0239: Peter Plummet
San Miguel 30T 457878 4796291 (Datum: ETRS89. Accuracy code: M) Altitude 54m
Length 119m Depth 83m+
Area position

Updated 19th February 1999; 16th October 2003; 1st February, 15th May 2006

A short cave ends at a boulder slope into deep water. The sump has been dived to a rift with a sideways swim down into a half moon passage descending at 30 degrees. At a depth of 35m a lip is met and the passage plummets.

During Whit 95, Rupert Skorupka descended 25m down the shaft, in clear visibility to about sea level. The shaft was continuing down at another 20m with no sign of the bottom.

In October 1995, an attempt using helium in larger bottles was thwarted at the constriction.

At Whit 1996, Rupert returned and descended to - 74m, about 20m below sea level, stopping just below a large, precariously balanced flake. The shaft could be seen to continue down, narrow and very spiky with no bottom in sight. Reference DH has the full account of this dive. A CDG Newsletter has the technical details.

In June 2003, further work was carried out by Rupert. A definite floor was reached at -81m on a slope of silty boulders. Continuing downwards led into a gallery of modest proportions with a snaggy boulder floor. About 20m of line was laid to -83m due to difficulties of manoevring with side mounted 20l cylinders in poor visability. The cave is definitely continuing downwards.

A video shows that the Grupo de Exploraciones Subterraneas de Estepona have been working here (in sifones próximos to a depth of -15m) and at Nacimiento del Río Clarín (115).

Link to entry in the Cave Diving Sump Index.

References: Kendal Caving Club and Manchester University Speleological Society, 1975; Corrin J S and Smith P, 1981; anon., 1981a (logbook); Corrin J et al, 1981a; Corrin J, 1983c; card/material in file; anon., 1995b (Whit logbook); Corrin Juan, 1995a (survey); Corrin Juan, 1996 (survey); Skorupka R, 1996b (survey and photo); Skorupka R, 1996a; Corrin Juan, 1997a; Corrin Juan, 1997b; pers comm (Skorupka R), 2003; Corrin Juan, 2005; anon., 2006b (Easter logbook)
Entrance picture : yes
Underground picture(s):
Detailed Survey : 1:500
Line Survey :
On area survey :
Survex file :