Истопная

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Истопная flows into Лантюг , which it joins at N 59° 39′ 19″, E 44° 42′ 46″ at OSM node n3103914530, and there 113 km of total upstream flows in. load it's distributaries

Истопная has 2 tributaries.

• Малая Истопная, which joins it at N 59° 39′ 15″, E 44° 43′ 31″ at OSM node n3103914408, and 13 km of total upstream flows in.
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• (unnamed), which joins it at N 59° 39′ 23″, E 44° 43′ 52″ at OSM node n3103914546, and 7 km of total upstream flows in.
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