To cross a stream, road or valley (exactly where the hold off a result of a flight of locks at both aspect could be unacceptable) the valley may be spanned by a navigable aqueduct – a famed instance in Wales may be the Pontcysyllte Aqueduct (now a UNESCO Entire https://canal-infantil00987.atualblog.com/43566575/everything-about-urso-fofo