CNN Rescuing the River A CNN Heroes Special December 8, 2014 05:18:00
Much slower. when you move the barge you have to pull up the two spuds like and course and use the crane to get the ramp on. untie it, move the tow boat in place and go wherever you're going. it's a process. >> and the river itself has hurdles, locks,29 of them on the upper mississippi alone. >> so the river is like steps, all the way down. so we're just going to go, get in the lock. it will raise us up. we'll go on to our next place. >> often the barge has to wait hours to go through a lock. once inside, the gates shut behind it. >> and it basically fills up like a bathtub, a big bathtub. >> ...
Source: archive.org