3566: cave
Riaño 30T 450341 4801415 (Datum: ETRS89. Accuracy code: G) Altitude 120m
Length 3m
Area position

Updated 9th October 2013; 12th, 30th May 2018

   A cave with the stream sinking in Fox Cave (site 0936) valley. The low entrance enters 3m of crawling to where it narrows off. This would need engineering. Water can be heard falling beyond. A hole 5m above, on the slope in the woods, drops into a 5m climb down - but this closes off.
   In 2013, the site and the rift above were reinvestigated but "all possible leads close down".
   On 12th May, 2018 OBA was put into the water here and detected with a "clear positive" at site 3282 on the 14th. There was some moderate rain between those two days. A detector in the River RiaƱo near the bridge at 30T 0.449.529 4.801.033 remained negative. A background check was run before before, with both detectors negative. Detectors left in from the 14th to the 19th were also both negative.
   More details and a map can be seen on the hydrology page.

Reference: anon., 2011d (summer logbook); anon., 2013d (summer logbook); anon., 2018b (Easter logbook)
Entrance picture: 2018
Underground pictures :
Video :
Detailed Survey :
Line Survey :
On area survey :
Survex file :