Hi Tim,

I had the same thought as you when I was looking at the prototype bridge. It's not the only one (now gone) in that part of town that seems very thin to my eyes. It could be my model accentuates the effect because for reasons probably nobody but me cares about I had to lengthen the model bridge about 25% compared to the prototype. The person who designed the prototype bridge -- C. Turner -- was a big shot in the early 20th century in concrete construction techniques. He was pushing a design approach he called the "mushroom system", which I don't know much about.

If you're referring to the understructure of the model, I built it up with Luan, then I added the trolley tracks via handlaid rails to that. I then used Durham's water putty to make the road surface.

Steam Era freight cars run underneath!

Bob Sterner
St. Paul, MN