East Marsh Station Road

Ciénega Bridge is an open-spandrel arch bridge which crosses Ciénega Creek and the Union Pacific Railroad near Vail, Arizona. Originally constructed in 1921, the bridge was part of U.S. Route 80, a major transcontinental highway, from 1926 to 1956. Being the oldest bridge of its kind in Arizona, the Ciénega Bridge is listed on the National Register of Historic Places. The bridge also holds the title of being the longest open-spandrel concrete arch bridge within the state. Currently, the bridge carries Marsh Station Road, which is part of Historic U.S. Route 80 as of 2018.