Updated 9th November 2003; 15th September 2013; 29th November 2016; 21st September 2018; 3rd April 2021; 14th November 2022

The site is currently out of the Matienzo Caves Project permit area.
   A small entrance at the head of a narrow rift. The ladder can be threaded through to other sections of the rift but all ways close down. Originally marked PD19, the site draughts inwards at the bottom.
   Re-explored by French cavers in 2018, the following description has been Google Tranlate'd from the French:
   A discrete entrance leads to a 35 m pitch established over a long fissure of 8 to 12 m for a width varying between 0.7 m and 1.2 m. Blocks, earthy fill and "concreted castings" dot the vertical.
   At the bottom, the two ends (-38 and -36) leave no hope of continuation and the current of sucking air (summer), sometimes felt to the entrance, is not found.
The chasm opens into the limestone formations of Linares. It is connected either to the Campas fuente (no. 2400, MCP 4811), 600 m to the west, or to the Comellante fuente system in the Matienzo depression in the northeast.
  A reconstructed Survex line (April 2021) gave a more realistic length of 65m (from 34m).

References: anon., 1980a (logbook); Corrin J et al, 1981b (survey); Corrin J, 1980; Corrin J S and Smith P, 1981; anon., 2013d (summer logbook); anon., 2016d (autumn logbook); Simonnot G, 2018; anon., 2018d (autumn logbook); Simonnot G, 2022
Entrance picture : autumn 2016
Underground picture(s):
Detailed Survey : from 1980 : from 2018
Line Survey :
On area survey :
Survex file : Reconstructed April 2021 (Reconstruction notes)