My wife has a friend living in Montrose who spent part of her childhood at the Tacoma plant when her father ran it. She tells a story of riding the "pop car" to Durango one day after her father called the station to make sure no trains were northbound. The agent misspoke, and when they got out on the High Line, they heard one coming. They stopped the car and ran back along the track; the train couldn't stop in time, hit the car and sent it to the river below.
Neither that narrow cut or the shelf is where I'd want to be in the face of unexpected rail traffic...