Year Listed: 2011
Spanning the Puyallup River in Pierce County as part of State Route 162, the McMillin Bridge may be the only known concrete through truss structure of its type in the United States. Inspired by Homer Hadley, Washington’s most innovative bridge engineer, the McMillin Bridge is unique, featuring heavy steel-reinforced through trusses strong enough to eliminate the need for overhead lateral sway braces. When completed in the fall of 1935, the resulting bridge was hailed as the longest concrete truss or beam span in the country. Hadley is credited with numerous bridge designs, including the first floating concrete pontoon bridge in the world, now known as the Lacey V. Murrow Bridge over Lake Washington in Seattle. The Washington State Department of Transportation recently announced plans to demolish the McMillin Bridge once a new parallel bridge has been completed and traffic re-routed. Federal regulations require WSDOT to analyze alternatives to demolition. Once this analysis is released, interested parties will have the opportunity to comment. If the bridge is unable to be retrofitted for continued use, the goal will be to retain it for foot and/or bicycle traffic.