Updated 6th May 2002; 26th April 2012
A 2m high, 1.2m wide hole enters a walking phreatic tube for 10m to a mud choke. In the opposite direction, back through the entrance boulders is the same size passage but with mud-filled crawling space over the top, ending in a mud choke.
The site, at Easter 2012, was described as a "crawl in 1.5m wide with cool air coming out". This may not be site 1623; the photos below may also be of a different site.
The pre-GPS grid reference and notes read "VN53259853 (On the sketch survey GR is VN5325098625 - without GPS) Altitude 238m"
Reference: anon., 2001a (Easter logbook); pers comm; Corrin
Juan, 2003a; anon., 2012b (Easter logbook)
Entrance picture: yes
Detailed survey: sketch survey
On area survey: