River says >3m  with this comment. The point here is that its irrelevant isnt it? The riverbanks are mapped individually so there is no real point.

Additionally going upstream there is always a point when a river becomes a stream. So where is that?

"For the sake of reference, the current world record is 8.95 meters, and the standing jump world record is 3.73 meters; the suggested value should be somewhere below 3 meters across, which is supported by some data as well."
