Burlington Northern special train at Woodland, Washington, on October 07, 1976. Burlington Northern locomotive 6597 leads a train with girders for a bridge in Rulo, Missouri. The girders were carried by drop end gondolas and idler flat cars to protect each end. Photo by J.M. Fredrickson. Other Subject Classes: special train, diesel locomotive.

Eastbound loaded coal X200 at Valley City, North Dakota on March 14, 1981. Unit train with WISX gondolas, owned by Wisconsin Power and Light. Photo by Al Christianson.

Westbound piggyback freight Number 23 crossing the Sheyenne River at Luverne, North Dakota on February 18, 1981. Four Sea-Land containers loaded on the two Trailer Train flatcars ahead of the Burlinton Northern caboose. Photo by Al Christianson.

Eastbound freight Number 80 crossing the Gassman Coulee bridge near Minot, North Dakota on February 19, 1981. Four Burlington Northern cabooses on the rear, following a mix of mainly 20 foot international containers on Trailer Train flatcars. Photo by Al Christianson.

Burlington Northern westbound empty coal train with Burlington Northern hopper cars on the trestle over the Sheyenne River in Valley City, North Dakota on February 20, 1981. Photo by Al Christianson.

Burlington Northern Westbound grain train crossing the Gassman Coulee trestle in Minot, North Dakota on February 19, 1981. Photo by Al Christainson

Burlington Northern Westbound grain train crossing the Gassman Coulee trestle in Minot, North Dakota on February 19, 1981. Photo by Al Christainson

Burlington Northern westbound intermodal train Number 23 crossing the Stone Arch Bridge over the Mississippi River at Saint Anthony Falls in Minniapolis, Minnesota on October 14, 1980. Photo by AL Christianson

Butte, Anaconda and Pacific Railroad wood box car 94 at Butte, Montana in 1964. Photograph by Alden Raney. Other subject classes: Car-Box Wood.

Butte, Anaconda and Pacific Railroad flat car and other cars and electric locomotives at Butte, Montana in 1964. Photograph by Alden Raney. Other subject classes: Car-Flat.