Posted 2 years ago
Selected photo's of the Canadian Pacific Railway, it's Hotels & scenes through Alberta & British Columbia, including Banff & Yoho National Parks.
First image is Cathedral Peak with a CPb passenger train entering a snow shed.
Second image shows the upper spiral tunnel. The Spiral Tunnels were opened on September 1, 1909. They were built to replace what was known as "The Big Hill" on the Canadian Pacific Railway main line it was the most difficult piece of railway track on the Canadian Pacific Railway's route. It was situated in the rugged Canadian Rockies west of the Continental Divide and Kicking Horse Pass.
To reduce the steep grade two tunnels driven in three-quarter circles into the valley walls. The higher tunnel, "number one," runs under Cathedral Mountain, to the south of the original track. The track emerges from this tunnel & has doubled back, running beneath itself and fifty feet lower. It then descends the valley side in almost the opposite direction to its previous course before crossing the Kicking Horse River and entering Mount Ogden to the north. The descent was again about fifty feet. From the exit of this tunnel the line continued down the valley in the original direction, towards Field. The constructions and extra track would effectively double the length of the climb and reduce the ruling gradient to 2.2%.