Japan–Korea Undersea Tunnel at about ₩100 trillion (approx. US$90 billion), which would produce an extremely low benefit-to-cost result. In 2014, the South Korean Busan Development Institute estimated the undersea tunnel could create ₩54 trillion won (원54T, or US$53 billion) in economic benefits and provide about 45,000 jobs. In an April 2009 editorial, former Justice Ministers Daizō Nozawa of Japan and Kim Ki Chun of South Korea remarked on some of the similarities of the proposed Japan–Korea tunnel to the world's present longest undersea tunnel. The Channel Tunnel runs for 50.45 km linking the United Kingdom and France, and opened in May 1994: At
Canning Tunnel 1940s and constructed in conjunction with the opening of the dam. 110 men were employed in the first year of construction after which the workforce reduced to 60. The tunnel was built at a cost of $3.5 million and was officially opened in 1975 by Hon. D. H. O'Neil MLA the Minister for Works and Housing on Friday 17 January 1975. The Canning Contour Channel was maintained and partially operated for two years after the tunnel's opening as a precautionary measure. Canning Tunnel The Canning Tunnel is a tunnel that originates just west of Canning Dam and runs for approximately