Updated 29th January 2010; 18th February, 19th May 2011; 16th May 2012; 24th May 2014
A road-side hole that was revealed by the roads works to improve the Fuente las Varas to San Miguel de Aras stretch. The entrances have chains across.
Two holes right by the side of the road have yet to be capped (February 2011). The right hand hole is dangerous; the left hand one has been descended. Both holes lead directly to the main pitch.
On the December 26th 2009 survey trip, the top of the drop was laddered and the remaining p27 descended using rope. At the base there are lots of mud and small rocks probably from the road works as the hole was opened up. A drop at the west end into a rift has a very small continuation, with no apparent draught.
A climb up some 8m reaches a rift to a parallel small shaft, less than 1m wide at the top. This has been bolted to give a hang in the widest part. A 13m pitch widens out after 4m landing on boulder slope. An apparent passage closes down after a few meters to a very narrow continuation both down and along. The rift is high (10m plus) but does not seem much wider above, but this was not fully checked out but could be looked at from the top of the 13m pitch. Again the draught seemed to be lost.
The site needs looking at in better draught conditions and if possible with people in Biggo. (Description from Phil Papard).
The shaft is quite close to the east end of Backdraught Passage in Cueva Llueva (survey) and the base of the p13 is apparently at the level of this passage. A trip into the hole at Easter 2014 did not identify any possible digging sites. (Not in logbook).
References: anon., 2009d (autumn logbook); anon., 2009e (Christmas logbook); anon., 2011b (Easter logbook)
Entrance pictures: yes
Underground pictures : yes
Detailed Survey : sketch from first descent Disto X drawings: plan and elevation
Line Survey :
On area survey :
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)
with Cueva Llueva (Dec 2009) (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)