State profile · Below median Poor share

California bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in California.

25,848
Public bridges
45.6%
Good condition
5.9%
Poor condition

California holds 25,848 public highway bridges (#4 of 52 by inventory) with a 5.91% Poor share (#28 of 52 by Poor share).

That is 5.9% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 25 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

25,848

Public highway bridges in California

Good Condition

45.6%

11,798 bridges rated 7-9

-4.4pp vs 50% benchmark

Poor Condition

5.9%

1,527 bridges whose lowest applicable component is rated 0-4

-1.6pp vs national avg 7.5%

California vs national bridge condition

California - Good condition share 45.6%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

California - Poor-condition share 19.7%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

California in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: California has 25,848 bridges and a 5.9% Poor-condition share in the 2024 NBI, rank #25 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: California has 25,848 bridges and a 5.9% Poor-condition share in the 2024 NBI, rank #25 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

California vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

25,848 4th of 54 higher than 50 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for California

The highlighted point is California: 25,848 bridges and 5.91% in Poor condition, rank #25 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below California on that same Poor-share ordering:

  • Arkansas: 12,974 bridges · 5.43% Poor
  • Washington: 8,474 bridges · 5.45% Poor
  • California: 25,848 bridges · 5.91% Poor
  • New Jersey: 6,827 bridges · 6.01% Poor
  • Mississippi: 16,739 bridges · 6.03% Poor

The full national sortable table lives on the rankings page.

Material families in California

Exclusive FHWA material families across all 25,848 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains California’s inventory

State agency holds 48.8% of the 25,848 public highway bridges filed under California in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When California’s bridges were built

Pre-1950 construction accounts for 15.5% of the 25,848 bridges with a recorded original year in California. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

California45.6%48.4%GoodFairPoor
Bridge inventory deck-condition mix - California (FHWA NBI)

Counties (58)

Alameda 658 Alpine 32 Amador 61 Butte 437 Calaveras 105 Colusa 211 Contra Costa 618 Del Norte 96 El Dorado 192 Fresno 916 Glenn 242 Humboldt 396 Imperial 444 Inyo 66 Kern 668 Kings 168 Lake 129 Lassen 108 Los Angeles 3547 Madera 247 Marin 207 Mariposa 109 Mendocino 357 Merced 528 Modoc 87 Mono 49 Monterey 377 Napa 158 Nevada 135 Orange 1164 Placer 337 Plumas 165 Riverside 1117 Sacramento 740 San Benito 76 San Bernardino 1422 San Diego 1632 San Francisco 143 San Joaquin 644 San Luis Obispo 401 San Mateo 361 Santa Barbara 418 Santa Clara 964 Santa Cruz 192 Shasta 492 Sierra 65 Siskiyou 421 Solano 373 Sonoma 609 Stanislaus 386 Sutter 121 Tehama 450 Trinity 194 Tulare 589 Tuolumne 125 Ventura 501 Yolo 271 Yuba 127

California vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below California on the same metric.

AR

Arkansas

5.43% top marginal rate
Structure
Progressive
Burden @ $100K
$12,974

WA

Washington

5.45% top marginal rate
Structure
Progressive
Burden @ $100K
$8,474
Selected

CA

California

5.91% top marginal rate
Structure
Progressive
Burden @ $100K
$25,848

NJ

New Jersey

6.01% top marginal rate
Structure
Progressive
Burden @ $100K
$6,827

MS

Mississippi

6.03% top marginal rate
Structure
Progressive
Burden @ $100K
$16,739

Bridges Needing Most Attention in California

Six lowest-condition bridges in California, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

OLD COTTONWOOD CR

Poor

Over: COTTONWOOD CREEK

0.2 MI E/O COTTONWOOD CK, Siskiyou, CA

Built 1957 Load: 0.0 t ADT: 10

STATE ROUTE 211

Poor

Over: EEL RIVER

01-HUM-211-78.10, Humboldt, CA

Built 1911 Load: 0.0 t ADT: 5,300

CR 305 (MAPES RD)

Poor

Over: HARTSON SLOUGH

0.4 MI E/O RD 303, Lassen, CA

Built 1978 Load: 0.0 t ADT: 100

CR 111 (PITTVILLE)

Poor

Over: BEAVER CREEK

1.0 MI S OF CR 404, Lassen, CA

Built 1975 Load: 0.0 t ADT: 100

RD 424 (BASSETT)

Poor

Over: WILLOW CREEK

1.5 MI N OF RD A-2, Lassen, CA

Built 1960 Load: 0.0 t ADT: 120

CR417 (PUNKIN CTR)

