A view looking south from Vancouver, Washington during erecting of the SP&S Columbia River Bridge, October 10, 1906. This is a postcard image.

Side view of the draw span of the SP&S Columbia River Bridge at Vancouver, Washington, November 7, 1907. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge looking south with a northbound passenger train, postmarked November 19, 1917. This is a postcard image.

Power riveter at work on the SP&S Columbia River Bridge at Vancouver, Washington, November 19, 1907. This is a postcard image.

Power riveter at work on the SP&S Columbia River Bridge at Vancouver, Washington, November 19, 1907. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge looking south with a northbound passenger train, postmarked November 1, 1912. This is a postcard image.

Eighty foot deck plate girders to be used on the SP&S Columbia River Bridge, May 3, 1907. This is a postcard image.

Color postcard panorama view of the SP&S Columbia River Bridge, May 18, 1909. This is a folding postcard image.

A view of the north end of the SP&S Columbia River Bridge, postmarked July 13, 1912. This is a postcard image.

First locomotive on the SP&S Columbia River Bridge, January 9, 1908.