Lock and Dam 11 were built from 1904-1906 and support a twenty mile long pool of water. The original lock and dam were entirely built of concrete. The structures are located two hundred and one miles above the mouth of the Ohio River. A water release valve was installed in 1996 to transfer water down stream in times of drought.
History
- 1904-1906 Original construction of lock and dam
- 1996-1997 Sheet piling backfilled with gravel was placed across the main dam and capped with concrete, abutments were rebuilt with new release valves, derrick stone was place below the dam, a concrete cutoff wall was built in the lock chamber, lock filling valves were sealed