Updated 6th November 2003; 14th June 2008

Passage to the right of the entrance chimney leads to a drop into walking sized passage and then to a passage of pools and mud banks. A short swim leads to a narrow canal with deep water and a sump.

The other direction from the entrance involves crawls and squeezes to a chamber.

In the spring of 2008, the entrance shakehole was used as a dumping ground for soil and building waste from Arredondo. The entrance was covered over before any action could be taken to stop the work. The site is part of the Cantabrian government protection area around Risco and the dumping should not have happened. It has now been halted with the shakehole partially filled in.

References: Fernández Gutiérrez et al, 1966 (survey); anon., 1975b (Easter and summer logbooks); Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Manchester University Speleological Society, 1982 (survey); Mills L D J and Waltham A C, 1981 (survey); Corrin J S and Smith P, 1981; anon., 2008d (Whit logbook); Corrin Juan, 2009
Entrance picture : partially filled shakehole
Underground picture(s):
Detailed Survey :
Line Survey : from 1965, with Tali I  low res  high res
On area survey : 1975 Ozana area map. Not a lot of detail. low res  high res
Survex file :