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

U.S. HIGHWAY 101

Good

Over: LITTLE RIVER

01-HUM-101-R97.46, Humboldt, CA

Built 1964 Load: 32.4 t ADT: 10,500

U.S. HIGHWAY 101

Good

Over: REDWOOD CREEK

01-HUM-101-121.09, Humboldt, CA

Built 1988 Load: 32.4 t ADT: 3,750

U.S. HIGHWAY 101

Good

Over: LOST MAN CREEK

01-HUM-101-124.71, Humboldt, CA

Built 1986 Load: 32.4 t ADT: 3,700

STATE ROUTE 299

Good

Over: SOUTH FORK TRINITY RIVER

01-HUM-299-42.95, Humboldt, CA

Built 1988 Load: 32.4 t ADT: 4,400

STATE ROUTE 36

Good

Over: GRIZZLY CREEK

01-HUM-036-16.94, Humboldt, CA

Built 1996 Load: 32.4 t ADT: 1,650

U.S. HIGHWAY 101

Good

Over: NEWTON ROAD

01-HUM-101-33.22, Humboldt, CA

Built 1961 Load: 32.4 t ADT: 6,190

STATE ROUTE 36

Good

Over: VAN DUZEN RIVER

01-HUM-036-40.45, Humboldt, CA

Built 1981 Load: 32.4 t ADT: 1,000

STATE ROUTE 96

Good

Over: SUPPLY CREEK

01-HUM-096-11.62, Humboldt, CA

Built 1991 Load: 32.4 t ADT: 2,850

STATE ROUTE 96

Good

Over: MILL CREEK

01-HUM-096-R14.55, Humboldt, CA

Built 1993 Load: 32.4 t ADT: 1,505

U.S. HIGHWAY 101

Good

Over: SOUTH FORK EEL RIVER

01-HUM-101-R7.87, Humboldt, CA

Built 1969 Load: 32.4 t ADT: 5,700

STATE ROUTE 299

Good

Over: US HIGHWAY 101

01-HUM-299-0.01-ARC, Humboldt, CA

Built 1956 Load: 32.4 t ADT: 12,400

STATE ROUTE 299

Good

Over: WILLOW CREEK

01-HUM-299-35.55, Humboldt, CA

Built 1956 Load: 32.4 t ADT: 3,200

U.S. HIGHWAY 101

Good

Over: HOOKER CREEK ROAD

01-HUM-101-R16.51, Humboldt, CA

Built 1965 Load: 32.4 t ADT: 6,700

STATE ROUTE 299

Good

Over: HILLSIDE

01-HUM-299-R42.30, Humboldt, CA

Built 1966 Load: 32.4 t ADT: 4,400

STATE ROUTE 169

Good

Over: ROCK CHUTE CREEK

01-HUM-169-29.83, Humboldt, CA

Built 1991 Load: 32.4 t ADT: 320

US HIGHWAY 101 NB

Good

Over: EEL RIV EDWARDS DR NCRRA

01-HUM-101-R51.99, Humboldt, CA

Built 1976 Load: 32.4 t ADT: 5,500

STATE ROUTE 255

Good

Over: MAD RIVER SLOUGH

01-HUM-255-R5.13, Humboldt, CA

Built 1981 Load: 32.4 t ADT: 4,300

HERRICK AVE

Good

Over: US HIGHWAY 101

01-HUM-101-74.77, Humboldt, CA

Built 1984 Load: 32.4 t ADT: 5,000

STATE ROUTE 36

Good

Over: VAN DUZEN RIVER

01-HUM-036-17.94, Humboldt, CA

Built 1985 Load: 32.4 t ADT: 1,650

SANDY PRAIRIE ROAD

Good

Over: VAN DUZEN RIVER OVERFLOW

01-HUM-000-0.00, Humboldt, CA

Built 2009 Load: 32.4 t ADT: 30

STATE ROUTE 254

Good

Over: HILLSIDE

01-HUM-254-11.83, Humboldt, CA

Built 1989 Load: 32.4 t ADT: 565

STATE ROUTE 36

Good

Over: VAN DUZEN RIVER

01-HUM-036-R23.91, Humboldt, CA

Built 1997 Load: 32.4 t ADT: 1,200

STATE ROUTE 96

Good

Over: HOSTLER CREEK

01-HUM-096-R13.26, Humboldt, CA

Built 1992 Load: 32.4 t ADT: 1,505

STATE ROUTE 254

Good

Over: HILLSIDE

01-HUM-254-17.80-STPK, Humboldt, CA

Built 1995 Load: 32.4 t ADT: 565

STATE ROUTE 36

Good

Over: US HIGHWAY 101

01-HUM-036-0.01, Humboldt, CA

Built 2010 Load: 32.4 t ADT: 4,000

STATE ROUTE 169

