4758: sink
Hornedo 30T 448391 4801894 (Datum: ETRS89. Accuracy code: G) Altitude 119m
Length 18m Depth 8m
Area position

Updated 12th December 2018

   A large stream sink below a 2m sandstone waterfall. The pool drains into a low, tight passage. In drier weather, the outlet was seen to be very small so any work here would take a substantial effort. (Ref: 15A).
   Some work was carried out in September 2018 when water levels were low. The left hand side was dug to form a flat-out crawl under an overhang. A small chamber is reached followed by a descent to another slightly larger chamber then a flat-out squeeze into a chamber about 7m long, 1.5m high and about a metre wide. Holes in the floor can be descended but choke. The cave consists of a series of inverse steps with the other side rubble. It is "not worth the effort of digging".

References: anon., 2018b (Easter logbook); anon., 2018d (autumn logbook)
Entrance pictures : April 2018
Underground pictures :
Video : sinking water, Easter 2018 (YouTube)
Detailed survey : elevation and plan sketches
Line Survey :
On area survey :
Survex file :