Lock and Dam 12 were built from 1907-1910 and support a nineteen mile long pool of water. The original lock and dam were concrete structures. The structures are located two hundred and twenty one miles above the mouth of the Ohio River. A water release valve was installed in 1998 to transfer water downstream in times of drought.
History
- 1907-1910 Original construction of lock and dam
- 1997-1998 Sheet pilling backfilled with gravel was placed across the main dam and capped with concrete, abutments were rebuilt with new release valves, derrick stone was placed below the dam, concrete cutoff wall was built in the lock chamber, lock filling valves were sealed