Canadian Pacific Railway spiral tunnels with a freight train entering the tunnel in Yoho National Park, British Columbia on July 17, 1990. Photo by J.M. Fredrickson. Other Subject Classes: tunnel

A sign explaining the Canadian Pacific Railway spiral tunnels in Yoho National Park, British Columbia in August 1989. Photo by J.M. Fredrickson. Other Subject Classes: tunnel

Canadian Pacific Railway spiral tunnels in Yoho National Park, British Columbia in August 1989. CP Tunnels Photo by J.M. Fredrickson. Other Subject Classes: tunnel

Burlington Northern station at Martin, Washington, circa 1987. Small station building, power lines, east portal of Stampede Tunnel. Photo by J.M. Fredrickson. Other Subject Classes: station, tunnel, power line, mountains

Burlington Northern Railway Cascade Tunnel at Berne, Washington, on August 04, 1987. The east portal of the Cascade Tunnel is shown with associated buildings, signals, and air handlers. The tunnel was completed by the Great Northern Railroad in 1929 and is 7.8 miles long. The photographer is approaching the tunnel on the nose of a locomotive. Photo by J.M. Fredrickson. Other Subject Classes: freight train, tunnel.