1769: CR-4, Sima
San Miguel 30T 456358 4796491 (Datum: ETRS89. Accuracy code: M) Altitude 372m (312m)
Length 16m Depth 16m
Area position : Logbook search

This site is described on the web site of the Sociedad Espeleológica Alto Duero who have explored it. It would appear that the entrance has been located with GPS but the altitude (in brackets above) is wrong when plotted on 1:5000 maps.

The 2 x 1m entrance is the top of a 16m pitch. A small aven goes up to one side at the bottom.

Reference: SEAD website; file
Entrance picture: on the SEAD website
Underground picture(s):
Detailed survey:  elevation on the SEAD website
Line survey:
On area survey:
Survex file:

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