Poor

Over: MUDDY SLOUGH NO 1

2.8 MI S OF CR A2, Lassen, CA

Built 1955 Load: 0.0 t ADT: 200

All Bridges in California

SUMMIT AVE

Fair

Over: HILLSIDE

1.4 MI INTRX LOVELL AVE, Marin, CA

Built 1980 Load: 16.8 t ADT: 257

GLENWOOD AVE

Fair

Over: ROSS CREEK

JUST N/O LAGUNITAS RD, Marin, CA

Built 1909 Load: 16.8 t ADT: 2,370

SPRUCE RD

Fair

Over: FAIRFAX CREEK

50 FT W OF ARROYO RD, Marin, CA

Built 1930 Load: 16.8 t ADT: 255

MARSH CREEK RD

Fair

Over: MARSH CREEK

7.3 MI E MORGAN TERITY RD, Contra Costa, CA

Built 1934 Load: 16.8 t ADT: 5,588

DIABLO RD

Fair

Over: GREEN VALLEY CREEK

0.5 MI E/O I-680, Contra Costa, CA

Built 1953 Load: 16.8 t ADT: 18,463

LAMMERS ROAD

Fair

Over: DELTA-MENDOTA CANAL

0.8 MI S VALPICO ROAD, San Joaquin, CA

Built 1950 Load: 16.8 t ADT: 1,439

HOGAN DAM RD

Fair

Over: COSGROVE CREEK

0.2 MI E/O SR 26, Calaveras, CA

Built 1941 Load: 16.8 t ADT: 1,089

MAIN ST

Fair

Over: SAN ANDREAS CREEK

IN SAN ANDREAS, Calaveras, CA

Built 1914 Load: 16.8 t ADT: 1,443

ITALIAN BAR RD

Fair

Over: EAGLE CREEK

11.9 MI NE BIG HILL ROAD, Tuolumne, CA

Built 1925 Load: 16.8 t ADT: 20

DECOTO ROAD

Fair

Over: ALAMEDA CREEK TRIBUTARY

JUST S/O NILES BLVD, Alameda, CA

Built 1920 Load: 16.8 t ADT: 35,700

PARK BOULEVARD

Fair

Over: HILLSIDE

0.5 MI S OF SR 13, Alameda, CA

Built 1932 Load: 16.8 t ADT: 18,753

PARK BOULEVARD

Fair

Over: HILLSIDE

0.4 MI SW OF SR 13, Alameda, CA

Built 1932 Load: 16.8 t ADT: 18,753

LEIMERT BLVD

Fair

Over: SAUSAL CREEK

0.1 MI E OF PARK BLVD, Alameda, CA

Built 1926 Load: 16.8 t ADT: 7,335

FOOTHILL BLVD

Fair

Over: SAN LORENZO CREEK

150 FT SE CITY CENTER DR, Alameda, CA

Built 1909 Load: 16.8 t ADT: 50,000

TREASURE ISLAND RD

Fair

Over: SIDEHILL

JNO TREAS ISLAND SHV #8, San Francisco, CA

Built 1938 Load: 16.8 t ADT: 3,000

BAYSHORE BLVD

Fair

Over: RECREATIONAL TRAIL

0.2 MI. N. OF VALLEY DR., San Mateo, CA

Built 1928 Load: 16.8 t ADT: 35,000

DRAKE AVE

Fair

Over: SANCHEZ CREEK

EAST OF CARMELITA, San Mateo, CA

Built 1930 Load: 16.8 t ADT: 100

APTOS CREEK ROAD

Fair

Over: APTOS CREEK

FOREST OF NISENE MARKS SP, Santa Cruz, CA

Built 1955 Load: 16.8 t ADT: 200

PIERCE RD

Fair

Over: CALABAZAS CREEK

0.4 MI S/W SURREY LN, Santa Clara, CA

Built 1935 Load: 16.8 t ADT: 1,529

ALAMITOS ROAD

Fair

Over: HERBERT CREEK

0.7 MI W OF HICKS RD, Santa Clara, CA

Built 1956 Load: 16.8 t ADT: 170

OLD PAGE MILL ROAD

Fair

Over: MATADERO CREEK

.5 MI N/O I-280, Santa Clara, CA

Built 1918 Load: 16.8 t ADT: 250

OLD PAGE MILL ROAD

Fair

Over: MATADERO CREEK

0.6 MI N/O I-280, Santa Clara, CA

Built 1918 Load: 16.8 t ADT: 205

STATE ROUTE 33

Fair

Over: SALADO CREEK

10-STA-033-13.94, Stanislaus, CA

Built 1915 Load: 16.8 t ADT: 6,450

HOPPER ROAD

Fair

Over: M.I.D. MAIN CANAL

0.5 MI N/O SR 132, Stanislaus, CA

Built 1929 Load: 16.8 t ADT: 425

OAK AVENUE

Fair

Over: SOUTH SLOUGH

0.8 MI E OF QUINLEY AVE, Merced, CA

Built 1935 Load: 16.8 t ADT: 128

CENTER AVENUE

Fair

Over: DELTA-MENDOTA CANAL

0.6 MI S ALMOND DRIVE, Merced, CA

Built 1950 Load: 16.8 t ADT: 660

HORNITOS ROAD

Fair

