I haven't got any photos of the river at the weir at its highest or lowest I've seen it, but these should give some idea. The water is normally lower and the concrete walls can be clearly seen, but the river's been pretty high lately.
It's high here but you can still - just - see the concrete walls.
Then the water got higher.
I didn't see it at its highest but I can guess what it must have been like from the tree it left behind!