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The Bridges of King County Through the Lens of T. P. Blum: 1931 - 1934

Concrete Arch

Although concrete was used by the Ancient Romans, it wasn’t until late in the 19th Century when the technology of reinforcing it with steel helped concrete become a dominant material for bridge construction in the United States. Midwestern bridge engineers James Marsh and Daniel Luten profoundly influenced bridge design with their arched concrete structures in the early 20th Century. The Boise Creek Bridge, pictured below, is a Luten Arch bridge.


Kanaskat Bridge, Cumberland-Kanaskat Rd at Kanaskat: Green River, July 5, 1932. (Series 474, Bridge Number 3036. Section 30, Township 20N, Range 7E.)

O’Brien West Valley Road between Kent and Orillia, June 23. 1932 (Series 474, Bridge Number 1851A. Section 2, Township 22N, Range 4E.)


Boise Creek Bridge, 2 miles S of Enumclaw: Boise Creek, June 24, 1932. (Series 474, Bridge Number 1060A. Section 24, Township 20N, Range 6E.)

TTY Relay 711

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