We had to ask to visit the roundhouse. The Jupiter and the 119 were inside getting worked on. One of the engineers came by and gave us a close-up look.
After seeing the engines, we drove out to do a short hike to the Big Fill. The crews from the Central Pacific and Union Pacific graded past each other, one making a trestle to the south of the big fill, the other taking longer to complete the big fill. After the rails were completed, the tracks were re-routed from the trestle to the fill.