The Ohio River is a major tributary of the Mississippi River in the USA.  It was heavily polluted with of PFOA (C8) for several decades beginning in the 1950s making it of interest to researchers, industry and the environmental regulatory community.

The Ohio River, which streams westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States. At the confluence, the Ohio is considerably bigger than the Mississippi (Ohio at Cairo: 281,500 cu ft/s (7,960 m3/s); Mississippi at Thebes: 208,200 cu ft/s (5,897 m3/s)) and, thus, is hydrologically the main stream of the whole river system, including the Allegheny River further upstream.

The 981-mile (1,579 km) river flows through or along the border of six states, and its drainage basin includes parts of 15 states. Through its largest tributary, the Tennessee River, the basin includes many of the states of the southeastern U.S. It is the source of drinking water for three million people.

(Source Wikipedia)

This model grid contains 1,224 cells, and is a curvilinear grid, with an average orthogonal deviation of 1.95 degrees. This grid was built using EFDC+ Explorer and Grid+. The grid starts at Captain Anthony Meldahl Locks and Dam in Foster, Kentucky and ends at Markland Locks and Dam in Warsaw, Kentucky.