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

Construction workers on the SP&S Columbia River Bridge, January 31, 1908. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge, postmarked January 2, 1913. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge from the Vancouver end with southbound passenger train on the bridge, January 15, 1914. This is a postcard image.

A view of the concrete mixing plant used during construction of the SP&S Columbia River Bridge, February 22, 1908. This is a postcard image.

A view of the concrete mixing plant used during construction of the SP&S Columbia River Bridge, February 22, 1908. This is a postcard image.

A view of open draw span on the SP&S Columbia River Bridge at Vancouver, Washington, December 1, 1907. This is a postcard image.

A view of the "Mule" on pier Number 1 of the SP&S Columbia River Bridge at Vancouver, Washington, circa 1908. This is a postcard image.

SP&S Columbia River Bridge; 44 ton lift, Vancouver bridge, circa 1908. This is a postcard image.

Construction workers on the SP&S Columbia River Bridge, circa. 1908. This is a postcard image.