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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 Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the United States. [3] In the United States, the Mississippi drains about 41% of the country's rivers. [4]
The Middle Mississippi is relatively free-flowing. From St. Louis to the Ohio River confluence, the Middle Mississippi falls 220 feet (67 m) over 180 miles (290 km) for an average rate of 1.2 feet per mile (23 cm/km). At its confluence with the Ohio River, the Middle Mississippi is 315 feet (96 m) above sea level.
The mound builders were a variety of pre-Columbian cultures who inhabited the areas of the Great Lakes, the Ohio River Valley, and the Mississippi River valley. Rather than the wigwam of much of the plains peoples, or the pueblo culture of the American southwest, the mound builders created giant earthwork communities. Thousands of mounds have ...
The Plaquemine culture was an archaeological culture in the lower Mississippi River Valley in western Mississippi and eastern Louisiana. Good examples of this culture are the Medora site (the type site for the culture and period) in West Baton Rouge Parish, Louisiana , and the Anna , Emerald Mound , Winterville and Holly Bluff sites located in ...
It encompasses the entire Mississippi River from Lake Itasca, Minnesota, to the Gulf of Mexico. It excludes the watersheds of the Missouri River and Ohio River, and portions of the Arkansas River and the Red River of the South. The division includes all or parts of 13 states: Arkansas, Illinois, Iowa, Kentucky, Louisiana, Michigan, Minnesota ...
This is a list of locks and dams of the Ohio River, which begins at the confluence of the Allegheny and Monongahela rivers at The Point in Pittsburgh, Pennsylvania and ends at the confluence of the Ohio River and the Mississippi River, in Cairo, Illinois. A map and diagram of U.S. Army Corps of Engineers operated locks and dams on the Ohio River.
The earliest known inhabitants of the Eastern Woodlands were peoples of the Adena and Hopewell cultures, the term for a variety of peoples, speaking different languages, who inhabited the Ohio and Mississippi river valleys between 800 BC and 800 AD, and were connected by trading and communication routes. [3]