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

Total Bridges

27,040

Public highway bridges in California

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)

California32.45931952662722%34.67455621301775%GoodFairPoorStructurally Deficient
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
Structure
Progressive
Burden @ $100K
$26,753

34

New Jersey

4.59% top marginal rate
Structure
Progressive
Burden @ $100K
$6,796
Selected

06

California

4.60% top marginal rate
Structure
Progressive
Burden @ $100K
$27,040

05

Arkansas

4.71% top marginal rate
Structure
Progressive
Burden @ $100K
$5,544

53

Washington

4.81% top marginal rate
Structure
Progressive
Burden @ $100K
$8,808

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

Poor

Over: FALL RIVER

0.5 MI N OF MCARTHUR RD, Shasta, CA

Built 1950 Load: 2.7 t ADT: 50

ORESTIMBA ROAD

Poor

Over: CCID MAIN CANAL

0.1 MI E DRAPER RD, Stanislaus, CA

Built 1919 Load: 2.9 t ADT: 684

CLARK STREET

Poor

Over: 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 Deficient

Over: MIDDLE FORK FEATHER RIV

0.2 MI S SH 70, Plumas, CA

Built 1954 Load: 3.2 t ADT: 10,046

AVENUE 10

Poor

Over: COTTONWOOD CREEK

JUST E/O ROAD 23, Madera, CA

Built 1950 Load: 3.6 t ADT: 50

S BISHOP AVE

Poor

Over: CRESCENT DITCH

0.64 MI S/O MT WHITNEY AV, Fresno, CA

Built 1950 Load: 3.9 t ADT: 125

All Bridges in California

ROAD 46

Good

Over: WALKER CREEK

0.2 MI WEST OF ROAD 19, Glenn, CA

Built 1989 Load: 32.4 t ADT: 5

ROAD 'D'

Good

Over: N FK LOGAN CREEK OVRFLOW

JUST NORTH OF RD #60, Glenn, CA

Built 1981 Load: 32.4 t ADT: 410

COUNTY ROAD 303

Good

Over: SOUTH FORK WILLOW CREEK

4.5 MI SOUTH OF ROAD 302, Glenn, CA

Built 2003 Load: 32.4 t ADT: 27

ROAD Z

Good

Over: CAMPBELL SLOUGH

1.5 MI N/O SR 162, Glenn, CA

Built 2011 Load: 32.4 t ADT: 586

US HIGHWAY 101 SB

Good

Over: EEL RIVER

01-HUM-101-M53.97-RDEL, Humboldt, CA

Built 1974 Load: 32.4 t ADT: 4,400

US HIGHWAY 101 SB

Good

Over: VAN DUZEN RIVER

01-HUM-101-56.84, Humboldt, CA

Built 2007 Load: 32.4 t ADT: 13,000

US HIGHWAY 101 NB

Good

Over: VAN DUZEN RIVER

01-HUM-101-56.84, Humboldt, CA

Built 1996 Load: 32.4 t ADT: 6,800

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: 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

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 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

Showing 20,401-20,450 of 27,040 bridges

Related

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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.