Here ya go higgs.
There was actually too much water in the Trent Severn waterway - no depth problem that I am aware of.Here's a site for you to check out the details of the Trent Severn Waterway. Go to the National Historic Parks section on the link below, look up Trent Severn Waterway National Historic Site, and there you go.Read up a little on the history of this 356km historic waterway. Enjoy,