Updated 17th July, 31st October 2010; 23rd May 2015

An alternative grid reference is ETRS89 30T 0448400 4800500. A complicated system that appears to be heading straight for Torca la Vaca along a rift.

The entrance is a small, steeply descending, strongly draughting tube with bolts in the rock face at the top. This opens up a short distance down onto the first pitch. Originally descended on ladders, this was re-rigged for SRT in 2010 to avoid the worst of various suspect wedged boulders. At the foot of the pitch, one way leads down p3, p6, p12 and p6. (Description required of these.)
The other way is a short drop (bolt required) leading to a 6m pitch (50m rope required from entrance to foot of this.) At the bottom a squeeze under the left hand wall leads to a loose chamber with various holes in the floor, all descended and becoming too tight at 10 - 15m depth. The final hole has been traversed over to a stal choke. The draught appears to go up an aven (in cold weather) just before the final hole.
Back at the squeeze under the wall, going left leads up a series of crawls and climbs ending at an 9.75m pitch. At the foot of the 6m pitch, a short passage leads to a route on the right - description Pedro? - while climbing up through boulders leads to draughting chokes and a connection to the series of crawls and climbs.

References: anon., 2009c (summer logbook); anon., 2010b (Easter logbook); anon., 2010c (summer logbook); Corrin Juan, 2011
Entrance pictures: yes
Underground pictures : yes (2009 & 2010)
Video :
Detailed Survey : yes (2009 plan & projected section, 2-page pdf) : yes (2010 plan & projected section, 2-page pdf) : yes (2010 modified plan)
Line Survey :
On area survey :
Survex file : yes (Easter 2010) (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)