Nant yr Helfa

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Nant yr Helfa flows into Afon Tryweryn , which it joins at N 52° 56′ 35″, W 3° 44′ 15″ at OSM node n29781680, and there 62 km of total upstream flows in. load it's distributaries

Nant yr Helfa has 1 tributaries.

• (unnamed), which joins it at N 52° 56′ 39″, W 3° 44′ 29″ at OSM node n3775318547, and 2 km of total upstream flows in.
load it's tributaries