Over: BEAR CREEK

3.6 MI N OF SR 140, Mariposa, CA

Built 1948 Load: 16.8 t ADT: 350

SCHOOL HOUSE ROAD

Fair

Over: OWENS CREEK

0.9 MI SE OF SR 140, Mariposa, CA

Built 1936 Load: 16.8 t ADT: 380

OLD HIGHWAY

Fair

Over: OWENS CREEK

0.3 MI EAST OF SR 140, Mariposa, CA

Built 1920 Load: 16.8 t ADT: 100

S GOLDEN STATE BL

Fair

Over: FOWLER SWITCH CANAL

0.2 MI N OF DINUBA AVE, Fresno, CA

Built 1912 Load: 16.8 t ADT: 4,000

N RUSSELL AVE

Fair

Over: DELTA-MENDOTA CANAL

AT ALTHEA AVE, Fresno, CA

Built 1950 Load: 16.8 t ADT: 1,700

S CRAWFORD AVE

Fair

Over: FRIANT-KERN CANAL

1.85 MI SOUTH OF SR 180, Fresno, CA

Built 1955 Load: 16.8 t ADT: 200

N DEL REY AVE

Fair

Over: GOULD CANAL

0.5 MI SOUTH OF SHIELDS, Fresno, CA

Built 1950 Load: 16.8 t ADT: 1,200

E FLUME RD

Fair

Over: FRESNO CANAL

0.3 MI N OF TRIMMER SPR R, Fresno, CA

Built 1940 Load: 16.8 t ADT: 200

S FATIMA AVE

Fair

Over: MURPHY SLOUGH

0.05 MI N/O RIVERDALE AVE, Fresno, CA

Built 1948 Load: 16.8 t ADT: 200

N JAMESON AVE

Fair

Over: HERNDON CANAL

0.01 MI NORTH OF BARSTOW, Fresno, CA

Built 1938 Load: 16.8 t ADT: 200

S HILL AVE

Fair

Over: ALTA EAST BRANCH CANAL

0.7 MI N OF MANNING AVE, Fresno, CA

Built 1940 Load: 16.8 t ADT: 2,900

E AMERICAN AVE

Fair

Over: NO NAME DITCH

0.6 MI WEST OF SR 63, Fresno, CA

Built 1925 Load: 16.8 t ADT: 1,600

E HUNTSMAN AVE

Fair

Over: WRISTEN CANAL

0.21 MI W/O TEMPERANCE AV, Fresno, CA

Built 1939 Load: 16.8 t ADT: 400

PANOCHE ROAD

Fair

Over: PANOCHE CREEK

2 MI W LITTLE PANOCHE RD, San Benito, CA

Built 1946 Load: 16.8 t ADT: 800

SALINAS ST

Fair

Over: TEMBLADERO SLOUGH

0.15 MI S SR 183, Monterey, CA

Built 1942 Load: 16.8 t ADT: 200

SAN JUAN GRADE RD

Fair

Over: GABILAN CREEK

1 MI N OF CRAZY HORSE RD, Monterey, CA

Built 1940 Load: 16.8 t ADT: 630

SAN JUAN GRADE RD

Fair

Over: N GABILAN CREEK

1.5 MI N CRAZY HORSE RD, Monterey, CA

Built 1940 Load: 16.8 t ADT: 630

MAIN STREET

Fair

Over: PORTER SLOUGH

0.1 MI N OF E OLIVE ST, Tulare, CA

Built 1924 Load: 16.8 t ADT: 9,500

AVE 96 (TERRA BEL)

Fair

Over: FRIANT-KERN CANAL

0.05 MI EAST OF ROAD 208, Tulare, CA

Built 1949 Load: 16.8 t ADT: 385

AVE 196 (CR J28)

Fair

Over: FRIANT-KERN CANAL

0.2 MI WEST OF ROAD 236, Tulare, CA

Built 1949 Load: 16.8 t ADT: 2,650

M375A MNRL KING RD

Fair

Over: EAST FORK KAWEAH RIVER

6.68 MI E OF SR 198, Tulare, CA

Built 1923 Load: 16.8 t ADT: 25

CARROLL CRK RD

Fair

Over: LOS ANGELES AQUEDUCT

0.4 MI W OF RTE 395 JCT, Inyo, CA

Built 1927 Load: 16.8 t ADT: 50

WALKER CREEK RD

Fair

Over: LOS ANGELES AQUEDUCT

0.5 MI W OF RTE 395 JCT, Inyo, CA

Built 1927 Load: 16.8 t ADT: 50

HI MOUNTAIN RD

Fair

Over: ARROYO GRANDE CREEK

1.5 MI E LOPEZ CYN RD, San Luis Obispo, CA

Built 1965 Load: 16.8 t ADT: 50

Showing 1,151-1,200 of 25,848 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

What to do with this

Use California's inventory picture to drill to a county or a specific span.

  • Browse counties in California and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. California Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.