4247: Tilana, Torca (2134 (French: SCD))
Alisas 30T 447050 4793404 (Datum: ETRS89. Accuracy code: G) Altitude 530m
Length 110m Depth 59m
Area position

Updated 30th November 2016; 24th September 2018

   This large shaft is out of the current permit area and has been explored by the SCD. The following description is an amended Google translation of the French description in Simonnot Guy et al, 2016.
    The entrance to the shaft (6 x 4 m) takes a small stream coming from a higher sandstone level. It opens on a pitch of 28 m which pierces the roof of a beautiful chamber (40 x 30 m) occupied by a steep slope covered with debris, bones and bags of dubious content. The immediate proximity of the road just above the orifice obviously facilitates this pollution which has assumed a rather exceptional extent in the sector (?). The view at the top of the pitch is frightening and when it is accompanied by a decaying carrion odour, it simply becomes unbearable.
    The descent takes place along the southern wall, that is to say opposite the creek. This allows us to see the alternation of strata, first limestone-sandstone then sandstone for the last 7 meters. On the opposite wall, this impermeable level is also evidenced by a tributary which falls about twenty meters below the bottom of the chamber. To reach the latter, the temporary bed of a stream coming from a small rapidly impenetrable duct (Upstream Gallery) is followed.
It winds between the scree and the detritus which becomes rarer. Then, towards -45 m, at the bottom of a big collapse, it leads to an air vent (?) followed by a beautiful stooping gallery which very quickly finishes on a thick fill (-59 m).
   The abyss has been known for a long time by the inhabitants of the valley. The cavers of the Tortosa club have descended the shaft (ECT marking with acetylene at the bottom of the pitch) but without actually mentioning it in their bibliography. The SC Dijon revisited it and and surveyed the hole on 14 May 2016 (P. and S. Degouve, G. Simonnot).

References: anon., 2015d (autumn logbook); Simonnot G, 2016; Simonnot Guy et al, 2016; Simonnot G, 2018
Entrance pictures :
Underground pictures :
Video :
Detailed survey : in Simonnot Guy et al, 2016
Line Survey :
On area survey :
Survex file :

X