Emlenton Bridge

The Emlenton Bridge is a steel-deck truss bridge that spans the Allegheny River just south of the town of Emlenton, Pennsylvania, United States at approximately mile marker 44.4 on I-80. With a height of 270 feet above the river, the Emlenton Bridge was the highest bridge in the Interstate Highway System when completed in 1968 . This record was held until 1971 with the opening of the Fred G. Redmon Bridge near Selah, Washington.

The Emlenton Bridge remains the highest road bridge in Pennsylvania; with an overall span of 1,668 feet it was the largest bridge constructed as part of the Keystone Shortway project. With the completion of the Interstate System, it is likely that the Emlenton Bridge will remain the fifth-highest bridge in the system for a significant time, behind the Glade Creek Bridge in West Virginia, the Pine Valley Creek Bridge in California, the Galena Creek Bridge in Nevada, and the aforementioned Redmon Bridge.

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