Short answer...no. The active, working parts are off-limits, for obvious reasons, and the lower, older stuff is also owned by the Company, publicly accessible only via their tours..
Not aware of any areas to dive though here anyway, nothing flooded-all working was *above* water-table, unless anyone else knows differently?
If you *do* want somewhere to go swimming in, have you checked out Diffwys, on edge of Blaenau Ffestiniog? There's the adit right by the footpath, incline inside goes immediately to water, not aware of *anyone* having dived here...no idea what's down there Also of interest, as this was where the E floor haulage gear at Cwmorthin was brought from...so must've been significant activity to have required such kit... Just a thought :thumbup:
J
Over-ground, underground, wombling free...