In 1934, the McMillin Bridge, a reinforced-concrete truss bridge spanning the Puyallup River, opens in Pierce County. Engineer Homer Hadley (1885-1967) of the Portland Cement Association suggested its innovative design. The bridge carries State Route 162 across the river.
The bridge was built during the lean years of the Great Depression after an old steel span was washed out in a 1933 flood. State engineers asked for bids for a replacement bridge and Homer Hadley's reinforced-concrete truss structure, with pier columns of hollow-box construction came in $826 cheaper than the cheapest steel span.
The bridge's main span is 170 feet long and at the time it was the longest reinforced-concrete truss or beam span in the nation.