Updated 11th February 2016; 23rd September 2018; 15th November 2022  

The information has been roughly translated from the French, Spéléo-Club de Dijon reference, Degouve de Nuncques Patrick et Simonnot Guy, 1989 (in Sous le Plancher, no 4, 1989), repeated in Simonnot G, 2016. The grid reference and altitude are likely to have been taken off a 1:25000 map. The French reference number for this site is SCD2003.

Close to the last houses to the northeast of Arredondo, it is the source of a small tributary to the Rio Bustablado first exploration in August 1988. A small tube with a tiny stream soon splits into two: a watery conduit seems to sump and an inactive branch is impenetrable after a few meters.

Reference: Degouve de Nuncques Patrick et Simonnot Guy, 1989; Simonnot G, 2016; Simonnot G, 2018; Simonnot G, 2022
Entrance picture: yes
Underground picture: yes
Detailed survey:
Line survey:
On area survey:
Survex file: