To cross a stream, street or valley (where by the hold off because of a flight of locks at possibly aspect would be unacceptable) the valley is often spanned by a navigable aqueduct – a well known case in point in Wales will be the Pontcysyllte Aqueduct (now a https://canalinfantil31249.blog-a-story.com/18326866/top-guidelines-of-urso-fofo