Crook Gill, Cray

Does anybody know anything about Crook gill nr Cray (upper Wharfdale ).

I know its not a cave but still limestone with vertical drops.
I noticed some old bolts and krabs at the top of one of the waterfalls.
Any body know anything about these bolts, are there bolts on every waterfall?

I recon some one on the forum would know.

Thanks

 
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