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

SULLIVAN-S280 ONRP

Unknown

Over: S280-S1 CONNECTOR RAMP

04-SM-280-R25.34-DLC, San Mateo, CA

Built 1967 ADT: 221,000

PALOMA AVENUE

Unknown

Over: STATE ROUTE 1

04-SM-001-R44.21-PFA, San Mateo, CA

Built 1965 ADT: 32,500

PEDESTRIAN WALKWAY

Unknown

Over: STATE ROUTE 1

04-SM-001-R44.88-PFA, San Mateo, CA

Built 1965 ADT: 32,500

FOSTER CITY BLVD

Unknown

Over: STATE ROUTE 92

04-SM-092-R13.61-FSTC, San Mateo, CA

Built 1967 ADT: 86,000

STATE ROUTE 1

Unknown

Over: GATEWAY DRIVE

04-SM-001-R46.51-DLC, San Mateo, CA

Built 1964 ADT: 7,990

INTERSTATE 280 SB

Unknown

Over: CRYSTAL SPRINGS OFF-RAMP

04-SM-280-R20.04-SBR, San Mateo, CA

Built 1967 ADT: 44,650

S280-CRYSTAL SP OR

Unknown

Over: WHITMAN WAY

04-SM-280-R20.22-SBR, San Mateo, CA

Built 1967 ADT: 15,000

INTERSTATE 280 SB

Unknown

Over: WHITMAN WAY

04-SM-280-R20.22-SBR, San Mateo, CA

Built 1967 ADT: 15,000

INTERSTATE 280 NB

Unknown

Over: WHITMAN WAY

04-SM-280-R20.22-SBR, San Mateo, CA

Built 1967 ADT: 15,000

HILLSDALE BLVD

Unknown

Over: STATE ROUTE 82

04-SM-082-9.35-SM, San Mateo, CA

Built 1965 ADT: 37,000

N280-N35 CNNTR RMP

Unknown

Over: INTERSTATE 280

04-SM-035-L23.00-SBR, San Mateo, CA

Built 1967 ADT: 110,000

CRYSTAL SPRINGS RD

Unknown

Over: INTERSTATE 280

04-SM-280-R19.36-SBR, San Mateo, CA

Built 1967 ADT: 111,000

INTERSTATE 280 SB

Unknown

Over: KING DRIVE

04-SM-280-R23.16-DLC, San Mateo, CA

Built 1967 ADT: 6,610

INTERSTATE 280 NB

Unknown

Over: KING DRIVE

04-SM-280-R23.16-DLC, San Mateo, CA

Built 1967 ADT: 6,610

STATE ROUTE 92

Unknown

Over: DE ANZA BOULEVARD

04-SM-092-R8.67-SM, San Mateo, CA

Built 1967 ADT: 9,510

S1-S35 CONNECTOR

Unknown

Over: STATE ROUTE 1

04-SM-001-R46.65-DLC, San Mateo, CA

Built 1972 ADT: 43,500

SB STATE ROUTE 35

Unknown

Over: NB & SB RTE 1 AND RAMPS

04-SM-035-R28.66-DLC, San Mateo, CA

Built 1972 ADT: 25,000

NB STATE ROUTE 35

Unknown

Over: NB & SB RTE 1 AND RAMPS

04-SM-035-R28.66-DLC, San Mateo, CA

Built 1972 ADT: 43,500

RALSTON POLHEMUS R

Unknown

Over: STATE ROUTE 92

04-SM-092-R7.93, San Mateo, CA

Built 1967 ADT: 8,200

SB STATE RTE 280

Unknown

Over: SERRAMONTE BOULEVARD

04-SM-280-R24.63-DLC, San Mateo, CA

Built 1967 ADT: 15,400

NB STATE RTE 280

Unknown

Over: SERRAMONTE BOULEVARD

04-SM-280-R24.63-DLC, San Mateo, CA

Built 1967 ADT: 15,400

STATE ROUTE 280 SB

Unknown

Over: HAYNE ROAD

04-SM-280-R14.22-HIL, San Mateo, CA

Built 1969 ADT: 2,020

STATE ROUTE 280 NB

Unknown

Over: HAYNE ROAD

04-SM-280-R14.22-HIL, San Mateo, CA

Built 1969 ADT: 2,020

STATE ROUTE 280 SB

Unknown

Over: HILLCREST BOULEVARD

04-SM-280-R17.92-MLBR, San Mateo, CA

Built 1969 ADT: 3,500

STATE ROUTE 280 NB

Unknown

Over: HILLCREST BOULEVARD

04-SM-280-R17.92-MLBR, San Mateo, CA

Built 1969 ADT: 3,500

INTERSTATE 280 SB

Unknown

Over: WESTBOROUGH BLVD

