I've come across the desire to map a stormwater outlet at the beginning of a stream a few times now and have failed to find an appropriate tag to place on the node. These outlets are pretty common in residential areas where the stormwater pipes underneath the roads (obviously unmapped) direct their water to the lower streets and eventually enter naturally forming creeks that existed before the residential estate was even built.
Is there something that is already commonly used that I've been unable to find? I've seen manhole=drain on the wiki, but that is the opposite end where surface water enters the stormwater system. Jono
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