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

Great Northern Bridge at Rock Island, Washington, April 4, 1987, over the Columbia River. Other subject classes: Structure, Bridge

Great Northern Bridge at Rock Island, Washington, April 11, 1988, Columbia River bridge. Other subject classes: Structure, Bridge

Great Northern Bridge at Rock Island, Washington, April 11, 1988, Columbia River bridge. Other subject classes: Structure, Bridge

Great Northern bridge at Rock Island, Washington, 1988. Photograph by George Werkema.

Great Northern Bridge at Rock Island, Washington, April 11, 1988, Columbia River bridge. Other subject classes: Structure, Bridge

Great Northern bridge at Rock Island, Washington, 1988. Photograph by George Werkema.

Great Northern Bridge at Rock Island, Washington, April 11, 1988, Columbia River bridge. Other subject classes: Structure, Bridge

Great Northern Bridge at Rock Island, Washington, April 11, 1988, Columbia River bridge. Other subject classes: Structure, Bridge

Great Northern bridge at Rock Island, Washington, 1988. Photograph by George Werkema.