2916: shaft
Barrio de los Urros 30T 448407 4800204 (Datum: ETRS89. Accuracy code: A) Altitude 172m
Length 64m Depth 51m
Area position

Updated 15th October 2008; 15th October 2011; 21st October 2013

The site has a powerful draught at times. Exploration and bolting in the summer 2008 were hindered by swarms of flies.
Exploration was extended over 5 days as first "not enough ladders" then "needs bolts" then "not enough rope" played their parts.
After passing through sandstone at the entrance, a 16m pitch drops to a mud slope and rock bridge. The following p5 has a narrow pitch head but quickly opens out, landing on sandstone blocks. A p11 with loose blocks all the way down lands at the head of a further drop (p12) and a passage which quickly chokes. The base of the p12 has a flat bottom and a narrow rift.

The site was collapsed - boulders and soil across the top of the entrance - when visited in the summer, 2011.

Other sites of interest in or around the depression over this end of Torca la Vaca include 3594, 3905, 3906, 3914, 3916, 3924 and 3925.

Reference: anon., 2008c (Easter logbook); anon., 2008e (summer logbook); Corrin Juan, 2009; anon., 2011d (summer logbook)
Entrance pictures: yes
Underground pictures :
Video :
Detailed Survey : pdf file
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.)