Updated 1st July 2009; 11th February 2016; 24th September 2018; 15th November 2022; 21st September 2023

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) and in Simonnot G, 2016.

In El Regatón valley. This sink of a few meters (gallery 1 X 1) seems to rise 20m lower in a closed doline (SCD2020 / MCP3270). This latter site is a small resurgence yet to be explored. The water is lost again a few tens of meters further down in an impenetrable crack in a coalescent doline. Site 1757 was linked to site 3270 in 2011.

A water trace from here was detected at site 3278 after 5 days on 3/6/2023. (See Water Tracing Summary)

(Simonnot G, 2018 has a much shorter description)

Reference: Degouve de Nuncques Patrick et Simonnot Guy, 1989; anon., 2009b (Whit logbook); Simonnot G, 2016; Simonnot G, 2018; Simonnot G, 2022; anon., 2023c (summer logbook)
Entrance picture:
Underground picture(s):
Detailed survey:
Line survey:
On area survey:
Survex file: