Олланджа

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Олланджа flows into Ульбея , which it joins at N 61° 31′ 50″, E 143° 48′ 47″ at OSM node n2854025586, and there 527 km of total upstream flows in. load it's distributaries

Олланджа has 2 tributaries.

• Наина, which joins it at N 61° 37′ 14″, E 144° 8′ 55″ at OSM node n2854025698, and 40 km of total upstream flows in.
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• Вагай, which joins it at N 61° 39′ 43″, E 144° 18′ 14″ at OSM node n2585948018, and 20 km of total upstream flows in.
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