L:[1100]
V:[30]

Waun Fignen Felen Main Sink, Waen Fignen Felin Main Sink, Wiggy Wiggy, Dolphin's Folly


NGR: SN 82565 17667
460 m.asl

Powys , Northern Outcrop - West (Black Mountain)
 map using leaflet map:
Sink Pothole
Access Big sink at foot of rock wall ending a large deep dry valley at the Southern end of the Waen Fignen Felin bog. A substantial locked gate was installed in cemented stonework in 2022
Description Arduous chokes with occasional impressive sections?
History Dug since 1938 (Dragon Group), then mostly SWCC (Clive Jones et al). The site has been dug off and on for a long time, early attempts were made in 1937. The dig was about 30 metres deep in 1967 following a significant team effort by SWCC, but had been completely filled in by 1998. Major extensions 2021-2
Hydrology Fluorescein test in very wet weather by Dai Hunt took 8 hours to DYO resurgence (believed to be via Far North) Tests
Conservation SSSI: 0854 Mynydd Du (Mixed)
Gallery

Martin Laverty
2022
Looking S across blind valley
Brendan Marris
2009
Looking E down sinking stream
Martin Laverty
2022
Secured
Survey
References
British Caver, 3, 1938, p.75
British Caver, 4, 1939, p.69
British Caver, 6, 1940, p.44
British Caver, 18, 1948, p.90
Cullingford, C.H.D. (1951) Exploring Caves,pp.75
SWCC nl.9, pp.6-8, W.H.Little, Ogof Haffes?
Caves and Caving, Summer 1997, p.12
SWCC nl 44, p.14, 1963, in Clive Jones, Digging prospects
SWCC Newsletter 45, 1963, pp.1-3
SWCC Newsletter 51, 1965, p.9. Water tracing carried out in Wales.
Welsh Geological Quarterly, 1(2) pp.39-40, (1965), Clive Jones, In Search of a Cave
SWCC Newsletter 67, 1970, p.16
SWCC 75th Anniversary Publication, Vol.2, pp.200-204, Jem Rowland, Digging the Sink at Waun Fignen Felen (2021)
Descent 288, p11, Above DYO
Search for further records Browse registry map
Cambrian Cave Registry entry 242
 © Caving Wales ⓗ Ogofa Cymru