Good

Over: MAWAH CREEK

01-HUM-169-24.98, Humboldt, CA

Built 2012 Load: 32.4 t ADT: 2,000

STATE ROUTE 169

Good

Over: RUBE RANCH CREEK

01-HUM-169-28.49, Humboldt, CA

Built 2012 Load: 32.4 t ADT: 2,000

STATE ROUTE 169

Good

Over: MARTINS FERRY SCHOOL CRK

01-HUM-169-29.95, Humboldt, CA

Built 2012 Load: 32.4 t ADT: 345

US HIGHWAY 101 SB

Good

Over: MAD RIVER

01-HUM-101-89.63, Humboldt, CA

Built 2011 Load: 32.4 t ADT: 18,500

U.S. HIGHWAY 101

Good

Over: LITTLE LOST MAN CREEK

01-HUM-101-124.48, Humboldt, CA

Built 2020 Load: 32.4 t ADT: 4,200

US HIGHWAY 101 SB

Good

Over: JACOBY CREEK

01-HUM-101-84.50-ARC, Humboldt, CA

Built 2022 Load: 32.4 t ADT: 18,125

LANPHERE ROAD

Good

Over: MAD RIVER SLOUGH

2.5 MI WEST OF SR 101, Humboldt, CA

Built 1988 Load: 32.4 t ADT: 45

ELK RIVER ROAD

Good

Over: MARTIN SLOUGH

0.2 MI SE OF SR 101, Humboldt, CA

Built 1992 Load: 32.4 t ADT: 4,801

GLENDALE DR

Good

Over: LINDSAY CREEK

JUST NW OF FIELDBROOK RD, Humboldt, CA

Built 1995 Load: 32.4 t ADT: 1,520

GOLDEN GATE DR

Good

Over: VAN DUZEN RIVER

0.5 MI S OF SR 36, Humboldt, CA

Built 1985 Load: 32.4 t ADT: 58

WHITLOW RD

Good

Over: SONOMA CREEK

1 MI N OF SEQUOIA RD, Humboldt, CA

Built 1986 Load: 32.4 t ADT: 53

KINGS PEAK ROAD

Good

Over: NORTH FORK BEAR CREEK

2 MI S/O WILDER RIDGE RD, Humboldt, CA

Built 1993 Load: 32.4 t ADT: 75

BEAR RIVER ROAD

Good

Over: BONANZA GULCH

8.5 MI S OF MATTOLE RD, Humboldt, CA

Built 1986 Load: 32.4 t ADT: 15

MATTOLE ROAD

Good

Over: DAVIS CREEK

7.2 MI NW OF PETROLIA, Humboldt, CA

Built 1998 Load: 32.4 t ADT: 700

OLD ARCATA RD

Good

Over: JACOBY CREEK

1/4 MI N BAYSIDE CUTOFF, Humboldt, CA

Built 1988 Load: 32.4 t ADT: 3,030

MAPLE HILLS ROAD

Good

Over: SALMON CREEK

JUST S/O SALMON CREEK RD, Humboldt, CA

Built 1982 Load: 32.4 t ADT: 349

DEVOY RD

Good

Over: FRESHWATER SLOUGH

AT MYRTLE AVE, Humboldt, CA

Built 1986 Load: 32.4 t ADT: 24

MYRTLE AVE

Good

Over: FRESHWATER CR OVERFLOW

0.4 MI W OF KNEELAND RD, Humboldt, CA

Built 1984 Load: 32.4 t ADT: 6,908

RED CAP ROAD

Good

Over: BOISE CREEK

3.7 MILE S. OF SR 96, Humboldt, CA

Built 1995 Load: 32.4 t ADT: 91

PRICE CREEK ROAD

Good

Over: PRICE CREEK

0.9 MI W BLUE SLIDE ROAD, Humboldt, CA

Built 1996 Load: 32.4 t ADT: 67

LIGHTHOUSE ROAD

Good

Over: MILL CREEK

1.5 MI SW OF MATTOLE RD, Humboldt, CA

Built 2003 Load: 32.4 t ADT: 3

MATTOLE ROAD

Good

Over: INDIAN CREEK

4.5 MI S/O PETROLIA, Humboldt, CA

Built 2010 Load: 32.4 t ADT: 240

RED CAP ROAD

Good

Over: BIG ROCK GULCH

0.3 MILES SW OF SR96, Humboldt, CA

Built 2019 Load: 32.4 t ADT: 425

PORT KENYON ROAD

Good

Over: FRANCIS CREEK

0.5 MI W OF MAIN STREET, Humboldt, CA

Built 2015 Load: 32.4 t ADT: 500

STATE ROUTE 299

Good

Over: TRINITY RIVER

02-TRI-299-13.87, Trinity, CA

Built 1985 Load: 32.4 t ADT: 2,650

Showing 16,251-16,300 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.