Total Bridges
27,040
Public highway bridges in California
State profile · Below national median SD
California bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in California — drawn straight from the FHWA National Bridge Inventory.
- 27,040
- Public bridges
- 32.5%
- Good condition
- 4.6%
- Poor condition
- 4.6%
- Structurally deficient
Good Condition
32.5%
8,777 bridges rated 7-9
-17.5pp vs 50% benchmark
Poor Condition
4.6%
1,244 bridges rated 0-4
Structurally Deficient
4.6%
1,244 bridges flagged for repair priority
-2.4pp vs national avg 7.0%
California vs national bridge condition
California — Good condition share 32.5%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
California — Structurally deficient share 15.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — California (FHWA NBI)
Counties (58)
Alameda 800 Alpine 32 Amador 62 Butte 441 Calaveras 106 Colusa 211 Contra Costa 686 Del Norte 96 El Dorado 196 Fresno 929 Glenn 242 Humboldt 398 Imperial 448 Inyo 67 Kern 686 Kings 168 Lake 129 Lassen 108 Los Angeles 3937 Madera 250 Marin 217 Mariposa 109 Mendocino 357 Merced 532 Modoc 87 Mono 49 Monterey 390 Napa 160 Nevada 135 Orange 1224 Placer 347 Plumas 170 Riverside 1142 Sacramento 775 San Benito 76 San Bernardino 1465 San Diego 1707 San Francisco 170 San Joaquin 666 San Luis Obispo 408 San Mateo 393 Santa Barbara 429 Santa Clara 1041 Santa Cruz 203 Shasta 500 Sierra 65 Siskiyou 423 Solano 383 Sonoma 613 Stanislaus 390 Sutter 120 Tehama 452 Trinity 194 Tulare 599 Tuolumne 128 Ventura 511 Yolo 282 Yuba 136
California vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below California on the same metric.
39
Ohio
4.54% top marginal rate
34
New Jersey
4.59% top marginal rate
06
California
4.60% top marginal rate
05
Arkansas
4.71% top marginal rate
53
Washington
4.81% top marginal rate
Bridges Needing Most Attention in California
Six lowest-condition bridges in California, ranked by composite NBI rating. Each is inspected at least every 24 months.
SPRING CREEK RD
PoorOver: FALL RIVER
0.5 MI N OF MCARTHUR RD, Shasta, CA
Built 1950 Load: 2.7 t ADT: 50
ORESTIMBA ROAD
PoorOver: CCID MAIN CANAL
0.1 MI E DRAPER RD, Stanislaus, CA
Built 1919 Load: 2.9 t ADT: 684
CLARK STREET
PoorOver: M.I.D. CANAL
0.1 MI WEST OF ROAD 26.0, Madera, CA
Built 1955 Load: 3.2 t ADT: 200
GULLING STREET
Structurally DeficientOver: MIDDLE FORK FEATHER RIV
0.2 MI S SH 70, Plumas, CA
Built 1954 Load: 3.2 t ADT: 10,046
AVENUE 10
PoorOver: COTTONWOOD CREEK
JUST E/O ROAD 23, Madera, CA
Built 1950 Load: 3.6 t ADT: 50
S BISHOP AVE
PoorOver: CRESCENT DITCH
0.64 MI S/O MT WHITNEY AV, Fresno, CA
Built 1950 Load: 3.9 t ADT: 125
All Bridges in California
EVANS ROAD
GoodOver: CORTINA CREEK
1.6 MI SOUTH MEYERS RD, Colusa, CA
Built 2012 Load: 32.4 t ADT: 250
WALNUT DRIVE
GoodOver: SPRING CREEK
2.3 MI W OF ZUMWALT RD., Colusa, CA
Built 2010 Load: 32.4 t ADT: 410
MCDERMOTT RD.
