This GP7L was built for the US Army as number 1821 (builder number 15691) in 1951.  The Alaska Railroad purchased it in 1960 and rebuilt it in 1976 as GP7u number 1810. The Alaska Railroad sold it in 198? to Nevada Industrial Switching (NIS).  In 1999 it was sold to Oregon Pacific Railway who in turn sold it to Samuel Industries.  (Anchorage yard, November 3, 1971)