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Great Miami River

Great Miami River
Great Miami River.jpg
The Great Miami River near Vandalia
Country United States
State Ohio, Indiana
Counties Logan, Shelby, Miami, Montgomery, Warren, Butler, Hamilton in Ohio; Dearborn in Indiana
Basin features
Main source Indian Lake, Russells Point, Logan County, Ohio
998 ft (304 m)
40°28′04″N 83°52′33″W / 40.46778°N 83.87583°W / 40.46778; -83.87583 (Great Miami River source)
River mouth Ohio River, Miami Township, Hamilton County, Ohio
449 feet (137 m)
39°06′31″N 84°48′52″W / 39.10861°N 84.81444°W / 39.10861; -84.81444 (Great Miami River mouth)Coordinates: 39°06′31″N 84°48′52″W / 39.10861°N 84.81444°W / 39.10861; -84.81444 (Great Miami River mouth)
Basin size 5,373 sq mi (13,920 km2)
Physical characteristics
Length 170 miles (270 km)
Discharge
  • Average rate:
    5,368 cu ft/s (152.0 m3/s)

The Great Miami River (also called the Miami River) (Shawnee: Msimiyamithiipi) is a tributary of the Ohio River, approximately 160 miles (260 km) long, in southwestern Ohio and Indiana in the United States. The Great Miami flows through Dayton, Piqua, Troy, Hamilton, and Sidney.

The river is named for the Miami, an Algonquian-speaking Native American people who lived in the region during the early days of European settlement. They were forced to relocate to the west to escape European-American settlement pressure.

The region surrounding the Great Miami River is known as the Miami Valley. This term is used in the upper portions of the valley as a moniker for the economic-cultural region centered primarily on the Greater Dayton area. As the lower portions of the Miami Valley fall under the influence of Cincinnati and the Ohio River Valley, residents of the lower area do not identify with the Miami in the same way.

The main course of the Great Miami River rises from the outflow of Indian Lake in Logan County, about 1 mile (1.6 km) southeast of the village of Russells Point, approximately 15 miles (24 km) southeast of Lima. Indian Lake is an artificial reservoir which receives the flow from the North and South forks of the Great Miami River. It flows south and southwest, past Sidney, and is joined by Loramie Creek in northern Miami County. It flows south past Piqua and Troy, and through Taylorsville Dam near Tipp City and Vandalia. It continues through Dayton, where it is joined by the Stillwater and the Mad rivers and Wolf Creek.


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