4772: Sima Grande de Las Calzadillas, La
Las Calzadillas 30T 447404 4795092 (Datum: ETRS89. Accuracy code: G) Altitude 492m
Length 98m Depth 39m
Area position

Updated 27th May 2019; 10th February 2020

   A p25 in a 20m long shaft chokes.

   Further exploration was carried out in the autumn of 2018 when a chimney in one corner was descended to a parallel shaft that was opened up after several hours work then descended 4m to a draughting constriction. Work continued in May and June 2019 when the constriction was eventually opened up allowing a p20 to de dropped to a small chamber with the draught coming from a rock-choked rift under one wall.

References: anon., 2018b (Easter logbook); anon., 2019b (Easter logbook); anon., 2020a (January, February logbook)
Entrance pictures : April & autumn 2018 :
Underground pictures : Spring 2019 : autumn 2019
Video : Exploration, Easter 2018 (YouTube)
Detailed survey : plan, January 2020
Line Survey :
On area survey :
Survex file : January 2020