Personally as a generalist on this issue, e.g man on the Clapham
omnibus, I'd be be happy as is. But "intermittent=yes" might be a useful
addition as it is often used on streams to describe an analogous situation.
On the other hand, I believe adding additional "specialist" tags to
almost anything is something that properly exploits the full power of
OpenStreetMap to document the physical and observable world and
something to be encouraged. In addition "usage=spillway" is used and
documented, and in my interpretation fits the bill:
https://wiki.openstreetmap.org/wiki/Key:usage - see "Waterways" section
https://wiki.openstreetmap.org/wiki/Tag%3Ausage%3Dspillway
Cheers,
Mike
On 28/07/2025 11:00, Daniel Hatton via Talk-GB wrote:
Way #1388765757 is a culvert running through a road embankment. It
connects a pond on one side of the embankment to a ditch on the other
side. Except most of the time, it doesn't, because the culvert is
located well above the usual level of the water surface in either the
pond or the ditch, so it only really connects them if one or both of
them is in a flood condition. Would tagging the culvert
"usage=spillway" be a good way to express this?
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