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

STATE ROUTE 1 NB

Unknown

Over: SOUTHGATE AVENUE

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

Built 1968 ADT: 13,300

INTERSTATE 280 SB

Unknown

Over: STATE ROUTE 92

04-SM-280-10.81, San Mateo, CA

Built 1973 ADT: 22,200

INTERSTATE 280 NB

Unknown

Over: STATE ROUTE 92

04-SM-280-10.81, San Mateo, CA

Built 1973 ADT: 72,000

N280-W92 CONNECTOR

Unknown

Over: INTERSTATE 280, SR 92

04-SM-280-10.91, San Mateo, CA

Built 1974 ADT: 111,000

S280-E92 CONNECTOR

Unknown

Over: INTERSTATE 280, SR 92

04-SM-280-10.80, San Mateo, CA

Built 1973 ADT: 111,000

INTERSTATE 280 SB

Unknown

Over: EDGEWOOD ROAD

04-SM-280-6.65, San Mateo, CA

Built 1973 ADT: 3,500

INTERSTATE 280 NB

Unknown

Over: EDGEWOOD ROAD

04-SM-280-6.65, San Mateo, CA

Built 1973 ADT: 3,500

PEDESTRIAN WALKWAY

Unknown

Over: STATE ROUTE 84

04-SM-084-25.13-RDWC, San Mateo, CA

Built 1967 ADT: 43,000

SR 92 WB & RAMPS

Unknown

Over: U.S. 101, MARINA LAGOON

04-SM-092-R11.78-SM, San Mateo, CA

Built 1971 ADT: 9,930

SR 92 EB & RAMPS

Unknown

Over: U.S. 101, MARINA LAGOON

04-SM-092-R11.78-SM, San Mateo, CA

Built 1971 ADT: 4,610

INTERSTATE 380

Unknown

Over: CALTRAIN,UP RR,BART,ETC

04-SM-380-5.73-SBR, San Mateo, CA

Built 1971 ADT: 13,100

E380-N101 CONNECTR

Unknown

Over: I 380,US 101, RAMPS, 7TH

04-SM-380-6.37-SBR, San Mateo, CA

Built 1976 ADT: 11,000

INTERSTATE 380 WB

Unknown

Over: US 101, RAMPS, CITY ST

04-SM-380-6.33-SBR, San Mateo, CA

Built 1976 ADT: 188,000

INTERSTATE 380 EB

Unknown

Over: US 101, RAMPS, CITY ST

04-SM-380-6.32-SBR, San Mateo, CA

Built 1976 ADT: 188,000

S101-W380 CONNECTR

Unknown

Over: 7TH AVENUE

04-SM-101-R20.65-SBR, San Mateo, CA

Built 1976 ADT: 4,500

INTERSTATE 380 WB

Unknown

Over: 7TH AVENUE

04-SM-380-6.20-SBR, San Mateo, CA

Built 1976 ADT: 11,000

INTERSTATE 380 EB

Unknown

Over: 7TH AVENUE

04-SM-380-6.20-SBR, San Mateo, CA

Built 1976 ADT: 11,000

N101-W380 CONNECTR

Unknown

Over: I 380, US 101, 7TH, CONN

04-SM-101-R20.52, San Mateo, CA

Built 1976 ADT: 60,000

E380-S101 CONNECTR

Unknown

Over: S101-SAN BRUNO AV,7TH AV

04-SM-380-6.19-SBR, San Mateo, CA

Built 1976 ADT: 11,950

SAN BRUNO AVENUE

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-R20.39-SBR, San Mateo, CA

Built 1976 ADT: 55,000

W380-N&S101 CONN

Unknown

Over: US 101,I 380,EB CON,RMPS

04-SM-380-6.40-SBR, San Mateo, CA

Built 1976 ADT: 20,400

N&S101-E380 CNNCTR

Unknown

Over: US 101, RMPS, NORTH CHNL

04-SM-101-R20.69-SBR, San Mateo, CA

Built 1976 ADT: 248,000

SFO AIRPRT-S101 ON

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-19.09, San Mateo, CA

Built 1987 ADT: 8,000

S101-SFO AIRPT OFF

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-19.26, San Mateo, CA

Built 1987 ADT: 16,900

INTERSTATE 280 SB

Unknown

Over: CANADA ROAD

04-SM-280-R6.60, San Mateo, CA

Built 1973 ADT: 3,700

INTERSTATE 280 NB

