3543: cave (Civil War shelter)
Camposdelante 30T 446456 4798193 (Datum: ETRS89. Accuracy code: A) Altitude 140m
Length 106m Depth 21m
Area position

Updated 1st December 2011; 30th April, 11th May, 9th October 2013; 26th September, 4th December 2014; 18th October 2015; 11th February 2016

Note: Opposite the depression is what looks like a lay-by. This in fact a passing place and turning space for the driveway next to the depression. There is only room for one vehicle.

This choked sink against a scar is above a dowsing reaction. A link to the map showing the dowsing activity is found below.
Various gaps between boulders at the sink were noted in November 2011, but nothing obvious to push was seen.

At Easter 2013, expedition cavers were shown a cave, hidden behind dense vegetation, which had been used as a refuge during the Civil War.
Drop down by a tree at the side of the depression for about 2 metres to where a narrow slot can be seen to the right. At the bottom of the slot is a walking size passage to the left which continues for some 16 metres. Opposite the slot, at floor level, is a low crawl leading almost immediately to a roomier passage which spirals down for about 10m. The passage is rather scrappy and confused with several leads which all appear to close down.
A left turn along the walking passage leads to a branch to the right. Ten metres along the branch an excavated hole on the left leads to a 6.5m pitch into a chamber which is a parallel sided rift. The floor consists of jammed boulders. A further descent of 6.5m leads to a continuation of the rift, again on a floor of jammed boulders. A climb straight down in the boulders seems to block after about 8m. To the right a climb down leads to a narrow rift which needs further effort. A climb down and to the left leads to another space which needs further work.
Continuing along the walking passage leads to a third passage to the right which closes down after about 8 metres. There is a sound connection with the rift chamber.

In August, 2013, two sites were dug at the end of the high level passage: the right hand one ended in a boulder-filled passage; the left hand dig needs capping to gain any further progress. A very tight vertical slot at the lower end of the lowest chamber was passed to a wider section but all ways on choked. A small window looking onto a pitch at the highest part of the final chamber was enlarged but the whole right hand side wall of loose boulders above the window started moving, resulting in a "rather speedy exit of the diggers". "The site might warrant a return visit."

In August 2014, capping and digging was carried out in a "low crawl" but more work is needed.

In November 2014, the dig at the end of the high level passage dropped 4m into the roof of the first chamber. An undescended pitch up a slope in the lower chamber could not be found and is probably buried. This was checked again a year later and the "lost pitch" remains lost.

In October 2015, a traverse over the main chamber entered a small (5x2m) chamber with many loose boulders. A side passage dig was inspected and it will be a long term effort.

Reference: anon., 2011d (summer logbook); anon., 2011e (autumn logbook); anon., 2013b (Easter logbook); anon., 2014c (summer logbook); anon., 2014d (autumn logbook); anon., 2015d (autumn logbook)
Entrance picture: yes
Underground pictures : summer 2013
Video :
Detailed Survey : pdf Easter 2013 : pdfs summer 2013 - plan and elevation : Modified plan, autumn 2015
Line Survey :
On area survey : Dowsing reactions close to this dig : Dowsing reactions from Fuente Aguanaz to Cobadal. (Article about the dowsing carried out in July 2011 can be found here.)
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)