Minot, North Dakota first in Great Northern-Soo Line crossing tower looking northeast in July 1981. Photograph by Charles W. Bohi.

Great Northern tower at Minot, North Dakota, June 29, 1982. Soo tower at the rail line crossing, photograph by Harold Hall, from the Norm Keyes Collection.

Great Northern tower at Moorhead Junction, Minnesota, undated. Photograph by Robert Johnston, from the Norm Keyes Collection.

Moorhead, MInnesota Great Northern Moorhead Junction tower in August in 1968. Photograph by Charles W. Bohi.

Great Northern Tower at North Portal (Seattle, Washington), Washington, July 28, 1982. Other subject classes: Structure, Tower

Great Northern Tower at North Portal (Seattle, Washington), Washington, July 28, 1982. Other subject classes: Structure, Tower

Great Northern tower at North Portal, Seattle, Washington, 1982. Photograph by George Werkema.

Great Northern tower at North Portal, Seattle, Washington, 1982. Photograph by George Werkema.

Great Northern tower at North Portal, Seattle, Washington, undated. On the Seattle waterfront - New brick tower built in the mid-to-late 1950's, photograph by Harold Hall, from the Norm Keyes Collection.

Great Northern tower at North Portal, Seattle, Washington, undated. On the Seattle waterfront - New brick tower built in the mid-to-late 1950's