Status: Open to traffic
Location: 40.526954,-122.938587
Carries County Line Road over Browns Creek
Design: truss/deck
Design Details: Deck truss
Total Length: 51.8 Feet
Span Length: 49.9 Feet
Overview: Deck truss bridge over Browns Creek on County Line Road
History: Built 1934
Built: 1934
Location: Trinity County
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Status: Open to traffic
Location: 41.008889,-122.620000
Carries East Side Road over East Fork Trinity River
Design: truss/pony/warren
Design Details: Warren Pony truss
Total Length: 139.1 Feet
Span Length: 134.8 Feet
Overview: Pony truss bridge over East Fork Trinity River on East Side Road
History: Built 1960
Built: 1960
Location: Trinity County
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Status: Open to traffic
Location: 40.675973,-122.835688
Carries Fawn Lodge Road over Grass Valley Creek
Design: truss/pony/bailey
Design Details: Bailey truss
Total Length: 63.0 Feet
Span Length: 60.0 Feet
Overview: Bailey truss bridge over Grass Valley Creek on Fawn Lodge Road in Lewiston
History: Built 1957
Built: 1957
Location: Trinity County
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190893
FawnLodge 1.JPG
Looking north along the deck.
Photo by Kevin Pope, Dec 2010
190894
FawnLodge 2.JPG
Looking north along the deck with weight limit sign.
Photo by Kevin Pope, Dec 2010
190895
FawnLodge 3.JPG
East elevation of the bridge looking north.
Photo by Kevin Pope, Dec 2010
190896
FawnLodge 4.JPG
East elevation of the bridge looking north.
Photo by Kevin Pope, Dec 2010
190897
FawnLodge 05.JPG
West elevation of the bridge looking north.
Photo by Kevin Pope, Dec 2010
190898
FawnLodge 06.JPG
Survey disk on top of the south abutment.
Photo by Kevin Pope, Dec 2010
Status: Replaced by a pre-cast concrete girder bridge in 2004
Location: 40.548859,-123.170901
Carries Bridge Street over Hayfork Creek
Design: truss/pony
Design Details: Pony truss
Total Length: 132.9 Feet
Span Length: 129.9 Feet
Overview: Pony truss bridge over Hayfork Creek on Bridge Street in Hayfork
History: Built 1948, Replaced 2004
Built: 1948
Location: Trinity County
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Status: No longer exists
Location: 41.143577,-122.647238
Carries Ramshorn Road over Ramshorn Creek
Design: truss/pony
Design Details: Pony truss
Total Length: 123.0 Feet
Span Length: 75.1 Feet
Overview: Lost pony truss bridge over Ramshorn Creek on Ramshorn Road
History: Replaced 2001
Built:
Location: Trinity County
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Status: Open to traffic
Location: 40.707778,-122.807778
Carries Turnpike Road over Trinity River
Design: truss/through/baltimore
Design Details: Pinned Baltimore through truss
Total Length: 305.1 Feet
Span Length: 180.1 Feet
Overview: Through truss bridge over Trinity River on Turnpike Road in Lewiston
History: Built 1901; rehabilitated 1975
Built: 1901
Location: Trinity County
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152970
Trinity River Bridge
Photo taken by Michael Goff on January 17, 2010
152971
Trinity River Bridge
Photo taken by Michael Goff on January 17, 2010
152972
Trinity River Bridge
Photo taken by Michael Goff on January 17, 2010
152973
Trinity River Bridge
Photo taken by Michael Goff on January 17, 2010
152974
Pinned Truss Connection
Photo taken by Michael Goff on January 17, 2010
152975
Upper Chord Connection
Photo taken by Michael Goff on January 17, 2010
152976
Pinned Connection
Photo taken by Michael Goff on January 17, 2010
152977
Historic Bridge Sign
Photo taken by Michael Goff on January 17, 2010
152978
Truss Span Pier
Photo taken by Michael Goff on January 17, 2010
Status: Open to pedestrians
Location: 40.793762,-123.356327
Carries Abandoned CA 299 over Swede Creek
Design: arch/deck/closed
Design Details: The Swede Creek Bridge is a closed spandrel arch bridge featuring an approximately 80-foot main span and a 110-foot overall structure length. The bridge is located adjacent to a newer alignment of CA 299. The bridge features many of the architectural treatments of the era such an ornamental railing and date stamps.
