|December 2012 (38.8757 Degrees, -121.1307 Degrees) Newcastle Underpass|
It was so foggy at the lower elevations this morning that I could barely see the far side of this bridge. I tried to take a photo from the south approach but I couldn't find a way to get there in the fog. This railway constantly goes in and out of tunnels including one with a nice masonry portal just south of the bridge. However, I was unable to find it driving around Newcastle in the fog.
Like the other Union Pacific crossings, the Newcastle Underpass was originally a timber trestle (see photo below). They must have built I-80 where a natural valley already existed between hills.
Based on Chris Graves' comment (see below) I have added the photo above (courtesy of the Central Pacific Railroad Photographic History Museum), which (I hope) is of the correct Newcastle Railway Viaduct.
Placer County, California Bridges: Newcastle Underpass across I-80 by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.