Caution at Lock 19. The RR bridge just east if it is normally 21' 0". If you are east of the lock waiting for passage, the water will rise when the lockmaster dumps the chamber, and there will be less than 21'. I lost my anchor light there when that happened, my clearance is 20'10" Bob -- Bob Kunath Sans Souci bobkunath at gmail.com cell: (847) 921-8175