Arroyo Piedras Negras

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Arroyo Piedras Negras flows into Río Matancilla , which it joins at S 31° 32′ 4″, W 70° 7′ 43″ at OSM node n4480386197, and there 91 km of total upstream flows in. load it's distributaries

Arroyo Piedras Negras has 1 tributaries.

• (unnamed), which joins it at S 31° 31′ 59″, W 70° 7′ 20″ at OSM node n4480483845, and 6 km of total upstream flows in.
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