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The Ohio River at Cairo is 281,500 cu ft/s (7,960 m 3 /s); [1] and the Mississippi River at Thebes, Illinois, which is upstream of the confluence, is 208,200 cu ft/s (5,897 m 3 /s). [66] The Ohio River flow is greater than that of the Mississippi River, so hydrologically the Ohio River is the main stream of the river system.
The history of human activity in Michigan, a U.S. state in the Great Lakes, began with settlement of the western Great Lakes region by Paleo-Indians perhaps as early as 11,000 B.C.E. One early technology they developed was the use of native copper, which they would fashion into tools and other implements with "hammer stones".
The first steamboat to travel the full length of the Lower Mississippi from the Ohio River to New Orleans was the New Orleans in December 1811. Its maiden voyage occurred during the series of New Madrid earthquakes in 1811–12. The Upper Mississippi was treacherous, unpredictable and to make traveling worse, the area was not properly mapped ...
A minor conflict with Ohio, known as the Toledo War, over an area including the city of Toledo, Ohio, delayed Michigan statehood, because the State of Ohio objected. 1836 Michigan accepted Ohio's claim to Toledo and the Toledo Strip and received, as compensation, the western three-fourths of the Upper Peninsula.
Michigan Territory briefly governed lands west of the Mississippi, after the statehood of Missouri left the area north of the new state as unorganized territory; this comprised what is now Iowa and that part of Minnesota west of the river. Such was the case until 1834, when that area was placed under the government of Michigan Territory.
The Northwest Territory included all the then-owned land of the United States west of Pennsylvania, east of the Mississippi River, and northwest of the Ohio River. It incorporated most of the former Ohio Country except a portion in western Pennsylvania, and eastern Illinois Country. It covered all of the modern states of Ohio, Indiana, Illinois ...
The point at which the portage crossed the low continental divide that separated waters flowing east toward Lake Michigan from waters flowing west toward the Mississippi River was a wetland that occupied the ancient stream bed of the Chicago Outlet River. Early settlers called this marshy area “Mud Lake”. [6] The total length of the portage ...
In Southeastern Michigan there is a water boundary with Canada along the entire lengths of the St. Clair River, Lake St. Clair (including the First Nation reserve of Walpole Island) and the Detroit River. The southeastern boundary ends in the western end of Lake Erie with a three-way convergence of Michigan, Ohio and Ontario.