Total Length: 110.0 Feet
Span Length: 80.0 Feet
Overview: Closed-spandrel arch bridge over Swede Creek on Abandoned CA 299
History: Built 1923
Built: 1923
Location: Trinity County
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152986
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152987
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152988
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152989
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152990
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152991
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
152992
Date Stamp
Photo taken by Michael Goff on January 17, 2010
152993
Roadway View
Photo taken by Michael Goff on January 17, 2010
152994
Swede Creek Bridge
Photo taken by Michael Goff on January 17, 2010
Status: Closed to all traffic
Abandoned in place
Location: 40.029883,-123.493338
Carries Northwestern Pacific Railroad over Eel River
Design: truss/through/warren
Design Details: Warren through truss
Total Length: 578.0 Feet
Span Length: 200.0 Feet
Overview: Warren through truss bridge over Eel River on Northwestern Pacific Railroad
History: Built 1965
Built: 1965
Location: Trinity County
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167847
Island mountain Bridge 1965
Island Mountain Bridge was mostly swept away in the floods of December, 1964. This picture is from 1965, during rebuilding and replacing of much of the original spans and foundations.
California Humboldt Library collection
167848
Island mountain 1965
Train crossing after floods of 1964
California Humboldt Library Collection
507530
NWP - Island Mountain Bridge (1965)
Photo from old postcard
Status: Replaced by a new bridge
Location: 40.375735,-123.503363
Carries West Van Duzen Road over Van Duzen River
Design: beam/stringer/steel
Design Details: Steel stringer with concrete piers. Old concrete piers visible next to current bridge.
Total Length: 162.1 Feet
Span Length: 65.9 Feet
Overview: Lost steel stringer bridge over Van Duzen River on West Van Duzen Road
History: Built 1965, demolished circa 2013
Built: 1965
Location: Trinity County
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167810
West Van Duzen Road bridge
Looking South
Photo taken by Craig Philpott in June 2010
Status: Open to traffic
Location: 40.690000,-123.028889
Carries Evans Bar Road over Soldier Creek
Design: arch/deck/steel
Design Details: Steel arch
Total Length: 30.5 Feet
Span Length: 24.0 Feet
Overview: Steel arch bridge over Soldier Creek on Evans Bar Road
History: Built 2006
Built: 2006
Location: Trinity County
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189318
EvansBar_Deck.JPG
Looking south along the bridge deck.
Photo taken by Kevin Pope in November 2010
189319
EvansBar_West.JPG
View of the west (upstream) elevation.
Photo taken by Kevin Pope in November 2010
189320
EvansBar_East.JPG
View of the east (downstream) elevation.
Photo taken by Kevin Pope in November 2010
Status: Open to traffic
Location: 40.690278,-123.036944
Carries Dutch Creek Road over Soldier Creek
Design: arch/deck/steel
Design Details: Steel arch
Total Length: 30.5 Feet
Span Length: 24.0 Feet
Overview: Steel arch bridge over Soldier Creek on Dutch Creek Road
History: Built 2006
Built: 2006
Location: Trinity County
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189315
DutchCreek_Deck.JPG
Looking North along the bridge deck.
Photo taken by Kevin Pope in November 2010
189316
DutchCreek_West.JPG
View of the west (upstream) elevation.
Photo taken by Kevin Pope in November 2010
189317
DutchCreek_East.JPG
View of the east (downstream) elevation.
Photo taken by Kevin Pope in November 2010
Status: Open to traffic
Location: 40.675705,-122.828638
Carries Old CA-299 over Grass Valley Creek
Design: beam/tee
Design Details: 3 Span - Reinforced Concrete T-Beam (Unconfirmed)
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Concrete tee beam bridge over Grass Valley Creek on Old CA-299
History: Built 1928
Built: 1928
Location: Trinity County
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190956
GrassValley 01.JPG
Looking east along the deck.
Photo by Kevin Pope, Dec 2010
190957
GrassValley 02.JPG
Looking west along the deck.
Photo by Kevin Pope, Dec 2010
190958
GrassValley 03.JPG
End of north bridge rail looking east.
Photo by Kevin Pope, Dec 2010
190959
GrassValley 04.JPG
End of south bridge rail looking east, showing some of the elevation.
Photo by Kevin Pope, Dec 2010
190960
GrassValley 05.JPG
Interior of the north bridge rail looking west.
Photo by Kevin Pope, Dec 2010
190961
GrassValley 06.JPG
Elevation looking west along the south side of the bridge.
Photo by Kevin Pope, Dec 2010
190962
GrassValley 07.JPG
Elevation looking west along the north side of the bridge.
Photo by Kevin Pope, Dec 2010
190963
GrassValley 08.JPG
End of the south rail looking west.
