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Humboldt County

California
Alder Point Road Bridge   [Map · Street View]
Steel stringer bridge over Eel River and NWP RR tracks on Alderpoint Road
Open to traffic
Built 1972
AMR - Mad River Bridge   [Map]
Abandoned pratt through truss bridge over Mad River on Pipeline (Nee Arcata & Mad River Railroad)
Abandoned
Bair Road Bridge   [Map · Street View]
Pony truss bridge over Redwood Creek on Bair Road
Open to traffic
Built 1950-1951; rehabilitated 1967
Benbow Bridge   [Map · Street View]
Concrete and stone arch bridge over Eel River on Lake Benbow Drive
Open to traffic
Stone road bridge that was built in 1931 as part of the Benbow Inn Resort. Bypassed by a Hwy 101 freeway bridge. Still used but a dead end.
Bertas Road Bridge 05-12-02   [Map · Street View]
Covered bridge over Elk River on Bertas Road in Pine Hills
Open to traffic
Built 1936; rehabilitated 1972
Blue Lake Bridge   [Map · Street View]
Rainbow arch bridge over North Fork Mad River on Maple Creek Road
Open to traffic
Built 1928
Bluff Creek Bridge   [Map · Street View]
Steel arch bridge over Bluff Creek on CA 96
Open to traffic
Built 1966
Briceland Road Bridge   [Map · Street View]
Concrete bridge over Redwood Creek on Briceland Road
Open to traffic
Built 1935
Bridge Creek Bridge   [Map · Street View]
Concrete tee beam bridge over Bridge Creek on State Route 254
Open to traffic
Built 1938
Brookwood Drive Bridge 05-12-08   [Map · Street View]
Covered bridge over Jacoby Creek on Brookwood Drive in Arcata
Open to traffic
Built 1967
Butler Valley Road Bridge   [Map · Street View]
Concrete arch bridge over Mad River on Butler Valley Road
Open to traffic
Built 1937; rehabilitated 1965
Chezem Road Bridge   [Map]
Through truss bridge over Redwood Creek on Chezem Road in Willow Creek
Open to traffic
Built 1916; rehabilitated 1947
Dyerville Bridge   [Map]
Lost Through truss bridge over South Fork Eel River on US 101
Replaced by a new bridge
Dyerville Bridge   [Map]
Lost K-Parker through truss bridge over South Fork Eel River on CA-254
Replaced by a new bridge
Eagle Prairie Bridge   [Map · Street View]
Cantilevered through truss bridge over Eel River & NWP Railroad on CA 283 in Rio Dell
Open to traffic
Built 1941
Eel River Bridge   [Map · Street View]
Through truss bridge over Eel River on US 101 in Rio Dell
Open to traffic
Built 1941; rehabilitated 1989
Elk Creek Bridge   [Map · Street View]
Concrete tee beam bridge over Elk Creek on State Route 254
Open to traffic
Built 1940
Elk River Bridge   [Map · Street View]
Abandoned timber stringer bridge over Elk River
Derelict/abandoned
Ettersburg Road Bridge   [Map]
Concrete open spandrel Arch bridge over Mattole River on Ettersburg Honeydew Road
Open to traffic
Built 1928
Eureka Slough Bridge   [Map · Street View]
Through truss bridge over Eureka Sough on California Route 101
No longer exists
Built 1920
Eureka Slough Bridge   [Map · Street View]
Pratt pony truss bridge over Eureka Slough on US 101 in Eureka
Open to traffic
Built 1943; rehabilitated 2001
Fernbridge   [Map · Street View]
Concrete arch bridge over Eel River on CA 211
Open to traffic
Built 1911; rehabilitated 1918
Fleisher Memorial Bridge   [Map]
Lost Through truss bridge over Eel River on US 101
Replaced by a new bridge
Built 1916. Destroyed by flood in 1964. Spans removed and relocated to Placer County, CA in 1967
Fort Seward Road Bridge   [Map · Street View]
Deck truss bridge over Eel River on Fort Seward Road
Open to traffic
Built 1958
Hammond Bridge   [Map · Street View]
Pennsylvania through truss bridge over Mad River on Rail-Trail
Open to pedestrians only
Relocated from Foss, Oregon to here in 1941; Abandoned 1965 & timber approaches removed; Converted to pipeline bridge 1972; Converted to pedestrian bridge and steel beam approaches added 1983
HN - Hammond Howe Truss Bridge (1905)   [Map]
Lost Howe through truss bridge over Mad River on Humboldt Northern Railway
Replaced by a new bridge
Built 1905; Replaced 1940