GoodOver: TERESA CREEK
0.7 MI N OF DELEVAN RD., Colusa, CA
Built 2010 Load: 32.4 t ADT: 318
E CAMP ROAD
GoodOver: SPRING CREEK
3.4 MI S OF S.R. 20, Colusa, CA
Built 2012 Load: 32.4 t ADT: 307
LENAHAN ROAD
GoodOver: FUNKS CREEK
0.2 MI W OF SUTTON ROAD, Colusa, CA
Built 2015 Load: 32.4 t ADT: 48
COUNTY LINE ROAD
GoodOver: 108 MAIN DRAIN (SYCAMOR)
4 MI EAST OF HWY 5, Colusa, CA
Built 2017 Load: 32.4 t ADT: 200
Byron Highway
GoodOver: Delta-Mendota Canal
0.3 MI N Alameda CL, Contra Costa, CA
Built 1953 Load: 32.4 t ADT: 6,500
STATE ROUTE 4 WB
GoodOver: CONTRA COSTA CANAL
04-CC-004-R20.32, Contra Costa, CA
Built 1997 Load: 32.4 t ADT: 63,500
STATE ROUTE 4 EB
GoodOver: CONTRA COSTA CANAL
04-CC-004-R20.32, Contra Costa, CA
Built 1997 Load: 32.4 t ADT: 63,500
STATE ROUTE 242
GoodOver: HOLBROOK CHANNEL
04-CC-242-R2.65-CND, Contra Costa, CA
Built 1978 Load: 32.4 t ADT: 100,000
INTERSTATE 680 NB
GoodOver: UP,BNSF,AMTRAK,SUISUN BA
04-CC-680-R25.04R-MTZ, Contra Costa, CA
Built 2007 Load: 32.4 t ADT: 105,000
WILLOW PASS ROAD
GoodOver: PINE CREEK
04-CC-242-R0.90-CND, Contra Costa, CA
Built 1963 Load: 32.4 t ADT: 22,357
S680 ON-MARINA VIS
GoodOver: MARSH WETLANDS
04-CC-680-24.30, Contra Costa, CA
Built 2016 Load: 32.4 t ADT: 2,650
SB 680-WB 4 CONN
GoodOver: BLUM ROAD
04-CC-680-21.50, Contra Costa, CA
Built 2005 Load: 32.4 t ADT: 14,100
INTERSTATE 680
GoodOver: E MARTINEZ DRAIN
04-CC-680-22.27, Contra Costa, CA
Built 1962 Load: 32.4 t ADT: 118,000
INTERSTATE 680
GoodOver: SOUTH MOCOCO DRAIN
04-CC-680-23.99, Contra Costa, CA
Built 1962 Load: 32.4 t ADT: 105,000
INTERSTATE 80
GoodOver: BARTD
04-CC-080-2.50-RCH, Contra Costa, CA
Built 1970 Load: 32.4 t ADT: 179,000
I-580 W ON RAMP
GoodOver: CENTRAL AVE
04-CC-580-0.25-RCH, Contra Costa, CA
Built 1991 Load: 32.4 t ADT: 4,400
I-580 ON RAMP
GoodOver: CENTRAL AVE
04-CC-580-0.34-RCH, Contra Costa, CA
Built 1991 Load: 32.4 t ADT: 4,400
STATE ROUTE 4 WB
GoodOver: WALNUT CREEK
04-CC-004-R13.40, Contra Costa, CA
Built 1981 Load: 32.4 t ADT: 41,300
STATE ROUTE 4 EB
GoodOver: WALNUT CREEK
04-CC-004-R13.40, Contra Costa, CA
Built 1981 Load: 32.4 t ADT: 41,300
PACHECO BLVD
GoodOver: E MARTINEZ DRAIN
04-CC-680-22.54, Contra Costa, CA
Built 1962 Load: 32.4 t ADT: 1,000
INTERSTATE 680
GoodOver: GREEN VALLEY CREEK
04-CC-680-R7.64, Contra Costa, CA
Built 1964 Load: 32.4 t ADT: 190,100
BAYVIEW-W580 ONRMP
GoodOver: NONE
04-CC-580-1.23, Contra Costa, CA
Built 1987 Load: 32.4 t ADT: 3,600
BAILEY RD-W4 ONRMP
GoodOver: CONTRA COSTA CANAL
04-CC-004-R20.02, Contra Costa, CA
Built 1997 Load: 32.4 t ADT: 47,000
STATE ROUTE 4 WB
GoodOver: BNSF RY & AMTRAK
04-CC-004-R3.66L-MTZ, Contra Costa, CA
Built 2001 Load: 32.4 t ADT: 21,750
ROUTE 580 WB
GoodOver: HILLSIDE
