Don't know the answer to your question, but I acquired some 1952 footage of this line in Canada, and found a guy who was a trainmaster for the CPR for info and location. The film shooter rode the train from Medicine Hat to Vancouver via this route. In 1996 I think it was we drove through some of this area and could see the old line in many places. This was the southern line for the CPR and it was spectacular. There is still a little tourist op at Summerland that runs through one of those tunnels mentioned. I hope to have this Canadian Project done for fall 2018 release, but who knows!!!
Greg Scholl