Burlington Northern NW5 Number 995 and NW5 Number 993 with a variety of covered hoppers cross a small trestle near Wyndmere, North Dakota on March 11, 1981. Photo by Al Christianson.

Burlington Northern GP5 Number 1355, former Great Northern Number 905; F7B Number 717, former Northern Pacific Number 6009B; F7B Number 645, former Great Northern Number 314B; F7A number unknown; with freight in Fergus Falls, Minnesota on September 20, 1980. Photo by Al Christianson.

Burlington Northern eastbound 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 eastbound coal train X200 with Wisconsin Power and Light hopper cars and caboose on the trestle over the Sheyenne River in Valley City, North Dakota on March 14, 1981. Photo by Al Christianson

Burlington Northern Green River Bridge east of Auburn, Washington, on December 01, 1973. This Former Northern Pacific bridge is on the 1st subdivision of the Tacoma division. Photo by GJ Werkema. Subject Classes: bridge, Green River

Burlington Northern highway overpass at Kiona, Washington, on June 26, 1986. This former Northern Pacific structure is in their 3rd subdivision of the Idaho division. Photo by GJ Werkema. Subject Classes: bridge, highway overpass

Burlington Northern Railroad bridge at Maple Valley, Washington in August 1973. Former Pacific Coast Railroad Cedar River trestle being demolished, woman and children observing. Other Subject Classes: railroad bridges.

Burlington Northern Railroad bridge at Maple Valley, Washington in August 1973. Former Pacific Coast Railroad Cedar River trestle being demolished. Other Subject Classes: railroad bridges.

On August 8, 1989 work began on a 72 hour replacement of the swing bridge 5.1, the Willamette River Bridge, with a new lift bridge. The work was completed on August 11, 1989. Photograph by Alden Raney. Other subject classes: Bridge-Swing.

On August 8, 1989 work began on a 72 hour replacement of the swing bridge 5.1, the Willamette River Bridge, with a new lift bridge. The work was completed on August 11, 1989. Photograph by Alden Raney. Other subject classes: Bridge-Swing.