Built a few scratch-built bridges on our old layout in our mountain house back in 2010-13. The bridges may have been the most fun part of construction!
These Trestle bents are my childhood American Flyer pieces.
The elevated bridge is masonite with balsa stringers
Viaduct is about 14' in overall length and was given to me by the designer/builder as a custom piece that I painted and assembled. It really complimented the Hellgate bridge and we were featured on the cover of CTT Oct 2013