empty 5 gallon paint can, precariously near the edge of the port pontoon, having remained securely in place all the way from Baltimore. ... Above this point the current was greatly reduced as the locks and dam at Alton, Illinois, controlled the flow. ... Lock, the first in a series of eight between St. Louis and Lake Michigan, but the only one encountered on the Mississippi. ... Deckhands from the aquot;Java Seaaquot; in their bright orange life jackets loosened the steamboat ratchets and other rigginganbsp;...