Holmes-Larabee Low Water Crossing   [Map · Street View]
Timber stringer bridge over Eel River on Holmes Flat Road
Open to traffic
Built 1937; Acquired by County 1959; rehabilitated 1999; closed by CalTrans; borrowed Bailey Bridge in place 2014; low-water crossing/bridge repair project completed 2016
Honeydew Bridge   [Map · Street View]
Through truss bridge over Mattole River on Mattole Road
Open to traffic
Built 1920
Honeydew Creek Bridge   [Map]
Lost Warren pony truss bridge over Honeydew Creek on Wilder Ridge Road
Replaced by new bridge
Replaced 1980, apparently replaced again in 1990
Hooker Creek Road Underpass   [Map · Street View]
Corrugated multi-plate arch bridge over Hooker Creek Road on Hwy 101
Open to authorized vehicles only
Built 1965
Hoopa Bridge   [Map]
Lost Bridge over Trinity River on CA 96
Replaced by a new bridge
Lady Bird Johnson Grove Pedestrian Bridge   [Map]
Bridge over Bald Hills Road on Pedestrian Trail
Open to pedestrians only
Lindley Road Bridge   [Map]
Suspension bridge over Mattole River on Lindley Road
Open to traffic
Built 1925
Mad River Bridge   [Map · Street View]
Lost Warren through truss bridge over Mad River on US 101 in McKinleyville
Built 1929; rehabilitated 1959; Replaced & demolished 2011
Maple Creek Bridge   [Map · Street View]
Concrete arch bridge over Maple Creek on Butler Valley Road
Open to traffic
Built 1929
Maple Creek Road Bridge   [Map · Street View]
Concrete arch bridge over Boulder Creek on Maple Creek Road
Open to traffic
Built 1923
Marina Road Underpass   [Map · Street View]
Corrugated multi-plate arch bridge over Marina Road on State Route 255
Open to traffic
Built 1979
Martin's Ferry Bridge   [Map · Street View]
Deck truss bridge over Klamath River on Bald Hills Road
Open to traffic
Built 1959; rehabilitated 1965, emergency repairs 2008.
Mattole Road Bridge   [Map · Street View]
Deck truss bridge over Mattole River on Mattole Road
Open to traffic
Built 1958
Mattole Road Bridge   [Map · Street View]
Concrete arch bridge over Mattole River on Mattole Road
Open to traffic
Built 1935 (Forum comment below says 1923)
McCann Ferry   [Map · Street View]
Ferry across Eel River, Middle Fork on McCann Road
Open to traffic
Ferry operates every winter crossing Eel River
McCann Road Bridge   [Map · Street View]
Slab bridge over Eel River on McCann Road
Open to traffic
Built 1965; replacement scheduled for completion 2025
NWP - Cain Rock Bridge   [Map]
Through truss bridge over Eel River on Northwestern Pacific Railroad (NWP)
Closed to all traffic
Built 1913 by the American Bridge Co.
NWP - Dyerville Loop Road Overpass   [Map · Street View]
Abandoned timber stringer bridge over Dyerville Loop Road on Northwestern Pacific Railroad
Abandoned
NWP - Eureka Slough Bridge   [Map · Street View]
Deck plate girder bridge over Eureka Slough on Northwestern Pacific Railroad (NWP)
Open to authorized vehicles only
NWP - Eureka Slough Bridge (1916)   [Map]
Lost Through truss bridge over Eureka Slough on Northwestern Pacific RR
Replaced by a new bridge
Built 1916
NWP - Larabee Creek Bridge   [Map]
Abandoned through truss bridge over Larabee Creek on NWP Railroad
Derelict/abandoned
NWP - Loleta Trestle   [Map · Street View]
Deck plate girder bridge over Loleta creek on Northwestern Pacific Railroad
Closed to all traffic
Built 1930
NWP - Loleta Tunnel   [Map]
Abandoned tunnel on Northwestern Pacific Railroad
Abandoned
Built 1884; Renovated in 1960
NWP - Nanning Creek Trestle   [Map]
Abandoned timber stringer bridge over Nanning Creek on Northwestern Pacific Railroad
Abandoned
NWP - Scotia Bluffs bridge   [Map]
Abandoned timber stringer bridge over Scotia Bluffs/French Gulch on Northwestern Pacific Railroad
Abandoned
NWP - Shively Tunnel   [Map]
Abandoned tunnel under hillside on North Western Pacific
Derelict/abandoned
NWP - South Fork Bridge   [Map]
Pratt and Warren through truss bridge over Eel River on Northwestern Pacific Railroad
Closed to all traffic
Built 1910; 2 northern spans lost during 1964 flood and replaced.
