Hi all, A discussion has recently started about waterway=fish_pass here : https://wiki.openstreetmap.org/wiki/Talk:Tag:waterway%3Dfish_pass
While writing https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies it was asked to not clutter waterway=* with spillway since it was a specific usage of a man made canal. Such ideas lead to separate waterway nature, usage and sometimes supporting infrastructure to get a tagging model with 3 different corresponding keys. A comprehensive table of waterways natures has been set here : https://wiki.openstreetmap.org/wiki/Key:waterway#Values May it be great to consider usage=fish_pass with waterway=* (canal, presumably) for sake of consistency? Feel free to read and comment on the Talk page All the best François
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