04-SM-280-R22.62-SSF, San Mateo, CA

Built 1967 ADT: 8,500

INTERSTATE 280 NB

Unknown

Over: WESTBOROUGH BLVD

04-SM-280-R22.62-SSF, San Mateo, CA

Built 1967 ADT: 8,500

SB STATE RTE 280

Unknown

Over: LARKSPUR DRIVE

04-SM-280-R18.52-MLBR, San Mateo, CA

Built 1969 ADT: 8,500

NB STATE RTE 280

Unknown

Over: LARKSPUR DRIVE

04-SM-280-R18.52-MLBR, San Mateo, CA

Built 1969 ADT: 8,500

INTERSTATE 280

Unknown

Over: I 380 & S280-E380 CNNCTR

04-SM-280-R20.97-SBR, San Mateo, CA

Built 1971 ADT: 89,300

SAN BRUNO-N280 ONR

Unknown

Over: S280-E380 CONNECTOR RAMP

04-SM-280-R20.96-SBR, San Mateo, CA

Built 1971 ADT: 150,000

W380-S280 CONNECTR

Unknown

Over: I 280, CONN, FRNTGE RD

04-SM-380-4.65-SBR, San Mateo, CA

Built 1971 ADT: 156,000

WB RTE380 (FUTURE)

Unknown

Over: S280-E380 CONNECTOR RAMP

04-SM-380-4.67-SBR, San Mateo, CA

Built 1973 ADT: 43,500

EB RTE380 (FUTURE)

Unknown

Over: S280-E380 CONNECTOR RAMP

04-SM-380-4.67-SBR, San Mateo, CA

Built 1973 ADT: 43,500

INTERSTATE 380

Unknown

Over: SR 82 (EL CAMINO REAL)

04-SM-380-5.45-SBR, San Mateo, CA

Built 1971 ADT: 36,000

SNEATH LANE

Unknown

Over: INTERSTATE 280

04-SM-280-R21.30-SBR, San Mateo, CA

Built 1971 ADT: 101,000

INTERSTATE 380

Unknown

Over: CHERRY AVENUE

04-SM-380-T4.98-SBR, San Mateo, CA

Built 1971 ADT: 4,950

INTERSTATE 280

Unknown

Over: SAN BRUNO AVENUE

04-SM-280-R20.75-SBR, San Mateo, CA

Built 1971 ADT: 8,000

INTERSTATE 280 SB

Unknown

Over: AVALON DRIVE

04-SM-280-R22.04-SSF, San Mateo, CA

Built 1971 ADT: 19,000

INTERSTATE 280 NB

Unknown

Over: AVALON DRIVE

04-SM-280-R22.04-SSF, San Mateo, CA

Built 1971 ADT: 19,000

INTERSTATE 280

Unknown

Over: FARM HILL BOULEVARD

04-SM-280-R4.65-WDS, San Mateo, CA

Built 1969 ADT: 3,700

INTERSTATE 280 NB

Unknown

Over: FARM HILL BOULEVARD

04-SM-280-R4.65-WDS, San Mateo, CA

Built 1969 ADT: 3,700

INTERSTATE 280 SB

Unknown

Over: CANADA ROAD

04-SM-280-R4.99-WDS, San Mateo, CA

Built 1969 ADT: 3,700

INTERSTATE 280 NB

Unknown

Over: CANADA ROAD

04-SM-280-R4.99-WDS, San Mateo, CA

Built 1969 ADT: 3,700

INTERSTATE 280 SB

Unknown

Over: SR 84 (WOODSIDE EXP)

04-SM-280-R3.32-WDS, San Mateo, CA

Built 1969 ADT: 29,750

INTERSTATE 280 NB

Unknown

Over: SR 84 (WOODSIDE EXP)

04-SM-280-R3.32-WDS, San Mateo, CA

Built 1969 ADT: 30,000

STATE ROUTE 1

Unknown

Over: ST. FRANCIS BOULEVARD

04-SM-001-R47.03-DLC, San Mateo, CA

Built 1972 ADT: 4,630

STATE ROUTE 1

Unknown

Over: CLARINADA AVENUE

04-SM-001-R47.27-DLC, San Mateo, CA

Built 1968 ADT: 8,220

N1-S280 CONNECTOR

Unknown

Over: SOUTHGATE AVENUE

04-SM-001-R47.62-DLC, San Mateo, CA

Built 1968 ADT: 13,300

STATE ROUTE 1 SB

Unknown

Over: SOUTHGATE AVENUE

04-SM-001-R47.62-DLC, San Mateo, CA

Built 1968 ADT: 13,300

Showing 6,301-6,350 of 27,040 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
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.