To cross a stream, road or valley (the place the delay a result of a flight of locks at possibly facet will be unacceptable) the valley can be spanned by a navigable aqueduct – a renowned instance in Wales is definitely the Pontcysyllte Aqueduct (now a UNESCO World Heritage https://canalinfantil95170.blogrelation.com/43496214/the-best-side-of-urso-fofo