Tresviso Caves Project

Tresviso Caves Project Gazetter
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T48: La Torca Grande
Area:Sierra del a Corta
East, North:361376, 4787804 (nearby)
Coordinate Quality:GPS
Long, Lat:-4.7071063560947, 43.230268543336 (map)
Elevation (m):1421
Length (m):73
Depth (m):-37
System:
Active Lead:
Survey Available:

Approach
Follow the Valle de Valdediezmo from the Sobra Valley , about 30m to the grassy bowl beneath a group of cabanas. From here climb up on to the Sierra de la Corta, and walk in a NE direction, descending the irregular ridge towards Sobra. The Torca comes into view on the left hand side, after walking along the ridge for about 15 minutes 2019 From crossroads, follow track South to the white house, drop off of track toward the old 70's camp in the basin. At top end of the basin, climb SE onto the horizon. Follow the ridge NE direction between spot heights of 1507 and 1465, ,there is a noticeable size white rock to walk past ,follow the valley east into the West end of the shake hole, The shaft is best descending from the north side 361420 4787812.

Entrance
A shaft unmistakeable by it's size, 40m by 20m.

Description
The shaft is large and impressive, about 40m across at the top and about 25m deep. The floor is a snow plug. However, at the northern end of the shaft is a pitch of 5m do a further 10m pitch, followed by a pitch of 18m to the snow plug. The snow can be descended into debris filled passage and further to a blind aven
A hole on the south side of the main shaft can be accessed via a 20m slope, belayed from a tree to a 20m drop to a further 15m shaft, 2m in diameter which is blocked at the bottom.
A ledge on the western side of the shaft gives access to two holes leading to a parallel shaft which joins with the main one at the bottom. On the eastern side of the shaft within 10m of the edge are several small shafts and entrances none of which go more than 10m without choking.

Reference
L.U.S.S. (1974-1977)
S.W.C.C. (2010)
T.C.P. (2019, 2024)

Images
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