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Washington County
Ash Creek Bridge [Map] Concrete arch bridge over Ash Creek on a S Old Hwy 91Open to trafficBuilt 1925
Virgin River Bridge [Map] Pony truss bridge over Virgin River on S 100 W St in La VerkinClosed to all trafficBuilt 1908
Virgin River Bridge [Map] Lost open-spandrel arch bridge over Virgin River on Sr-9Replaced by new bridgeBuilt in 1934; Replaced 1992
Zion Park Blvd Tunnel Hwy 9 [Map] Tunnel on Hwy 9/Zion Park BlvdOpenConstruction of the 1.1 mile Zion-Mount Carmel Tunnel began in the late 1920's and was completed in 1930. At the time that the tunnel was dedicated, on July 4, 1930, it was the longest tunnel of it's type in the United States.