Ohio River topographic map
Interactive map
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About this map
Name: Ohio River topographic map, elevation, terrain.
Location: Ohio River, United States (36.98350 -89.17727 40.69668 -80.01712)
Average elevation: 961 ft
Minimum elevation: 259 ft
Maximum elevation: 6,381 ft
The lower Ohio River just below Louisville is obstructed by rapids known as the Falls of the Ohio where the elevation falls 26 feet (7.9 m) in 2 miles (3.2 km) restricting larger commercial navigation, although in the 18th and early 19th century its three deepest channels could be traversed by a wide variety of craft then in use. In 1830, the Louisville and Portland Canal (now the McAlpine Locks and Dam) bypassed the rapids, allowing even larger commercial and modern navigation from the Forks of the Ohio at Pittsburgh to the Port of New Orleans at the mouth of the Mississippi on the Gulf of Mexico.
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