Unknown

Over: CANADA ROAD

04-SM-280-R6.60, San Mateo, CA

Built 1973 ADT: 3,700

MARINERS ISLAND BL

Unknown

Over: STATE ROUTE 92

04-SM-092-R12.78-SM, San Mateo, CA

Built 1977 ADT: 105,000

CRYSTAL SP BIKE OC

Unknown

Over: INTERSTATE 280

04-SM-280-10.56, San Mateo, CA

Built 1973 ADT: 109,000

SFO-W380 CONN RMP

Unknown

Over: N101-SAN BRUNO OFF-RAMP

04-SM-380-6.44, San Mateo, CA

Built 1987 ADT: 6,000

N280-S1 CONNECTOR

Unknown

Over: SOUTHGATE AVENUE

04-SM-280-R25.32-DLC, San Mateo, CA

Built 1968 ADT: 11,000

VINTAGE PARK DRIVE

Unknown

Over: STATE ROUTE 92

04-SM-092-R13.25-FSTC, San Mateo, CA

Built 1991 ADT: 105,000

D ST-S280&S1 ONRMP

Unknown

Over: I 280, SULLIVAN-S280 RMP

04-SM-280-R25.60-DLC, San Mateo, CA

Built 1993 ADT: 221,000

OYSTER POINT BLVD

Unknown

Over: US HIGHWAY 101

04-SM-101-22.82-SSF, San Mateo, CA

Built 1994 ADT: 196,000

S101-OYSTER POINT

Unknown

Over: US HIGHWAY 101

04-SM-101-22.78, San Mateo, CA

Built 2004 ADT: 6,000

OYSTER POINT-S101

Unknown

Over: US HIGHWAY 101

04-SM-101-22.70-SSF, San Mateo, CA

Built 1995 ADT: 219,000

BART TRACKS

Unknown

Over: STATE ROUTE 82

04-SM-082-23.00-CLM, San Mateo, CA

Built 1994 ADT: 28,500

S101-SFO AIRPT OFF

Unknown

Over: US 101, 2 AIRPRT-S101 ON

04-SM-101-19.12, San Mateo, CA

Built 2000 ADT: 248,000

SFO AIRPRT-S101 ON

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-19.29, San Mateo, CA

Built 2000 ADT: 235,000

N101-SFO ARPRT OFF

Unknown

Over: MILLBRAE AV-N101 ON RAMP

04-SM-101-18.54, San Mateo, CA

Built 2000 ADT: 8,000

UTILITIES/PIPES

Unknown

Over: INTERSTATE 280

04-SM-280-R25.87-DLC, San Mateo, CA

Built 1998 ADT: 5,000

BART

Unknown

Over: US101, I-380 AIRPRT RMPS

04-SM-101-19.30, San Mateo, CA

Built 2001 ADT: 248,000

PEDESTRIAN WALKWAY

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-9.72-BMT, San Mateo, CA

Built 2009 ADT: 236,000

ISLAND PARKWAY

Unknown

Over: MARINE PKWY TO NB 101

04-SM-101-9.60-RDWC, San Mateo, CA

Built 2004 ADT: 5,000

PEDESTRIAN WALKWAY

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-16.53-BURL, San Mateo, CA

Built 2009 ADT: 15,000

PEDESTRIAN WALKWAY

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-13.95-SM, San Mateo, CA

Built 2009 ADT: 232,000

PEDESTRIAN WALKWAY

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-2.57-MLP, San Mateo, CA

Built 2012 ADT: 199,000

PENINSULA AVENUE

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-14.69-SM, San Mateo, CA

Built 2010 ADT: 232,000

BROADWAY AVE

Unknown

Over: U.S. HIGHWAY 101

04-SM-101-16.61-BURL, San Mateo, CA

Built 2016 ADT: 226,000

PEDESTRIAN WALKWAY

Unknown

Over: U.S. HIGHWAY 101,E FRONT

04-SM-101-0.47-EAPA, San Mateo, CA

Built 2019 ADT: 25,000

STATE ROUTE 114

Unknown

Over: U.S. HWY 101, RAMPS

04-SM-114-5.00-EAPA, San Mateo, CA

Built 2019 ADT: 207,900

Showing 6,351-6,400 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.