MIAMI RIVER

also called Great Miami River, river issuing from Indian Lake, Logan County, west central Ohio, U.S., and flowing south-southwest past Dayton, Middletown, and Hamilton to enter the Ohio River west of Cincinnati after a course of 160 mi (257 km). Its chief tributaries are the Stillwater, Mad, and Whitewater rivers. After severe flooding in 1913, the Miami Conservancy District was established (1915) and an extensive system of levees and retarding basins were built in the river valley.