Updated 3rd October 2008

This site is described on the web site of the Sociedad Espeleológica Alto Duero who have explored it. It would appear that the entrance has been located with GPS but the altitude (in brackets above) is wrong when plotted on 1:5000 maps.
The entrance has dimensions of 5 x 2m. The entrance pitch drops straight down 28m. At the base a further climb down of 3m chokes. It could be that the entrance has been covered over by the track building in 2007/2008, although this is unlikely given the dimensions of the entrance.

Reference: SEAD website; file; anon., 2008e (summer logbook); Corrin Juan, 2009
Entrance picture: on the SEAD website  possibly (2008)
Underground picture(s):
Detailed survey:  elevation on the SEAD website
Line survey:
On area survey:
Survex file: