Nice layout with some good locos running on it.
I particularly like the big bridge. I've always wanted to build one but don't have anywhere on my layout for one.
And I love the loco crossing it, too. I've always wanted an M-1, even though I know it was not a very successful locomotive design.
The M-1 was in many ways like the UP Coal Turbine: an attempt to burn coal in a "modern" form (steam instead of gas turbine, but still), really big, and ultimately a failure, even with all the cool engineering. A learning experience, so to speak. But both were awesome locomotives in their own ways.