State profile · Below median Poor share

California bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in California, based on the FHWA National Bridge Inventory.

27,040
Public bridges
32.5%
Good condition
4.6%
Poor condition

Data updated May 2026

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 whose lowest applicable component is rated 0-4

-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 - Poor-condition share 15.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

California45.2%48.3%GoodFairPoor
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 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.

OH

Ohio

4.54% top marginal rate
Structure
Progressive
Burden @ $100K
$26,753

NJ

New Jersey

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

CA

California

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

AR

Arkansas

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

WA

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 the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

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

Poor

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

SAND HILL ROAD (N)

Unknown

Over: INTERSTATE 280

04-SM-280-R1.61, San Mateo, CA

Built 1969 ADT: 101,000

I-280 SOUTHBOUND

Unknown

Over: ALPINE RD & LOS TRANCOS

04-SM-280-R0.01, San Mateo, CA

Built 1969 ADT: 3,500

I-280 NORTHBOUND

Unknown

Over: ALPINE RD & LOS TRANCOS

04-SM-280-R0.01, San Mateo, CA

Built 1969 ADT: 3,500

CALTRAIN & UP RR

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-3.05-MLP, San Mateo, CA

Built 1931 ADT: 199,000

MANOR DRIVE

Unknown

Over: STATE ROUTE 1

04-SM-001-R45.12-PFA, San Mateo, CA

Built 1965 ADT: 32,500

THIRD AVENUE

Unknown

Over: US HIGHWAY 101

04-SM-101-13.46-SM, San Mateo, CA

Built 1953 ADT: 20,000

FASHION ISLAND BL

Unknown

Over: US HIGHWAY 101

04-SM-101-11.90-SM, San Mateo, CA

Built 1985 ADT: 236,000

HOLLY STREET

Unknown

Over: US HIGHWAY 101

04-SM-101-8.40, San Mateo, CA

Built 1954 ADT: 20,000

BUNKER HILL DRIVE

Unknown

Over: INTERSTATE 280

04-SM-280-R12.32, San Mateo, CA

Built 1969 ADT: 111,000

W380-N280 CONNECTR

Unknown

Over: N280 ON-RAMP COLLECTOR

04-SM-380-T4.71, San Mateo, CA

Built 1971 ADT: 15,000

S101-S84 CONNECTOR

Unknown

Over: UP RR SPUR & VETERANS BL

04-SM-101-5.50-RDWC, San Mateo, CA

Built 1972 ADT: 22,600

SR 84 (MARSH RD)

Unknown

Over: US HIGHWAY 101

04-SM-084-R25.81-MLP, San Mateo, CA

Built 1998 ADT: 199,000

N101-S84 CONNECTOR

Unknown

Over: WOODSIDE ROAD

04-SM-101-5.39-RDWC, San Mateo, CA

Built 1958 ADT: 1,210

U.S. HIGHWAY 101

Unknown

Over: SR 84 (WOODSIDE ROAD)

