If you mean the Craig Howell and Rhiwbach New Quarry?
Well, Craig Howell goes nowhere, just to a flooded incline after about 100 yards.
The Rhiwbach new quarry I think will have more to look at, maybe on at least one other level. Where I got was thru the thick orange sludge and to some water of unknown depth, i suspect waist deep from its relative position to the tunnel roof. But I have seen pics of explorers at lower levels (taken a while ago though)
Will go back sometime with waders and a stick to test the depth. There is mention somewhere of a shaft as well!!
May the fleas of a thousand camels infest the crotch of the person who
screws up your day and may their arms be too short to scratch.