(unnamed)

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(unnamed) flows into Afon Groes , which it joins at N 52° 13′ 36″, W 3° 52′ 34″ at OSM node n9683710994, and there 13 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Groes Fechan, which joins it at N 52° 13′ 42″, W 3° 52′ 17″ at OSM node n9683711015, and 3 km of total upstream flows in.
load it's tributaries