"1913 - The Canadian National Railway hewed it's way through the Rockies and the treacherous Fraser Canyon. While blasting for the passage of the railway, a rock slide was triggered which partially blocked the Fraser River at Hell's Gate. A dramatic drop in the salmon run resulted.
Thirty years of work by dedicated scientists and several years' construction were required to repair man's damage. Today Hell's Gate fishways, built by a joint Canadian - United States Commission and completed in 1966, stand as monument to man's dedication and ingenuity."