The description for chest deep moving water says it is impassible. This is not true. The toons can and will cross chest deep moving water, it just really slows them down. Given a choice between shallow moving water and chest deep moving water the toons will path through the shallow water first. Not sure if the holds true for distance though, such as have one shallow zone in a river. This is in the current version 1.5. Also, just what I have noticed, let me know if it is something just I am experiencing.