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Lock and Dam 6

Lock and Dam 6 were built from 1888-1891 and support a twenty one mile long pool of water. The original dam was a timber crib structure, consisting of an outside frame of timbers filled with dirt and rock, and the original lock was stone masonry. The structures are located ninety six miles above the mouth of the Ohio River. A cutoff wall was placed inside of the lock in 2006.


  • 1888-1891 Original construction of lock and dam
  • Approximately 1911 Concrete overlay on the timber crib dam
  • 1966 Steel sheet pilings were driven upstream of the dam and the upper slope was leveled off with new concrete
  • 1983 Over 22,000 tons of derrick stone were placed to help fill voids in the dam and to protect the far abutment
  • 1994 The river guide wall was removed, the downstream face voids were filled with a new concrete overlay, Derrick stone was placed below the dam
  • 2006 Concrete cutoff wall and water release valve were placed in the lock chamber


Locks and Dams