Tag:tunnel=culvert
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Description |
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For a stream/drain/ditch passing under a road. Use it on the section of waterway passing under the road. ![]() |
Rendering in OSM Carto |
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Group: waterways |
Used on these elements |
Useful combination |
Status: de facto |
Tools for this tag |
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A culvert is a device used to channel water. It may be used to allow water to pass underneath a road, railway, or embankment for example. Culverts can be made of many different materials; steel, polyvinyl chloride (PVC) and concrete are the most common. Formerly, construction of stone culverts was common.
Typical culvert is a pipe buried under the road. Very large culverts may be hard to distinguish from bridges. Culverts commonly carry waterway=stream, waterway=drain, and waterway=ditch, but there are also large culverts carrying waterway=river.
tunnel=flooded may be used to map larger and longer tunnels used to channelise any fluid.
How to map
Tag the section of covered waterway, including layer=* as usual for tunnels.
Common values are culvert=pipe if the culvert is made of a single pipe or individual pipe sections and culvert=box if the culvert is rectangular shaped.
culvert=inverted_siphon may be added for sections of a waterway diving under another waterway.
See tunnel=* for a description of the preferred way of connecting culvert waterways to adjoining waterway sections.
Values
Additionally, the following values are in use with waterways:
Possible tagging mistakes
See also
- Culvert on Wikipedia
- Water feature#Navigations
- The discussion page for details of an earlier OSM tagging system, culvert=yes.