The rise has been explored by Heb and friends who may wish to comment.
I understand that it lead to a ladderway that eventually ended at a collapse.
Yes, I've climbed the rise, with assistance from fellow MOLES - Colonel Mustard, Marra & the Late Martin Willey. The pipes come from a reservoir in a short x-cut part way up the rise. A further climb gives access to a level, which I think Roy, is a continuation of our 'Little Limestone' (LL) Level, accessed further outbye. A smaller diameter pipe runs down the rise & feeds the reservoir below . The level is badly collapsed both ways. I suspect the pipe, which exits from beneath the western roof fall (Only small - 6" diameter approx) is fed from old workings - Longholehead Whimsey was descended years ago by CATMHS and reported to be flooded part way down???
Considering the impressive size of this rise at the Low Level horizon, the top at LL Level horizon is rather insignificant looking!
My opinion on the purpose of the pipes, was to power a hoist, lifting loaded wagons from workings on Whitesike Level (the G. Limestone dips below Caplecleugh at this point) up to Caplecleugh, for tramming out to the main dressing plant at Nenthead (V.M. era?).