From the record
“The Sumpter Valley Railway, Middle Fork Spur, near Bates, Oregon, was built in 1916. Also known as the Oregon Lumber Company Railroad, it was designed by engineer Joseph A.”
Wikipedia article Sumpter Valley Railway, Middle Fork (John Day River) Spur, CC BY-SA 4.0.
One of 9 National Register listings published here for Grant County · listed in 1987 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article