0459: Cumpleaños, Sima
S Vega 30T 450176 4795275 (Datum: ETRS89. Accuracy code: G) Altitude 274m
Length 190m Depth 33m
Area position

Updated 20th January 2002; 7th October 2010; 22nd September 2018

   A 5m pitch drops onto rubble. The second pitch in a rift can be laddered between boulders or through a tight slot and is a 14m drop into a small chamber. (The boulders above the climber should be removed as the ladder might be removing the support).
At the base, the exit is through a small hole in the left hand wall. This emits a draught through a short series of 1m diameter tubes ending at a sloping 8m pitch into a chamber which is directly under 460. The base of the slope has a possible dig, while up the slope leads to a tight 12m pitch (dropped to a calcite choke) and a well decorated rift about 3m wide, choked both up and down a climb at the end. The draught is lost.

   In 2010, the cave was extended by 74m through a dig at the base of the p8. This leads into the decorated Tolentino Chamber and, after another dig, to Satre's Garden where a loose climb up an aven enters another chamber with a possible dig through to a shaft. A possible dig was also noted below the first 5m pitch: a rift that apparently heads away from the cave.

   There is a probability that sites 999 and 1000 are 460 and 459 respectively (see 2018 summer logbook).

References: anon., 1983b (logbook); Corrin J, 1983b; material in file; anon, 2001d (Christmas log book); Corrin Juan, 2003a; anon., 2010c (summer logbook); Corrin Juan, 2011; anon., 2018c (summer logbook)
Entrance pictures : yes
Underground picture(s): yes
Detailed Survey : 1:500 pre-2010 : 1:500 2010 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.)