Photo by Kevin Pope, Dec 2010
190964
GrassValley 09.JPG
South elevation showing the date stamp on the bridge.
Photo by Kevin Pope, Dec 2010
190969
GrassValley 10.JPG
Closer view of the date stamp on the north elevation.
Photo by Kevin Pope, Dec 2010
Status: Open to traffic
Slated for demolition and replacement.
Location: 41.013889,-122.610000
Carries East Fork Road over Halls Gulch
Design: beam/stringer/steel
Design Details: Railroad flatcar bridge.
Total Length: 54.1 Feet
Span Length: 49.9 Feet
Overview: Steel stringer bridge over Halls Gulch on East Fork Road
History: Built 1973
Built: 1973
Location: Trinity County
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Status: Open to pedestrians only
Location: 40.552330,-123.181489
Carries pedestrian pathway over Hayfork Creek
Design: suspension/wire
Design Details: Wire/cable suspension
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Wire suspension bridge over Hayfork Creek on pedestrian pathway
History:
Built:
Location: Trinity County
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Status: Closed
Location: 40.031443,-123.493870
Carries Northwestern Pacific Railroad over
Design: tunnel
Design Details: Tunnel
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Tunnel on Northwestern Pacific Railroad
History:
Built:
Location: Trinity County
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324707
Tunnel
Island Mountain Bridge was mostly swept away in the floods of December, 1964. This picture is from 1965, during rebuilding and replacing of much of the original spans and foundations. California Humboldt Library collection
Photo submitted Craig Philpott
Status: Destroyed by flooding
Location: 40.030178,-123.493841
Carries Northwestern Pacific Railroad over Eel River
Design: truss/deck/warren
Design Details: Warren deck truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Warren deck truss bridge over Eel River on Northwestern Pacific Railroad
History: Built 1913; Destroyed by flooding 1964
Built: 1913
Location: Trinity County
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Status: Derelict/abandoned, most of deck missing. Unknown what it leads to.
Location: 40.592701,-123.262781
Carries over Hayfork Creek
Design: suspension/wire
Design Details: Wire/cable suspension, towers are truss-like.
Total Length: 220.0 Feet
Span Length: 200.0 Feet
Overview: Abandoned wire suspension bridge over Hayfork Creek
History: This bridge was built after oil barrels were invented, they are used for the foundation. A bridge appears at this location on the 1982 Halfway Ridge USGS topo map, but not on the 1951 Hyampom topo.
Built:
Location: Trinity County
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Status: Open to pedestrians only
Location: 40.780350,-123.308980
Carries Old Big French Creek Road over Big French Creek
Design: unknown
Design Details:
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Bridge over Big French Creek on Old Big French Creek Road
History:
Built:
Location: Trinity County
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Status:
Location: 40.558173,-123.121425
Carries over Hayfork Creek
Design: truss/pony/pratt
Design Details: Pratt pony truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Pratt pony truss bridge over Hayfork Creek
History:
Built:
Location: Trinity County
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Status: Open to traffic
Location: 40.820828,-123.123982
Carries East Fork Road over East Fork of North Fork Trinity River
Design: truss/deck
Design Details: Deck truss with concrete deck
Total Length: 50.9 Feet
Span Length: 47.9 Feet
Overview: Deck truss bridge over East Fork of North Fork Trinity River on East Fork Road
History: Built 1938; rehabilitated 1960
Built: 1938
Location: Trinity County
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Status: Open to traffic
Location: 40.739203,-123.244297
Carries State Route 299 over Manzanita Creek
Design: beam/tee
Design Details: Concrete tee beam
Total Length: 53.2 Feet
Span Length: 51.2 Feet
Overview: Concrete tee beam bridge over Manzanita Creek on State Route 299
History: Built 1923; rehabilitated 1973
Built: 1923
Location: Trinity County
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Status: Open to pedestrians only
Location: 40.635378,-123.363216
Carries Trail off of Pattison Peak Road over Corral Creek
Design: suspension/wire
Design Details: Wire/cable suspension
Total Length: 80.0 Feet
Span Length: 60.0 Feet
Overview: Wire suspension bridge over Corral Creek on Trail off of Pattison Peak Road
History: Rehabilitated 2017
Built:
Location: Trinity County
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Status: Open to pedestrians only
Location: 40.628624,-123.371083
Carries Trail off of Pattison Peak Road over Hayfork Creek
Design: suspension/wire
Design Details: Wire/cable suspension
Total Length: 220.0 Feet
Span Length: 200.0 Feet
Overview: Wire suspension bridge over Hayfork Creek on Trail off of Pattison Peak Road
History: Built 1974 by the Wills Brothers and rehabilitated c. 2015
Built: 1974
Location: Trinity County
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Status: Open to traffic, removed every winter, rebuilt every spring by Bar 717 Ranch
Location: 40.627319,-123.369844
Carries Pattison Peak Road over Hayfork Creek
Design: beam/stringer/wood
Design Details: Timber stringer
Total Length: 30.0 Feet
Span Length: 15.0 Feet
Overview: Timber stringer bridge over Hayfork Creek on Pattison Peak Road
History:
Built:
Location: Trinity County
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Status: Open to pedestrians only
Location: 40.332026,-123.283803
Carries Private Road, South Fork Trail over South Fork of the Trinity River
Design: suspension/wire
Design Details: Wire/cable suspension
Total Length: 0.0 Feet
Span Length: 130.0 Feet
Overview: Wire suspension bridge over South Fork of the Trinity River on South Fork Trail
History:
Built:
Location: Trinity County
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499140
Suspension Bridge over South Fork of Trinity River
Pedestrian wood-and-cable suspension bridge on the South Fork Trail, a National Recreation Trail, through private land.
