https://youtu.be/2kLAsQf9Jic
This is the only limestone spring fed river in the British Isles. The upper river, about two miles of it, dries up every summer due to historic industrial activity that still makes the upper river a death trap for everything that moved into it during the winter and spring. Fish rescues only catch some of the trout and nothing rescues the millions of invertebrates that die when the river dries up.
Regular Rod