1325: Lammas, Cueva
S Vega 30T 452718 4794661 (Datum: ETRS89. Accuracy code: M) Altitude 405m
Length 131m Depth 77m
Area position

Updated 21st January 2001; 8th October 2007

The entrance lies in an obvious tree-filled depression, just above the track and to the west of the set of concrete electricity poles which mark the start of the route to Cueva Coquisera (039). In 2007, the entrance shakehole had been partly filled with large blocks to form the base for the mobile phone mast.

An excavated hole through boulders at the base of the depression drops 4m into a 16m long chamber with a loose bouldery floor and a calcited inlet. At the right hand side a short climb down leads to the top of the first pitch where the inlet brings water to calcite the boulders together. The 5m pitch lands in a chamber with a short climb down to a pool and an eyehole onto a 3m drop. Below, the water drains into a miserable sump pool but to the right a strong draught blows into an excavated crawl onto a 2m climb down to a ledge followed immediately by a 4m pitch. A couple more short climbs and pitches end at 5m of walking to the sloping rift at the head of a 10m pitch.

The pitch head been excavated and enlarged. In the chamber below there is a good digging possibility with an echo and draught. Below the pitch head there is a step across the drop to another draughting passage which is small.

The digging possibility was excavated to another 11m pitch to a tight rift which was pushed 70m with an awkward climb and tight squeeze. Beyond, a 20m pitch dropped to the route became too tight on a sandstone bed. Another 5m pitch became too tight.

Link to entry in the Cave Diving Sump Index.

Reference: anon., 1998d (logbook); Corrin Juan, 1999; anon., 1999c (logbook); Corrin Juan, 2000; anon., 2007d (summer logbook); Corrin Juan, 2007a
Entrance picture: yes  climb top
Underground picture(s): entrance chamber  eyehole  below eyehole  5m pitch  passage above p10  top of p10
Detailed survey:
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.)