4669: Dron, Torca del
S Vega 30T 452097 4794840 (Datum: ETRS89. Accuracy code: G) Altitude 452m
Length 475m Depth 167m
Area position

Updated 30th May, 26th September 2018

   The entrance has been covered by the farmer with concrete posts which should not be removed. The site is not accessible. (photos here)
Options for continued exploration are, first to investigate the good possibility of opening up a connection through site 4668. This may enter part way down the Dron entrance pitch, where branches and a large boulder are perched and possibly supporting the concrete posts! There is always the possibility of talking with the farmer to make the Dron entrance fully stock-proof and enterable by cavers.


   A branch-covered feature, first spotted by drone, lies about 30m below the Cantones (TV mast) track and pink barn and a few metres east of site 4668. The passages and pitches are particularly muddy causing some difficulty when prusiking. The hole must be re-covered with branches and measures taken to protect the entrance rope (and inquisitive cattle) if cattle are in the field. It may be that more permanent protection is required after consulting the farmers.

T A C K L E   R E Q U I R E D
Ant, Man, Bee 50m rope and 7 hangers
The Lift Shaft: Going Down! 95m rope and 5 hangers (traverse backed up to stal pillar in alcove).
The Service Elevator 65m rope, 5 hangers, 1 long sling and 1 short sling.
Entry to Haberdashery Dept

4 hangers

Haberdashery Pitch 15m rope, 4 hangers and 1 sling.
Entry to His & Hers 1 sling and 4 hangers

   Two bolts, about 3m east of the entrance in some exposed limestone, can be used as a primary belay. The entrance pitch, Ant, Man, Bee, is broken into 3 distinct sections of 12m, 6m and 12m, with big ledges in between. A 50m rope will suffice for the whole pitch. The first section is broken by a rebelay a couple of metres down. Once at the first ledge, a bolt partway down the next section in the opposite wall provides a second rebelay. At the second ledge, there is a bolt above a small hole leading down to the final section of the pitch. A further bolt a couple of metres below provides a free hang down to the bottom of the entrance pitch.
   Leading away from the bottom of the pitch is Snowball Passage, an almost dry streamway leading to the head of a short 5m pitch. To the right of the pitch is a small passage that eventually becomes too narrow. Just back from the pitch, on the left, is another passage that also becomes too small. Water appears at the top of the 5m pitch, which drops into a wider chamber below. An easy wriggle out of the back of this leads to a short 3m pitch down into a blind pot.
   Back at the top of the 5m pitch, a traverse over the top is the main continuation. Up on the right here are some fine snowball-like formations. Continuing the traverse around to the left leads to a short crawl into a stal alcove, followed by a feet-first drop onto a traverse: The Neighbourhood of Infinity. The traverse is at the top of a high rift and the water from the bottom of Snowball Passage can be seen flowing 10m below. At the end of the traverse is an impressive black void and the head of an 80m free-hanging pitch: The Lift Shaft: Going Down! This pitch is rigged from a Y-hang high on the left wall and a 95m rope will suffice for both the traverse and the pitch. A horizontal passage can be seen across the top of the shaft, but is unentered at present. It will be possible to access this by continuing the traverse along the left hand wall.
   The Lift Shaft descends in fine style, and bells out impressively about 10m down, where the Snowball Passage water enters. Abseiling past this point reveals that Snowball Passage is completely suspended in the corner of a much bigger development: the floor and one side of the incoming passage consist of layers of bedrock no thicker than half-a-metre! Below the Snowball Passage ledge are several unentered  passages and features. These will require some acrobatic manoeuvres to gain entry.

   At around 40m down is a very large development level, The Haberdashery Dept., which can be seen to extend in two different directions in 5m wide passages. The Haberdashery Dept. (survey batch 18-03) can be entered by swinging in and lassoing one of several stals. Two bolts in the ceiling can be used to abseil back out into the main shaft where a further two bolts 43m below the Lift Shaft pitch head can be used as an a further rebelay. Subsequent cavers enter The Haberdashery Dept. by abseiling down to the y-hang at -43m, then passing the re-belay upwards to prussik up to the bolts in the ceiling of The Haberdashery Dept. Some thought needs to be given to de-rigging this, because simply reversing the rigging process may be 'exciting'! The safest way will probably be to rig a pull-thru from hangers in the ceiling bolts.
   Once safely in The Haberdashery Dept., the right-hand branch is unentered and will require a traverse rigging to gain access to what is suspected to be a further pitch down to His & Hers (see below). However, the higher Haberdashery level may continue in its own right. The main Haberdashery level continues as a 10m traverse in a wide passage to the head of a 5m pitch down into a large aven chamber, estimated to be about 50m high.  A climb up the opposite wall from the pitch has been pushed, but did not go very far. The main continuation is a crawl under the right wall from the bottom of the pitch head. This leads into a very wide, stooping-height bedding: Soft Furnishings. Various possible ways on close down here, but a passage taking the draught was dug through into a flat-out continuation - The Smithsonian Institute Blues (aka The Big Dig) - to where ten minutes work with a trowel should be enough to break through. This passage is draughting strongly.

   Back in the main shaft, 20m further down is another big development level, His & Hers. (Batch 18-02, stations 18-02.2.1 and 18-02.2.2 are at the entry point, but the series has yet to be fully surveyed.) This can be entered in a similar fashion to The Haberdashery Dept., but much more easily. Once again there is a bolt and a natural belay in the passage which can be used to put in a re-belay lower down in the main shaft. His & Hers drops down to a rift passage with a further, undescended, pitch below. A traverse along the top of the rift to the right requires some protection to proceed. An original explorer got part way along this and thinks that it probably does not continue at the end. Left at the top of the pitch leads to a climb down to a passage that reaches the bottom of an unclimbed pitch up into a "house-sized" passage 10m above. This may be the bottom of the right hand branch of The Haberdashery Dept., but this is far from certain.

   Once more back at the Lift Shaft, the main 80m descent ends at a large chamber, I'm Free! Several possible pitches exit this chamber, all suspected to join up. The main continuation is to the right, opposite the rope, and descends a 50m pitch– The Service Elevator – broken by a large ledge 15m down. This is rigged from a natural belay with a deviation a few metres down, followed by a 35m free hang from a Y-hang in the opposite wall to the ledge. Ten metres down from the ledge is a large, unentered passage. The Service Elevator can be rigged with one 65m rope. At the bottom of The Service Elevator is some impressive flowstone and a small passage leading to a much larger chamber: Ladies' Wear. The water exits via an unpushed, flat-out crawl in the floor. Ladies' Wear is the base of a high aven. A passage – possibly the unentered one seen from The Service Elevator–  is visible above. At the back of the chamber, a degenerating crawl leads to an uninviting, draughtless dig.
(Tackle list and passage descriptions for batches 18-01, 18-02 and 18-03: James Carlisle)

References: anon., 2018b (Easter logbook); anon., 2018c (summer logbook)
Entrance pictures : March 2018 : Cantones aerial photo dated 12/2/2018 (requires Ricoh Theta app) : entrance blocked with concrete posts, August 2018
Underground pictures : March 2018
Video : Entrance, March 2018 (YouTube) : Base of p80 up to ledge (YouTube)
Detailed survey : Easter 2018
Line Survey :
On area survey :
Survex file : April 2018 : South Vega System surveys (after Easter 2018)

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