Середка

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Середка flows into Болотная , which it joins at N 49° 36′ 54″, E 142° 54′ 57″ at OSM node n4469930655, and there 75 km of total upstream flows in. load it's distributaries

Середка has 2 tributaries.

• Тишь, which joins it at N 49° 36′ 41″, E 142° 53′ 53″ at OSM node n4470964734, and 6 km of total upstream flows in.
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• (unnamed), which joins it at N 49° 34′ 30″, E 142° 47′ 30″ at OSM node n4470964152, and 4 km of total upstream flows in.
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