If some of the resurgences could be plugged to fill the entire cave with a turbine fitted there would be plenty of electricity. There’d be a good few kWh in easegill and gg!That would be pretty good if the same water was used to generate power at Horton before joining the Ribble and generating power at Settle too.
Plug Brants Ghyll and Douk Ghyll temporarily to locate the former resurgences, remove the plugs and dig for glory. See, I'm full of useful suggestions.It'd just come squirting out of all the truncated (old, abandoned) former resurgences at progressively higher levels.