3520: dig
Secadura 30T 456040 4800275 (Datum: ETRS89. Accuracy code: G) Altitude 79m
Area position

A hole above the lowest point of a large depression. It needs the entrance enlarging to get into a crawl.

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