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
INTERSTATE 710
FairOver: DRAIN
07-LA-710-R27.02-MONP, Los Angeles, CA
Built 1965 Load: 99.9 t ADT: 45,500
BASS LAKE RD
FairOver: LEWIS CREEK
0.1 MI S/E STATE RTE 41, Madera, CA
Built 1933 Load: 99.9 t ADT: 3,097
STATE ROUTE 49
FairOver: OLIVER CREEK
10-MPA-049-5.46, Mariposa, CA
Built 1948 Load: 99.9 t ADT: 3,725
STATE ROUTE 49
FairOver: PEG LEG CREEK
10-MPA-049-12.21, Mariposa, CA
Built 1960 Load: 99.9 t ADT: 3,725
U.S. HIGHWAY 101
FairOver: RATTLESNAKE CREEK
01-MEN-101-R83.99, Mendocino, CA
Built 1952 Load: 99.9 t ADT: 6,200
U.S. HIGHWAY 101
FairOver: RED MOUNTAIN CREEK
01-MEN-101-M100.46, Mendocino, CA
Built 1955 Load: 99.9 t ADT: 6,100
U.S. HIGHWAY 101
FairOver: CEDAR CREEK
01-MEN-101-R89.24, Mendocino, CA
Built 1969 Load: 99.9 t ADT: 6,100
CANYON ROAD
FairOver: LOS BANOS CREEK
1.4 MI S SUNSET AVE, Merced, CA
Built 1970 Load: 99.9 t ADT: 830
U.S. HIGHWAY 395
FairOver: CROOKED CREEK
09-MNO-395-R12.48, Mono, CA
Built 1970 Load: 99.9 t ADT: 13,100
INTERSTATE 5
FairOver: EL TORO DRAIN
12-ORA-005-16.32-LGNH, Orange, CA
Built 1959 Load: 99.9 t ADT: 315,500
CARLSBAD BLVD NB
FairOver: LAS ENCINAS CREEK
0.6MI S/O PALOMAR AIRPORT, San Diego, CA
Built 1951 Load: 99.9 t ADT: 12,300
STATE ROUTE 84
FairOver: LA HONDA CREEK
04-SM-084-9.67, San Mateo, CA
Built 1954 Load: 99.9 t ADT: 2,900
EL RANCHO ROAD
FairOver: SAN ANTONIO CREEK
FROM MAIN GATE: TAKE CALI, Santa Barbara, CA
Built 2003 Load: 99.9 t ADT: 750
INTERSTATE 5
FairOver: SHOTGUN CREEK
02-SHA-005-R55.59, Shasta, CA
Built 1957 Load: 99.9 t ADT: 17,100
INTERSTATE 5
FairOver: LITTLE CASTLE CREEK
02-SIS-005-0.04, Siskiyou, CA
Built 1960 Load: 99.9 t ADT: 18,000
U.S. HIGHWAY 101
FairOver: WEST SLOUGH
04-SON-101-34.65-HLBG, Sonoma, CA
Built 1960 Load: 99.9 t ADT: 45,500
CALISTOGA ROAD
FairOver: PORTER CREEK
7.2 MI INTRX WITH SR 12, Sonoma, CA
Built 1950 Load: 99.9 t ADT: 4,400
INTERSTATE 5
FairOver: DEL PUERTO CREEK
10-STA-005-18.13, Stanislaus, CA
Built 1967 Load: 99.9 t ADT: 41,000
LAGUNA ROAD
FairOver: MUGU LAGOON
NBVC POINT MUGU, Ventura, CA
Built 1949 Load: 99.9 t ADT: 200
ROAD 20N24
GoodOver: PONDEROSA SPILLWAY
PONDEROSA RESERVOIR, Butte, CA
Built 1960 ADT: 50
ROAD 21N16
GoodOver: SLY CREEK SPILLWAY (DAM)
NO DATA ENTERED, Butte, CA
Built 1961 ADT: 50
ROAD 20N15
GoodOver: S FORK FEATHER RIVER
NO DATA ENTERED, Butte, CA
Built 1950 ADT: 5
ROAD 23N60
GoodOver: LOWER MARBLE CREEK
NO DATA ENTERED, Butte, CA
Built 1961 ADT: 50
NO DATA ENTERED
GoodOver: BLUE CREEK
NO DATA ENTERED, Calaveras, CA
Built 2002 ADT: 50
U.S. HIGHWAY 101
GoodOver: PANTHER CREEK
01-DN-101-8.34, Del Norte, CA
Built 2021 ADT: 4,900
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S28 T18N R4E, Del Norte, CA
Built 1972 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S27 T18N R4E, Del Norte, CA
Built 1973 ADT: 50
NO DATA ENTERED
GoodOver: MIDDLE FORK SMITH RIVER
S11 T17N R3E, Del Norte, CA
Built 1954 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S22 T18N R4E, Del Norte, CA
Built 1967 ADT: 50
NO DATA ENTERED
GoodOver: PLUM CREEK
NO DATA ENTERED, El Dorado, CA
Built 2009 ADT: 50
WINDING ROAD
GoodOver: SLAB CREEK
NO DATA ENTERED, El Dorado, CA
Built 1972 ADT: 50
NO DATA ENTERED
GoodOver: WINDING ROAD
NO DATA ENTERED, El Dorado, CA
Built 1974 ADT: 50
WINDING ROAD
GoodOver: AMERICAN RIVER
NO DATA ENTERED, El Dorado, CA
Built 1938 ADT: 50
11N74
GoodOver: SOUTH FORK AMERICAN
NO DATA ENTERED, El Dorado, CA
Built 2004 ADT: 10
WINDING ROAD
GoodOver: SOUTH FORK AMERICAN RIVE
NO DATA ENTERED, El Dorado, CA
Built 2000 ADT: 10
PLUM CREEK RD
GoodOver: MILL CREEK
HWY 50 E TO 10N40 RD, El Dorado, CA
Built 2013 ADT: 75
FOUNTAIN PLACE RD
GoodOver: NO DATA ENTERED
NO DATA ENTERED, El Dorado, CA
Built 2018 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
NO DATA ENTERED, El Dorado, CA
Built 2005 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
NO DATA ENTERED, El Dorado, CA
Built 2005 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
NO DATA ENTERED, El Dorado, CA
Built 2005 ADT: 50
NO DATA ENTERED
GoodOver: COW CREEK
NO DATA ENTERED, Fresno, CA
Built 2021 ADT: 15
NO DATA ENTERED
GoodOver: RED CAP CREEK
S19 T10N R6E, Humboldt, CA
Built 1977 ADT: 50
NO DATA ENTERED
GoodOver: N FORK RED CAP CREEK
NO DATA ENTERED, Humboldt, CA
Built 1967 ADT: 50
NO DATA ENTERED
GoodOver: GROUSE CREEK
NO DATA ENTERED, Humboldt, CA
Built 1997 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S15 T6N R4E, Humboldt, CA
Built 1974 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
NO DATA ENTERED, Humboldt, CA
Built 1988 ADT: 50
NO DATA ENTERED
GoodOver: NO DATA ENTERED
S19 T2N R6E, Humboldt, CA
Built 1983 ADT: 50
PAVED ROAD
GoodOver: LONE PINE CREEK
WHITNEY PORTAL CG, Inyo, CA
Built 1975 ADT: 50
ROAD
GoodOver: TROUT CREEK
TROUT CREEK, Lake, CA
Built 2016 ADT: 50
NO DATA ENTERED
GoodOver: PINE CREEK
NO DATA ENTERED, Lassen, CA
Built 1961 ADT: 20
Showing 17,001-17,050 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.