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Description: The Markland Locks and Dam is located on the Ohio River at mile 531.5 below Pittsburgh, Pennsylvania. It is 26.5 miles upstream from Madison, Indiana and 3.5 miles downstream from Warsaw, Kentucky. The navigation locks are located on the Kentucky side of the river. The upper pool above the dam extends upstream for a distance of 95.3 miles to the Meldahl Locks and Dam at mile 436.0 and for a short distance up three navigable tributaries — the Miami, Licking, and Little Miami rivers.