Костянка

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Костянка flows into Ушна , which it joins at N 55° 47′ 23″, E 41° 25′ 29″ at OSM node n1319022462, and there 222 km of total upstream flows in. load it's distributaries

Костянка has 2 tributaries.

• Марса, which joins it at N 55° 48′ 9″, E 41° 23′ 46″ at OSM node n1319021633, and 23 km of total upstream flows in.
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• Соница, which joins it at N 55° 48′ 0″, E 41° 22′ 59″ at OSM node n1319020227, and 7 km of total upstream flows in.
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