Coolboy

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Coolboy flows into Derry , which it joins at N 52° 45′ 42″, W 6° 30′ 18″ at OSM node n339564109, and there 75 km of total upstream flows in. load it's distributaries

Coolboy has 4 tributaries.

• (unnamed), which joins it at N 52° 45′ 8″, W 6° 28′ 58″ at OSM node n3316891877, and 5 km of total upstream flows in.
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• (unnamed), which joins it at N 52° 45′ 7″, W 6° 29′ 12″ at OSM node n1494793406, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 52° 45′ 53″, W 6° 27′ 58″ at OSM node n1494793500, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 52° 45′ 21″, W 6° 24′ 34″ at OSM node n1494793452, and 343 m of total upstream flows in.
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