The roof of the principle cavern is about twelve metres under Hunter Street, even though its floor is about thirty metres deep. The alignment of the key cavern and tunnels follows as intently as possible that of Hunter Road previously mentioned in order to avoid Business skyscrapers’ deep basements. . https://sydney-cbd-chauffeur75285.mybjjblog.com/the-smart-trick-of-sydney-cbd-chauffeur-that-no-one-is-discussing-39805882