I did a google search of the Mississippi Queen and found some cool pictures of the MQ at old lock #50 which was just above Cave in Rock, Illinois on the Ohio river, the lock was removed in 1980. Both links are to the same website, the first shows the MQ running the pass at lock #50. It must be her maiden voyage or not long after, she still has the radials around the outside of the wheel. She has a towboat with one empty on her starboard side to help fight the current over the pass.
The second link is to the same website and shows the MQ locking through Lock #50. The picture of her leaving the lock shows some pretty serious damage to the port side of the paddlewheel.
If the links don't work, just google Mississippi queen lock #50.