L:330
V:53

Ogof Rhaeadr Ddu, Black Waterfall Cave, Waterfall Cave 2


NGR: SO 21283 12560
250 m.asl

Monmouthshire , Northern Outcrop - East (Morlais to Abergavenny)
 map using leaflet map:
Rising Cave
Access Situated in the disused Blackrock Quarry on the minor road which runs along the Northern side of the A465 through the Clydach Gorge. The quarry is to the right of the road going uphill; opposite a pylon, a signed 'footpath' leads to a quarry bench from which a thorny slope can be descended reach the lower N face, where a small stream issues from the entrance.
Description A wet and tight cave throughout its length. Two waterfall climbs, and an 8m aven, lead to the final 40m aven to a choke (thought to be near surface).
History BNSSS in 1961. Extended by CCC and CSS in the 1980s. Terminal aven climbed in 1990
Hydrology Water has been noted for its low temperature and its chemistry is said to show long residence time Tests
Conservation SSSI: 0080 Mynydd Llangatwg (Mixed)
Gallery

Martin Laverty
2023
W and N faces of quarry
Brendan Marris
2012
Martin Laverty
2023
Martin Laverty
2023
Survey
Cwmbran CC, 1982
Cwmbran CC, 1985
CSS Records (19), 1992
References
Theo Schuurmans, Keith Jones, Steve Ainley, CwmbranCC Journal 11, pp16-19 (1982)
Theo Schuurmans, Steve Ainley, CwmbranCC Journal 14, pp28-31 (1984) Ogof Rhaeadr Ddu goes: at last
Caves of South Wales, Stratford, T., 1995
A Caver's View of the Clydach River (Cwmbran Caving Club, 1986), Schuurmans, T.
Search for further records Browse registry map
Cambrian Cave Registry entry 827
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