id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
18815	"""waterway=canal"" + ""tunnel=yes"" is valid !"	verdyp@…	team	"
A canal may be under a tunnel (here at layer -1, below a large railway on the ground level without embankment), like other waterways. See the attached screenshot.

A canal may also be built to pass over a bridge (various examples in France, like Canal du Midi, or elsewhere).

Why does JOSM signal it as ""suspect"" ? What would be suspect and would need to be signaled is only if a canal cross another highway or waterway or railway, at the same layer (the implied layer is 0 if not specified), and without any intersection node appropriately tagged for their crossing (But this is not the case here).

"	defect	closed	normal	21.04	Core validator		fixed	waterway canal tunnel	francois.lacombe