The third tunnel between St. Paul and Coeburn is Holbrook.  It centers at 36.924873, -82.372080 and is about 1,600′  long.  A trestle begins 11′ or so inside the northwestern portal and extends 625′ over a valley.  It’s dated 1947, but, since the tunnel was blasted out around 1905, we know it’s a replacement for the original timber trestle (and it must have been some trestle!).  There are two more trestles before we get to Coeburn, both high and long.