04-CC-580-5.78-RCH, Contra Costa, CA
Built 1989 Load: 32.4 t ADT: 68,000
WB80-POMONA ST OFF
GoodOver: DOWRELIO DR
04-CC-080-13.76-VAL, Contra Costa, CA
Built 2003 Load: 32.4 t ADT: 1,400
STATE ROUTE 4 WB
GoodOver: FRANKLIN CANYON RD
04-CC-004-R2.70L, Contra Costa, CA
Built 2001 Load: 32.4 t ADT: 40,500
STATE ROUTE 4 EB
GoodOver: SAND CREEK
04-CC-004-M34.40, Contra Costa, CA
Built 2013 Load: 32.4 t ADT: 7,700
STATE ROUTE 4 WB
GoodOver: CONTRA COSTA CANAL
04-CC-004-R31.28-ANT, Contra Costa, CA
Built 2008 Load: 32.4 t ADT: 20,000
STATE ROUTE 4 EB
GoodOver: CONTRA COSTA CANAL
04-CC-004-R31.27-ANT, Contra Costa, CA
Built 2008 Load: 32.4 t ADT: 20,000
FAIRVIEW AVE
GoodOver: STATE ROUTE 4
04-CC-004-R37.00-BTWD, Contra Costa, CA
Built 2009 Load: 32.4 t ADT: 15,400
STATE ROUTE 4
GoodOver: MARSH CREEK
04-CC-004-R37.70-BTWD, Contra Costa, CA
Built 2009 Load: 32.4 t ADT: 15,400
STATE ROUTE 4 EB
GoodOver: CENTURY BLVD
04-CC-004-25.00-ANT, Contra Costa, CA
Built 2013 Load: 32.4 t ADT: 57,000
STATE ROUTE 4
GoodOver: DEER CREEK
04-CC-004-R35.47-BTWD, Contra Costa, CA
Built 2018 Load: 32.4 t ADT: 45,500
W4-N160 CONNECTOR
GoodOver: UPRR TRACKS
04-CC-160-L0.43R-ANT, Contra Costa, CA
Built 2016 Load: 32.4 t ADT: 11,400
STATE ROUTE 4
GoodOver: GRAYSON CREEK
04-CC-004-12.89, Contra Costa, CA
Built 2021 Load: 32.4 t ADT: 82,600
INTERSTATE RTE 580
GoodOver: STEGE DRAIN
04-CC-580-1.17-RCH, Contra Costa, CA
Built 2022 Load: 32.4 t ADT: 92,300
ESCOBAR ST
GoodOver: ARROYO DEL HAMBRE
AT CASTRO STREET, Contra Costa, CA
Built 1987 Load: 32.4 t ADT: 4,900
MARKET ST
GoodOver: PINE CREEK
AT CLAYTON ST, Contra Costa, CA
Built 1972 Load: 32.4 t ADT: 16,169
YGNACIO VALLEY RD
GoodOver: WALNUT CREEK
0.8 MI E OF I 680, Contra Costa, CA
Built 1975 Load: 32.4 t ADT: 65,100
BAILEY RD
GoodOver: CONTRA COSTA CANAL
AT SR 4, Contra Costa, CA
Built 1969 Load: 32.4 t ADT: 16,200
DELTA ROAD
GoodOver: ROCK SLOUGH
3 MI E KNIGHTSEN, Contra Costa, CA
Built 2001 Load: 32.4 t ADT: 532
EL PORTAL AVE
GoodOver: SAN RAMON CREEK
0.06 MI NE DANVILLE BLVD, Contra Costa, CA
Built 1989 Load: 32.4 t ADT: 600
CAMINO DIABLO
GoodOver: KELLOGG CREEK
0.2 MI E VASCO RD, Contra Costa, CA
Built 1988 Load: 32.4 t ADT: 1,462
DEER VALLEY RD
GoodOver: MARSH CREEK
0.3 MI N MARSH CREEK RD, Contra Costa, CA
Built 1991 Load: 32.4 t ADT: 2,400
HOUGH AVE
GoodOver: LAFAYETTE CREEK
0.3 MI S MOUNT DIABLO BLV, Contra Costa, CA
Built 1986 Load: 32.4 t ADT: 2,000
NICHOLS RD
GoodOver: UP RR, BNSF RY, & AMTRAK
0.3 MI N PORT CHICAGO HY, Contra Costa, CA
Built 1991 Load: 32.4 t ADT: 485
MARINA VISTA AVE
GoodOver: ARROYO DEL HAMBRE
AT CASTRO ST, Contra Costa, CA
Built 1989 Load: 32.4 t ADT: 4,500
Showing 20,101-20,150 of 27,040 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.