Before the CPLs, semaphore signals controlled the Washington Branch, this one
labelled E194. I presume E is for eastbound, and 194 represents mile 19,
adjacent to utility post 40. With 40 posts to the mile, this puts the
location near mile 20, and indeed milestone 20
appears to stand in the foreground.
Across from the semaphore is its control box, several of which remain extant
along this stretch. A fence of some sort between the control box and milestone
appears to mark the boundary of neatly maintained ballast.
The hillside cut depicted here is the most significant of the Branch, and is
now overgrown with trees.