0457: Hammered Hole
S Vega 30T 450778 4795124 (Datum: ETRS89. Accuracy code: G) Altitude 330m
Length 43m Depth 25m
Area position

Updated 30th August 1998; 19th February; 17th December 1999; 14th May 2000; 21st January , 10th June 2001; 21st May, 2014

The entrance lies in a small depression with an obvious tree. The draughting head of the pitch is a chiselled and enlarged slot in a limestone face. The 25m drop lands on a rubble slope and the draught is lost.

A number of trips during 1999 enlarged the entrance and bolted across about 6m below the head of the pitch to an ascending calcite slope that ends in a draughting boulder choke in which one block prevents further progress. The choke appears to be immediately under the entrance of Hidden Hole (0458).

References: anon., 1978 (logbook); anon., 1983a (Easter logbook); anon., 1983b (logbook); Corrin J, 1983b; anon., 1998d (logbook); anon., 1998c (Christmas logbook); anon., 1999c (logbook); Corrin Juan, 2000; anon., 2000b (Easter logbook); anon., 2001b (Whit logbook); anon., 2014b (Easter logbook)
Entrance picture : distant  close up   very close up : Easter 2014
Underground picture(s):
Detailed Survey : 1:1000
Line Survey :
On area survey :
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)