The damage to the lock door is very odd unless it was struck by a barge, which is what I bet happened, but I don't know why it's not being reported. Wilson Lock was hit by a barge in 2006 and suffered a multi-week outage.
All of the existing Ohio River locks are 1200ft. except for four dams closest to Pittsburgh. The Ohio River is really like an "interstate" for barges, since locking through a 1200ft. lock with a 15 barge tow is pretty damn quick and simple. The new Olmstead lock & dam will replace dams 51 and 52, which are wicket dams near Paducah. Olmstead will have two 1200ft. locks.
So far as I know the only 1200ft. river locks in America are all on the Ohio, although there is one 1,000ft. lock (Pickwick) on the Tennessee, and a new 1200ft. lock is being built at Kentucky Dam on the Tennessee.
The 1,000ft. Pickwick Lock was built in anticipation of Tennessee-Tombigbee traffic that never materialized. The 1,000ft. lock is totally idiotic though because it requires 15-barge tows to deface. The towboat has to ride down the auxiliary lock and then pull out its tow on the other side. I've never heard an explanation for why something this idiotic was built.
All the Tennessee locks with the exception of Pickwick are 600ft. up to Chattanooga. Also all the upper Mississippi locks are also 600ft. This requires tows greater than six barges (unless two are lashed to the side of the towboat) to break into two sections. The real problem starts when those locks are closed and the auxiliary 300ft. locks are used, in which case only one barge can be brought through at a time. Obviously it ends up taking 10 hours for a full tow to lock through.