(unnamed)

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(unnamed) flows into Urola ibaia , which it joins at N 43° 1′ 47″, W 2° 20′ 22″ at OSM node n12300106444, and there 23 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Udanako erreka, which joins it at N 43° 1′ 30″, W 2° 21′ 2″ at OSM node n12300106449, and 3 km of total upstream flows in.
load it's tributaries