Bair Road Bridge Pony truss bridge over Redwood Creek on Bair Road Open to traffic Built 1951; rehabilitated 1967
Bald Hills Road Bridge Deck truss bridge over Klamath River on Bald Hills Road Open to traffic Built 1959; rehabilitated 1965
Bertas Road Bridge Covered bridge over Elk River on Bertas Road in Pine Hills Open to traffic Built 1936; rehabilitated 1972
Bluff Creek Bridge Steel arch bridge over Bluff Creek on CA 96 Open to traffic Built 1967
Briceland Road Bridge Concrete arch bridge over Redwood Creek on Briceland Road Open to traffic Built 1935
Brookwood Drive Bridge Covered bridge over Jacoby Creek on Brookwood Drive in Arcata Open to traffic Built 1967
Butler Valley Road Bridge Concrete arch bridge over Mad River on Butler Valley Road Open to traffic Built 1937; rehabilitated 1965
Butler Valley Road Bridge Concrete arch bridge over Maple Creek on Butler Valley Road Open to traffic Built 1929
Chezem Road Bridge Through truss bridge over Redwood Creek on Chezem Road in Willow Creek Open to traffic Built 1916; rehabilitated 1947
Eel River Bridge Through truss bridge over Eel River & NWP Railroad on CA 283 in Rio Dell Open to traffic Built 1941
Eel River Bridge Through truss bridge over Eel River on US 101 in Rio Dell Open to traffic Built 1941; rehabilitated 1989
Eel River Bridge Concrete arch bridge over Eel River on CA 211 Open to traffic Built 1911; rehabilitated 1918
Eureka Slough Bridge Pony truss bridge over Eureka Slough on US 101 in Eureka Open to traffic Built 1943; rehabilitated 2001
Fort Seward Road Bridge Through truss bridge over Eel River on Fort Seward Road Open to traffic Built 1958
Honeydew Bridge Through truss bridge over Mattole River on Mattole Road Open to traffic Built 1920
Klamath River Bridge Deck truss bridge over Klamath River on CA 96 Open to traffic Built 1949
Lake Benbow Drive Bridge Concrete arch bridge over East Branch of South Fork Eel River on Lake Benbow Drive Open to traffic Built 1932; rehabilitated 1939
Lindley Road Bridge Suspension bridge over Mattole River on Lindley Road Open to traffic Built 1925
Mad River Bridge Through truss bridge over Mad River on US 101 in McKinleyville Open to traffic Built 1929; rehabilitated 1959
Maple Creek Road Bridge Rainbow arch bridge over North Fork Mad River on Maple Creek Road Open to traffic Built 1928
Maple Creek Road Bridge Concrete arch bridge over Boulder Creek on Maple Creek Road Open to traffic Built 1923
Mattole Road Bridge Deck truss bridge over Mattole River on Mattole Road Open to traffic Built 1958
Mattole Road Bridge Concrete arch bridge over Mattole River on Mattole Road Open to traffic Built 1935
Old Mattole Road Bridge Pony truss bridge over Mcnutt Creek on Old Mattole Road Open to traffic Built 1926
Orleans Bridge Suspension bridge over Klamath River on CA 96 Open to traffic Built 1966
Redwood Drive Bridge Concrete arch bridge over Bear Gulch on Redwood Drive Open to traffic Built 1921
Van Duzen River Bridge Concrete arch bridge over Van Duzen River on CA 36 Unknown status Built 1925
Zanes Road Bridge Covered bridge over Elk River on Zanes Road in Pine Hills Open to traffic Built 1936