Vallée d'Happonvilliers

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Vallée d'Happonvilliers flows into Vallée de Reuse , which it joins at N 48° 18′ 26″, E 1° 8′ 51″ at OSM node n3077076361, and there 45 km of total upstream flows in. load it's distributaries

Vallée d'Happonvilliers has 2 tributaries.

• (unnamed), which joins it at N 48° 19′ 33″, E 1° 6′ 1″ at OSM node n3077089462, and 7 km of total upstream flows in.
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• (unnamed), which joins it at N 48° 18′ 36″, E 1° 8′ 8″ at OSM node n3077101460, and 2 km of total upstream flows in.
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