NWP - South Fork Bridge (1910)   [Map]
Lost Pratt through truss bridge over South Fork Eel River on Northwestern Pacific Railroad
Replaced by a new bridge
Built 1910
NWP - Van Duzen River Bridge (1913)   [Map · Street View]
Pratt through truss bridge over Van Duzen River on Eureka Southern Railroad
Closed to all traffic
Built 1913
NWP - Van Duzen River Bridge (Pre 1913)   [Map]
Lost Through truss bridge over Van Duzen River on Northwestern Pacific Railroad
Replaced by a new bridge
Replaced 1913
Ohman Creek Bridge   [Map · Street View]
Concrete tee beam bridge over Ohman Creek on State Route 254
Open to traffic
Built 1939
Old Mattole Road Bridge   [Map]
Pratt half-through truss bridge over McNutt Creek on Old Mattole Road
Open to traffic
Built 1926
Old Smith Point Bridge   [Map · Street View]
Deck girder bridge over South Fork Eel River on Benbow Drive
Open to traffic
Built 1934
Old Trinity River Hwy Bridge   [Map · Street View]
Closed-spandrel arch bridge over Hostler Creek on Abandoned Trinity River Hwy (CA 96)
Intact but closed to all traffic
Bypassed in 1992
Orleans Bridge (1912)   [Map]
Lost Wire suspension bridge over Klamath River on SH 96
Replaced by a new bridge
Built in 1912, destroyed in 1936 (some accounts say by fire in 1921 or 1926)
Orleans Bridge (1940)   [Map]
Lost Wire suspension bridge over Klamath River on SH 96
Replaced by a new bridge
Built in 1940, destroyed by flood in 1964
Orleans Bridge (1966)   [Map · Street View]
Suspension bridge over Klamath River on CA 96
Open to traffic
Built 1966
Palco Rd Bridge   [Map]
Concrete tee beam bridge over Yager Creek on Palco Rd
Open to traffic
Built unknown year.
Redwood Creek Bridge   [Map · Street View]
Lost Pratt through truss bridge over Redwood Creek on US HIGHWAY 101
Replaced by new bridge
Replaced unknown year, current bridge installed 1988.
Redwood Creek Ranch Bridge   [Map]
Abandoned pratt through truss bridge over Redwood Creek
Abandoned
Redwood Drive Bridge   [Map]
Concrete arch bridge over Bear Gulch on Redwood Drive
Replaced by new bridge
Built 1921, replaced 2004
Robert H. Madsen Memorial Bridge   [Map]
Abandoned steel stringer bridge over Jordan Creek on Former Highway 101
Derelict/abandoned
Built 1938
Rohnerville Road-Strongs Creek Bridge   [Map · Street View]
Concrete tee beam bridge over Strongs Creek on Rohnerville Road
Open to traffic
Built 1915; rehabilitated 1979
Samoa Bridge   [Map]
Steel stringer bridge over Humboldt Bay on CA255
Open to traffic
Built 1971
Shrine Drive-Thru Tree   [Map · Street View]
Tunnel on Private Drive
Open to traffic
Smith Point Bridge   [Map · Street View]
Beam bridge over South Fork Eel River on US HIGHWAY 101
Open to traffic
Built 1980
South Fork Eel River Bridge   [Map · Street View]
Through truss bridge over South Fork Eel River on CA 271 (formerly US 101)
Open to traffic
Built 1917; rehabilitated 1934
South Fork Trinity River Bridge (1929)   [Map · Street View]
Lost Deck truss bridge over South Fork Trinity River on State Route 299 in Salyer
Replaced by new bridge
Built 1929, Replaced 1988
South Fork Trinity River Bridge (Pre 1929)   [Map]
Wire suspension bridge over South Fork of the Trinity River on Redding-Eureka Wagon Road
Demolished in 1929
This bridge was built on the wagon road that connected Eureka to Redding and is now known as California State Route 299.
Sprowl Creek Road Bridge   [Map]
Lost Parker through truss bridge over South Fork Eel River on Sprowl Creek Road
Replaced by new bridge
Replaced 1982
Supply Creek Bridge   [Map]
Lost Pony truss bridge over Supply Creek on unnamed road
No longer exists
Built 1882
US 101 Big Lagoon Bridge   [Map]
Lost Deck truss bridge over Maple Creek on US 101
Replaced by a new bridge
Valley Flower Bridge   [Map]
Lost Concrete tee beam bridge over Salt River on Dillon Road in Port Kenyon
Replaced by a concrete beam bridge in 1994
Built 1919, Replaced 1994
Van Duzen River Bridge   [Map]
Lost concrete arch bridge over Van Duzen River on CA 36
Replaced by a reinforced concrete box girder bridge in 1984
Built 1922
Van Duzen River Bridge   [Map · Street View]
Concrete through arch bridge over Van Duzen River on Abandoned CA-36
Open to pedestrians
Built 1925, Abandoned 1985
Van Duzen River Bridge   [Map · Street View]
Deck arch bridge over Van Duzen River on abandoned section of CA-36 in Bridgeville
Intact but closed to all vehicular traffic, open to pedestrians and bicyclists. Bypassed.
Built 1925
Van Duzen River Bridge (1901)   [Map]
Lost Camelback through truss bridge over Van Duzen River on Road
Replaced by a new bridge
Built 1901; Replaced 1925
Van Duzen River Bridge (1925)   [Map · Street View]
Lost Open-spandrel arch bridge over Van Duzen River on U.S. 101
Replaced by new bridge in 1996
Built 1925, Replaced 1996
Weitchpec Bridge   [Map · Street View]
Deck truss bridge over Klamath River on CA 96
Open to traffic
Built 1949
Zanes Road Bridge 05-12-05   [Map · Street View]
Covered bridge over Elk River on Zanes Road in Pine Hills
Open to traffic
Built 1936