Lock and Dam 8 were built from 1898-1900 and support a seventeen and a half 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 one hundred and forty miles above the mouth of the Ohio River. A cutoff wall was placed inside of the lock in 2001.
History
- 1898-1900 Original construction of lock and dam
- 1993-1995 River guide wall was removed, downstream face voids were filled with a new concrete overlay, derrick stone was placed below the dam
- 2001 Concrete cutoff wall was built in the lock chamber, lock filling valves were sealed
- 2002 Grout bags were placed along the far abutment to cut off leakage