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Ohio River

geography Maturity 7-9 Next article →

The Ohio River is a huge and important waterway in the United States.

Horseshoe bend in Ohio River
Horseshoe bend in Ohio River

It flows in a southwesterly direction through the Midwest and the South. The river starts in Pittsburgh, Pennsylvania. It ends when it meets the Mississippi River at Cairo, Illinois. This river is the third largest in the U.S. by how much water flows through it. It is also the largest tributary to the Mississippi River.

Floods Recede around the Wabash-Ohio Confluence
Floods Recede around the Wabash-Ohio Confluence

This river works in many different ways today. It is no longer a natural, free-flowing river. Since 1929, people have used a process called canalization to change it. Now, the river is divided into 21 separate pools or reservoirs. This is done using 20 different locks and dams. These structures help boats move and also help create power.

Barge on Ohio River
Barge on Ohio River

Many different people have lived near the river throughout history. For thousands of years, Native Americans used the valley for trading and travel. The Mississippian culture even built large earthwork mounds in the area. Later, European explorers began to travel the river in the 1600s. One man named Arnout Viele explored the upper valley in 1693. In 1729, a French surveyor named de Léry made the first maps.

Lawrenceburg-indiana-from-above
Lawrenceburg-indiana-from-above

There are many interesting facts about the river's size and name. The name "Ohio" comes from a Seneca word meaning "good river." The river flows through or along the borders of six states. Its drainage basin actually reaches into 14 different states. It provides drinking water for five million people today. In the winter, the river can freeze over in Pittsburgh.

Karl Bodmer Travels in America (7)
Karl Bodmer Travels in America (7)

The river has always been a place of big changes. In the early 1800s, it was a border between free and slave lands. Many people used the narrow parts of the river to escape to the North for freedom. Later, pioneers used the river to travel west during the expansion of the U.S.

Steamboat "Morning Star", 1858
Steamboat "Morning Star", 1858

Today, the river is a place where different climates meet. It sits between humid continental and humid subtropical weather areas.

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🖼️ Images & Media (9)
File:Steamboat "Morning Star", 1858.jpg
Steamboat "Morning Star", 1858.jpg
File:Wheeling Suspension Bridge Lithograph.jpg
Wheeling Suspension Bridge Lithograph.jpg
File:Karl Bodmer Travels in America (7).jpg
Karl Bodmer Travels in America (7).jpg
File:Silver Bridge, 1928.jpg
Silver Bridge, 1928.jpg
File:Lawrenceburg-indiana-from-above.jpg
Lawrenceburg-indiana-from-above.jpg
File:Floods Recede around the Wabash-Ohio Confluence.jpg
Floods Recede around the Wabash-Ohio...
File:Historical Collections of Ohio- An Encyclopedia of the State; History Both General and Local, Geography with Descriptions of Its Counties, Cities and Villages, Its Agricultural, Manufacturing, Mining (14770614544).jpg
Historical Collections of Ohio- An...
File:Horseshoe bend in Ohio River.jpg
Horseshoe bend in Ohio River.jpg
File:Barge on Ohio River.jpg
Barge on Ohio River.jpg
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