 W 42 212286 N 78 208695 W 42 212286 78 208695 Crossing 4 of 5Pennsylvania Ulysses Township Potter County 4 2 523 feet 769 m 41 50 48 N 77 50 14 W 41 84667 N 77 83722 W 41 84667 77 83722 triple watershed point watersheds of the Atlantic Seaboard Gulf of Mexico amp Gulf of Saint Lawrence at the respective headwaters of Pine Creek West Branch Susquehanna River the Allegheny River and the Genesee River New York Interstate 86 2 104 feet 641 m 42 18 40 N 77 51 47 W 42 311058 N 77 863099 W 42 311058 77 863099 Crossing 5 of 5References edit Limits of Oceans and Seas 3rd edition PDF International Hydrographic Organization 1953 Retrieved 29 December 2020 Gonzalez Mark Joel Festa 2007 Continental Divides in North Dakota and North America PDF NDGS Newsletter North Dakota Geographical Society Retrieved 2016 01 19 USGS contours ArcGIS ArcGIS State of Ohio Dept of Natural Resources Retrieved 15 May 2016 Eastern Triple Divide Retrieved from https en wikipedia org w index php title St Lawrence River Divide amp oldid 1191176904, wikipedia, wiki, book, books, library,
