Northern Pacific steam locomotive 5011 at Mandan, North Dakota, on September 14, 1946. Number 5011 is a class Z-5 built by Baldwin in 1930. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 645 at Mandan, North Dakota, on June 07, 1916. Number 645 is a class C-23 built by Rogers in 1883. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo