The El Paso & South Western line that ran from Douglas to Benson, Arizona, was sold a few years back by Southern Pacific to a shortline called the San Pedro Southwestern. The SPSW ran an excursion train until 1998, then let the tracks rust until about 2007, when they pulled up about 45 miles of rail from Curtiss to Paul Spur.
A&K tore out the rails, and are still slowly shipping out loads of rail and ties from Curtiss via the SPSW to UP. Freight still runs from Benson to Curtiss with an old GP16 and a an unknown SW-type switcher.
Thanks to John DeLalla for contributing information about this route.