Riveting the draw span of the SP&S Columbia River Bridge at Vancouver, Washington, October 21, 1906. This is a postcard image.

Placing main pinion shafts on the draw span of the SP&S Columbia River Bridge, Vancouver, Washington, October 25, 1907. This is a postcard image.

Erecting the draw span on the SP&S Columbia River Bridge at Vancouver, Washington, October 25, 1907. This is a postcard image.

Erection of the draw span on the SP&S Columbia River Bridge at Vancouver, Washington, October 25, 1907. This is a postcard image.

Erecting the draw span on the SP&S Columbia River Bridge at Vancouver, Washington, October 4, 1907. This is a postcard image.

A view looking south through the SP&S Columbia River Bridge, postmarked September 2, 1927. This is a postcard image.

Color postcard view of north end of the SP&S Columbia River Bridge, postmarked September 3, 1912. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge, undated. This is a postcard image.

Color postcard view of the north end of the SP&S Columbia River Bridge, undated. This is a postcard image.

Color postcard view of the SP&S Columbia River Bridge with a northbound passenger train, undated. This is a postcard image.