Swing bridges are a major feature of this canal. They all feature a narrowing to just wider than a boat, and are built to a similar design, but there are many variations. The bridge itself can default to open or closed, or be absent. If operable the mechanism can be electrically operated, hand cranked hydraulic, or simply a see-saw. On my walk back I got a good look at one bridge which is locked open. Opening the padlock buried in the mechanism would allow it to be used, but who has the key?