[Tagging] Ford and other river crossing : (was : waterway=wadi problem)

[johnw]

> 
> I have one last case: some low profile bridge (without parapet) may be submerged after heavy rain but may be still usable if water depth above the bridge in not too high. How to tag this?
> 

I was going to ask this - as most of the fords in Southern California are only made for floodwaters, while the small stream goes under in a culvert - some of those are basically bridges, as the usual flow goes under, and the storm flow goes over.  I Too have seen some “submergible” bridges that become fords in flood times (usually heavily reinforced concrete things). I’d be interested in seeing what happens when bridge, ford and flood_prone combine. 

I wonder if there are enough of them to warrant their own bridge=*, as there are so many kinds of bridges. I bet we can put a ford tag on the bridge - it might be a simple solution. 

Javbw