1773: CR-9, Sima
San Miguel 30T 456248 4796341 (Datum: ETRS89. Accuracy code: M) Altitude 385m (390m)
Length 30m Depth 27m
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 shaft top is 4 x 3m. The shaft drops 27m to a floor and a aven off to one side.

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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