U.S. Department of Agriculture
of Washington, D.C.
Ouachita River Bridge
(Polk County, Arkansas)Built 1936Concrete rigid frame bridge over Ouachita River on CR 97Open to traffic
Rock Arch Tunnel #1
(Garfield County, Utah)Built 1941Rock Arch Tunnel over SR-12Open to traffic
Rock Arch Tunnel #2
(Garfield County, Utah)Built 1941Tunnel under Sr-12 on Rock Arch TunnelOpen to traffic