04-SM-101-5.39-RDWC, San Mateo, CA

Built 1958 ADT: 43,000

MAPLE STREET

Unknown

Over: US HIGHWAY 101

04-SM-101-5.88-RDWC, San Mateo, CA

Built 1958 ADT: 195,000

MILLBRAE AVENUE

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-17.95-MLBR, San Mateo, CA

Built 1947 ADT: 226,000

STATE ROUTE 84

Unknown

Over: SR 82 - EL CAMINO REAL

04-SM-084-24.68-RDWC, San Mateo, CA

Built 1965 ADT: 35,250

US HIGHWAY 101 SB

Unknown

Over: CALTRAIN,UP RR,GRAND,ONR

04-SM-101-21.92-SSF, San Mateo, CA

Built 1948 ADT: 18,600

US HIGHWAY 101 NB

Unknown

Over: CALTRAIN,UP RR,GRAND,ONR

04-SM-101-21.92-SSF, San Mateo, CA

Built 1948 ADT: 95,100

UNIVERSITY AVE NB

Unknown

Over: US HIGHWAY 101

04-SM-101-0.88-EAPA, San Mateo, CA

Built 1958 ADT: 199,000

RALSTON AVENUE

Unknown

Over: US HIGHWAY 101

04-SM-101-9.55-BMT, San Mateo, CA

Built 1974 ADT: 195,000

INTERSTATE 280 SB

Unknown

Over: HICKEY BOULEVARD

04-SM-280-R24.20-DLC, San Mateo, CA

Built 1967 ADT: 22,200

INTERSTATE 280 NB

Unknown

Over: HICKEY BOULEVARD

04-SM-280-R24.20-DLC, San Mateo, CA

Built 1967 ADT: 22,200

U.S. HIGHWAY 101

Unknown

Over: AIRPORT BOULEVARD

04-SM-101-21.69-SSF, San Mateo, CA

Built 1947 ADT: 9,280

WHIPPLE AVENUE

Unknown

Over: US HIGHWAY 101

04-SM-101-6.62-RDWC, San Mateo, CA

Built 1958 ADT: 195,000

N101-BAYSHORE OFF

Unknown

Over: US HIGHWAY 101

04-SM-101-23.39-SSF, San Mateo, CA

Built 1957 ADT: 219,000

EAST HILLSDALE BL

Unknown

Over: US HIGHWAY 101

04-SM-101-11.15-SM, San Mateo, CA

Built 1954 ADT: 15,000

UNIVERSITY AVE SB

Unknown

Over: US HIGHWAY 101

04-SM-101-0.89-EAPA, San Mateo, CA

Built 1958 ADT: 199,000

WB STATE ROUTE 92

Unknown

Over: STATE ROUTE 82

04-SM-092-R11.19-SM, San Mateo, CA

Built 1963 ADT: 32,000

EB STATE ROUTE 92

Unknown

Over: STATE ROUTE 82

04-SM-092-R11.19-SM, San Mateo, CA

Built 1963 ADT: 32,000

WB STATE ROUTE 92

Unknown

Over: CALTRAIN,UP RR,PACIFIC,

04-SM-092-R11.38-SM, San Mateo, CA

Built 1963 ADT: 300

EB STATE ROUTE 92

Unknown

Over: CALTRAIN,UP RR,PACIFIC,

04-SM-092-R11.38-SM, San Mateo, CA

Built 1963 ADT: 300

WB STATE ROUTE 92

Unknown

Over: DELAWARE STREET

04-SM-092-R11.61-SM, San Mateo, CA

Built 1963 ADT: 400

EB STATE ROUTE 92

Unknown

Over: DELAWARE STREET

04-SM-092-R11.61-SM, San Mateo, CA

Built 1963 ADT: 300

STATE ROUTE 92

Unknown

Over: PALM AVENUE

04-SM-092-R11.30-SM, San Mateo, CA

Built 1963 ADT: 6,460

ALAMEDA DE LAS PUL

Unknown

Over: STATE ROUTE 92

04-SM-092-R10.56-SM, San Mateo, CA

Built 1963 ADT: 72,000

STATE ROUTE 92

Unknown

Over: WEST HILLSDALE BLVD

04-SM-092-R9.38-SM, San Mateo, CA

Built 1967 ADT: 33,000

SHARP PARK ROAD

Unknown

Over: STATE ROUTE 1

04-SM-001-R43.46-PFA, San Mateo, CA

Built 1965 ADT: 32,500

JOHN DALY BLVD

Unknown

Over: INTERSTATE 280, SR 1

04-SM-280-M27.17L-DLC, San Mateo, CA

Built 1965 ADT: 141,000

S280-JUNIPERO SERR

Unknown

Over: INTERSTATE 280

04-SM-280-M27.20L-DLC, San Mateo, CA

Built 1965 ADT: 141,000

JUNIPERO SERRA-NB1

Unknown

Over: INTERSTATE 280

04-SM-001-R48.38-DLC, San Mateo, CA

Built 1965 ADT: 141,000

ST CHARLES AVENUE

Unknown

Over: INTERSTATE 280

04-SM-280-M27.41L-DLC, San Mateo, CA

Built 1965 ADT: 141,000

INTERSTATE 280

Unknown

Over: SOUTHGATE AVENUE

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

Built 1967 ADT: 11,000

N280-S1 CONNECTOR

Unknown

Over: I 280, SR 1, & CONNS

04-SM-280-R25.26-DLC, San Mateo, CA

Built 1967 ADT: 74,000

STATE ROUTE 1 NB

Unknown

Over: INTERSTATE 280

04-SM-001-R47.76-DLC, San Mateo, CA

Built 1967 ADT: 207,000

SAN PEDRO ROAD

Unknown

Over: INTERSTATE 280

04-SM-280-R25.78-DLC, San Mateo, CA

Built 1965 ADT: 221,000

JUNIPERO SERRA BL

Unknown

Over: INTERSTATE 280

04-SM-280-R26.04-DLC, San Mateo, CA

Built 1965 ADT: 207,000

SCHOOL STREET

Unknown

Over: INTERSTATE 280

04-SM-280-R26.35-DLC, San Mateo, CA

Built 1965 ADT: 207,000

JUNIPERO SERRA BLV

Unknown

Over: INTERSTATE 280

04-SM-280-R26.50-DLC, San Mateo, CA

Built 1965 ADT: 207,000

WASHINGTON STREET

Unknown

Over: INTERSTATE 280

04-SM-280-R25.97-DLC, San Mateo, CA

Built 1965 ADT: 207,000

Showing 6,251-6,300 of 27,040 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.

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.