He is building and HO scale layout of the Sacramento Valley RR, circa 1856-65. You can watch a conversation between he and I on my YouTube Turntable Discussions.
There will be a series of posts here that will include his layout build such as structure builds and scratch built brass 4-4-0 . CRAZY!
Here is one of the period photos Nick has been investigating to match the map with actual track and structure placement...
This is a Sanborn map which he has referenced for his layout as an overview for his rail road.
The following photos reflect the track work around the turntable.