4699: shaft
San Antonio 30T 446088 4800919 (Datum: ETRS89. Accuracy code: G) Altitude 150m
Length 56m Depth 35m
Area position

Updated 27th September, 12th December 2018

   A large shaft which drops 9m to a boulder floor with strongly draughting rift at the north end (not passable) and a smaller rift at other end that was capped to a p9. Another 4 - 5m drop was reached that also needs capping. Some work has been done here. (Ref: 30b).
    In the summer 2018, more work in "horrible conditions" opened up a narrow and awkward p5 to a final 5x3m chamber with two very small outlets in a rubble floor where water drains away. (A crawl above the p3 may continue; see sketch.)
   Two visits in the autumn, 2018 pursued a couple of possible leads:
   • The end of the passage leading off from head of fourth pitch was examined. The only possibility would require a lot of work to open up the floor to get down into a low, mud-floored area.
   • At the crawl below the 3rd pitch the gritstone boulder choke along the left turn at the T junction was attacked but it has "no encouraging features". At the end, it was clear that the floor slopes up to the roof. However, just before the final 3 or 4m there is a draught blowing along the passage which presumably goes down the slot in the floor. It would take a lot of work to open up this slot.

   Survey data transposed from a Word document (summer 2018) was used to create the 3d file, linked below. Further surveying took place in the autumn before the cave was cleared.

References: anon., 2018b (Easter logbook); anon., 2018c (summer logbook); anon., 2018d (autumn logbook)
Entrance pictures : Easter 2018
Underground picture : Easter 2018
Video : entrance (YouTube)
Detailed survey : sketch of the final chamber and the crawl above the p3
Line Survey :
On area survey :
Survex file : 2018