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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.

Eight construction workers who worked with timbers on the construction of the SP&S Columbia River Bridge, circa 1908. This is a postcard image.

Raising the first bent of the traveler used in erecting the SP&S Columbia River Bridge, August 30, 1907. This is a postcard image.

Color postcard view looking through the SP&S Columbia River Bridge to the south, postmarked August 28, 1909. This is a postcard image.

General view looking south of the SP&S Columbia River draw bridge at Vancouver, Washington, April 24, 1908. This is a postcard image.

Color postcard view of steam locomotive powered passenger train passing over the SP&S Columbia River Bridge, postmarked August 1912. This is a postcard image.

Construction workers who moved the bridge erection traveler for the SP&S Coulmbia River Bridge across Shaw Island (now Hayden Island), April 16, 1908. This is a postcard image.