0019: Loca 1, Cueva de la
Ozana 30T 454198 4794741 (Datum: ETRS89. Accuracy code: M) Altitude 250m
Length 100m
Area position

Updated 5th November 2003; 21st February 2016

A stream resurgence. A wet crawl reaches a sump after 30m but a bypass can be entered 13m back on the right. The passage eventually becomes too low in water.
During an optical brightener test from site 3884, detectors were placed here from 13th February 2016 and checked over the next few days in rising and falling flood conditions. The results were consistently negative. The optical brightener came through at the Jivero 1 resurgence after 48 hours. (The full details can be found here.)

References: Fernández Gutiérrez et al, 1966 (survey); anon., 1975b (Easter and summer logbooks); Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Cox G, 1973; Manchester University Speleological Society, 1982 (survey); Mills L D J and Waltham A C, 1981 (survey); Corrin J S and Smith P, 1981; anon., 2016a (January, February logbook)
Entrance picture :
Underground picture(s):
Detailed Survey : from 1975: low res  high res
Line Survey :
On area survey : 1975 Ozana area map. Not a lot of detail. low res  high res
Survex file :