Big Flat Road Bridge Deck truss bridge over Hurdygurdy Creek on Big Flat Road Open to traffic Built 1948
George E. Tryon Bridge Steel arch bridge over South Fork Smith River on South Fork Road Open to traffic Built 1948
Hiouchi Bridge Lost cantilevered through truss bridge over Smith River on US 199 Replaced by new bridge Built 1929; damaged by an oversized truck on March 31, 1989; demolished August 1989
Middle Fork Smith River Bridge Concrete arch bridge over Middle Fork Smith River on US 199 Open to traffic Built 1925; rehabilitated 1972
Myrtle Creek Bridge Concrete arch bridge over Myrtle Creek on US 199 Open to traffic Built 1984
Oregon Mountain Tunnel Tunnel under Oregon Mountain on US 199 Open to traffic Built 1963
Salt Creek Road Bridge Pony truss bridge over Salt Creek on Salt Creek Road in Klamath Open to traffic Built 1975
South Fork Road Bridge Deck truss bridge over Rock Creek on South Fork Road Open to traffic Built 1952