Photo taken by Jaunting Jan, 2015-04-22.
Status: Demolished in 1929
Location: 40.888740,-123.601428
Carries Redding-Eureka Wagon Road over South Fork of the Trinity River
Design: suspension/wire
Design Details: This bridge was a wire/cable suspension bridge with a wooden deck and a wooden stiffening truss. All span lengths and widths are approximate.
Total Length: 425.0 Feet
Span Length: 425.0 Feet
Overview: Wire suspension bridge over South Fork of the Trinity River on Redding-Eureka Wagon Road
History: This bridge was built on the wagon road that connected Eureka to Redding and is now known as California State Route 299.
Built:
Location: Trinity County
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468842
The bridge, from the northwest.
American Civil Engineering Record
468843
From the southwest, looking at the east bank
American Civil Engineering Record
468844
Looking to the east bank from the west bank.
American Civil Engineering Record
468845
Looking to the east bank. The bridge is at the right, in the center they are pouring the pier for the new bridge.
American Civil Engineering Record
468846
Looking to the east bank. The bridge is at the right, in the center they are pouring the pier for the new bridge.
American Civil Engineering Record
468847
Looking to the north. The new bridge is being constructed in front.
American Civil Engineering Record
468848
Looking to the north. The new bridge is being constructed in front.
American Civil Engineering Record
468849
The bridge from the east bank, with the new bridge on the right.
American Civil Engineering Record
468850
The bridge is on the right, with the new bridge in the center
American Civil Engineering Record
484648
South Fork Trinity River Suspension Bridge
OLD SUSPENSION BRIDGE. This view appears to be looking southeast, at the downstream side of the suspension bridge during construction of new bridge.
Photo from Historic American Engineering Record, creator ; Library of Congress
Status: Replaced by a new bridge
Location: 40.650923,-122.940579
Carries SR 3 over Trinity River
Design: truss/through
Design Details: Through truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Through truss bridge over Trinity River on SR 3
History:
Built:
Location: Trinity County
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484604
Trinity River Bridge
1910 view
Photo from CSU Chico Digital Collection
Status: Replaced by a new bridge
Location: 40.783381,-123.130282
Carries East Fork Road over North Fork Trinity River
Design: truss/through
Design Details: Through truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Through truss bridge over North Fork Trinity River on East Fork Road
History:
Built:
Location: Trinity County
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495480
East Fork Road Bridge
Photo from old postcard
Status: Replaced by a new bridge
Location: 40.790005,-123.440577
Carries SR 299 over Trinity River
Design: truss/through
Design Details: Through truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Through truss bridge over Trinity River on SR 299
History:
Built:
Location: Trinity County
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495481
Cedar Flat Bridge
Photo from old postcard
Status: Open to traffic
Location: 40.667796,-122.906781
Carries Biggers Road over Trinity River
Design: truss/pony/warren/alt-verticals
Design Details: One-lane two-span polygonal Warren pony truss with alternating verticals. East span is longer than west span.
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Warren pony truss bridge over Trinity River on Biggers Road at junction with Steel Bridge Road
History: Former private bridge replaced in 2004 when Trinity River flow increased
Built: 2004
Location: Trinity County
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Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S - Dismantled and/or in storage. L - Severe loss of historic integrity due to alteration.
