Thanks everyone for help regarding locos and "snoots."
Wow, retirement is great (39 yrs with the Feds). Now I get to do two things I love, read books and play with my trains :-)
Spent some time in British Columbia during the 80's, and enjoyed the trains in the Thompson and Fraser river valleys (as well as many other places). Because of the terrain, everything goes through the valleys. Like (duh!) the rivers, and also the highway, and CP and CN railroads, where one could also see mixed blue and stainless VIA passenger trains pulled by emd F's and alco FP's. It was quite a wonderful show!
Red CP "pacman" and CN Zebras, each on their own side of the river. According to the story, the CP came through first and therefore always had the best side of the river. Some places, the CN obviously really had to work and blast to get a precarious foot hold on the steep river banks.
There is that famous location "Cisco" where the CP and CN swap riversides over two bridges:
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The CP grain trains were memorable. I counted over one hundred round hoppers on one. The red Wheat Board cars were the most prevalent. And the trains had just two locos up front, and periodically through the train there were single, individual helpers ( I think up to three). No helpers on the end, but a yellow caboose. I suppose this was due to the place where they were operating. A twisting road along side the river with no straight snap track :-) all curve sections. Put all your power up front and you'd either break a coupler or pull cars off the rails. Put all you helpers in the back and you would push cars off.
The trains traveled west (down river) and very slowly. Maybe this was why they put so many cars on each train. Riding along the highway, one would see the beginning or end of a train disappearing around a bend. Go 'round the bend, and there's more of the train, disappearing around another bend, and so on, and so on, until you finally get to the other end of the train.
My train won't be quite as ambitious. I've got a nice assortment of the Model Power 52' models, in eight different Canadian color schemes, and yes, most of them are the red Wheat Board scheme. No, they are not as nice as the Intermountain models but they were far less costly and allowed me to get about three dozen (!) This was also back in the eighties, after I returned home from BC. They are smooth runners.
Best Regards and Thanks Again,
Robert