Not all siphons are not entirely tunnels or culverts: https://www.openstreetmap.org/way/329482560 is a siphon, but it still crosses over, not under, US34 and the Big Thompson River. The purpose of the siphon in this case is reduce the length and height of the bridge necessary to support the aqueduct.
Here is a street level view of the siphon: http://www.gildea.com/albums/BigThompson/IMG_1082.jpg There is an open canal on the top of the canyon on either side which feeds down into the siphon on the left in the photo, and back up on the right. Mike On Thu, Jun 8, 2017 at 9:10 AM, Volker Schmidt <[email protected]> wrote: > @Javbw > how are these tagged? > > On 8 June 2017 at 17:08, John Willis <[email protected]> wrote: > >> >> >> > On Jun 8, 2017, at 10:40 PM, Volker Schmidt <[email protected]> wrote: >> > >> > flat parts of the world >> >> Common on irrigation aqueducts/canals/drains both large and small here in >> Japan, especially when they cross (under) a natural waterway. Without >> connecting to it. >> >> Javbw. >> _______________________________________________ >> Tagging mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/tagging >> > > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > >
_______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
