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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.
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 Point Pleasant Formation is the oldest rock unit exposed at the surface in Ohio and formed during the Late Ordovician, outcropping along the Ohio River near Cincinnati. The formation records a transition from shallow-water limestone reef formation to a deeper water environment, marked by overlying shale and limestone, which form the ...
An early map of the Falls of the Ohio; Louisville, Kentucky is in the lower right The area is located at the Falls of the Ohio, which was the only navigational barrier on the river in earlier times. The falls were a series of rapids formed by the relatively recent erosion of the Ohio River operating on 386-million-year-old Devonian hard ...
The highest level ever recorded on the Ohio River in Cincinnati was on Jan. 26, during the devastating flood of 1937. Historic crests on the Ohio River in Cincinnati. 80 feet on Jan. 26, 1937. 71. ...
The Cincinnati Arch formed during the Silurian due to gentle folding and upwarped parts of the region above the water level, separating Kentucky into two geologic basins. The upwarping of the arch continued into the Devonian , which is supported by the lack of Early Devonian rocks in central Kentucky where the arch formed.
The highest level ever recorded on the Ohio River in Cincinnati was on Jan. 26, during the devastating flood of 1937. Historic crests on the Ohio River in Cincinnati. 80 feet on Jan. 26, 1937. 71. ...
The Ohio water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage ...