Updated 20th February 1999; 17th September 2000; 2nd November 2002; 5th October 2006; 27th October 2007; 18th September 2013; 1st May 2024

A short account of the blocked site has been published in a CDG Newsletter (1996?).

The water supply resurgence before the equestrian centre on the way to Solórzano, just before the turn off to Fresnedo. This area, to the north of Riaño, has some potential. Sandstone beds to the NW have diggable holes. The site is an arch, 3m wide by 1m high with a clear stream emerging. The entrance was full of blocks which have been shifted and there appears to be no problem with the water supply pipe. The dive descends to 4m at the entrance and then a further 3m over the next 60m. The passage is comfortable diving and appears to enlarge ahead.

This was squeezed up through in 2002, beyond the end of Rupert Skorupka's line, to a larger chamber which closed in and became awkward. This extension has not been surveyed, is not included on the quoted length and not shown on the survey.

It has been suggested that site 3910 is possibly a window onto water that may flow to this resurgence.

A visit in mid-April 2024 found that the resurgence had collapsed with no dive line and the water pipe destroyed. A path was dug out through the boulders, finally finding the line laid in 2002. Visibility was poor, but the diver tied on to the end of the line and tried to look for a way on deeper. The way on looked like a boulder collapse and a couple of the larger openings were tried. The dive needs clearer vis to look for a way through the boulders and the entrance needs digging out as it looks pretty unstable. [Mark Smith]

Link to entry in the Cave Diving Sump Index.

Reference: anon., 1996a (Easter logbook); Skorupka R, 1996a; pers comm. November 98; Corrin Juan, 1999; anon., 2000c (Summer logbook); anon., 2002b (summer logbook); Corrin Juan, 2003b; Corrin Juan, 2007; Corrin Juan and Smith Peter, 2007; ; anon., 2013d (summer logbook); anon., 2024b (Easter logbook)
Entrance picture :
Underground picture(s):
Detailed Survey : 1:500
Line Survey :
On area survey :
Survex file :