Great Northern bridge at Marysville, Washington, 1982. Photograph by George Werkema.

Great Northern bridge at Marysville, Washington, 1982. Photograph by George Werkema.

Great Northern bridge at Marysville, Washington, 1982. Photograph by George Werkema.

Great Northern Bridge at Marysville, Washington, July 29, 1982, over Steamboat Slough. Other subject classes: Structure, Bridge

Great Northern bridge at Marysville, Washington, 1982. Photograph by George Werkema.

Great Northern Bridge at Marysville, Washington, July 29, 1982, over Steamboat Slough. Other subject classes: Structure, Bridge

Great Northern Bridge at Marysville, Washington, July 29, 1982, over Steamboat Slough. Other subject classes: Structure, Bridge

Great Northern Bridge at Marysville, Washington, July 29, 1982, over Steamboat Slough. Other subject classes: Structure, Bridge

Great Northern bridge at Marysville, Washington, 1987. Photograph by George Werkema.

Great Northern Bridge at Marysville, Washington, April 4, 1987, over Ebey Slough. Other subject classes: Structure, Bridge