Hi and thanks for your contributions to the map! :)
Just a nitpick: in the Future please take care with directions on those weirs, this one was the wrong way around (iD shows little arrows towards the lower parts and the shortcut "v" just flips it. Same goes for retaining walls and about anything with a high side and a low side.)

Do you happen to have some background knowledge about these weirs? They did some kind of dance between states of very calm laminar flow and a weird "flapping" which created a bit of noise and looked quite interesting. Not sure if that was by design or accident / wind.

Cheers
David