Jim, I have both of those materials. There's an observation deck overlooking the KY River Gorge that looks just like the one on your layout. Life imitating art? i also took this picture of it. This was built rather later compared to the age of the original bridge (1870). My gorges may be too small for this detail, but it might be fun to add.
Your rocks look very similar to what I'm trying to create. Thanks for input!
