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

S101 ON & OFF RAMP

Unknown

Over: U.S. HIGHWAY 101

04-MRN-101-25.50, Marin, CA

Built 2006 ADT: 80,000

PEDESTRIAN BIKEWAY

Unknown

Over: LINDEN LANE

04-MRN-000-0.00, Marin, CA

Built 2010 ADT: 7,500

PEDESTRIAN WALKWAY

Unknown

Over: SIR FRANCIS DRAKE BLVD

1.4 MI W OF SR 101, Marin, CA

Built 1968 ADT: 10,000

PEDESTRIAN WALKWAY

Unknown

Over: PARADISE DRIVE

INTX UPLAND CIRCLE INTRX, Marin, CA

Built 1970 ADT: 2,730

BIKE PATH

Unknown

Over: BELLAM BLVD

UNDER U.S. HIGHWAY 101, Marin, CA

Built 1930 ADT: 2,500

PEDESTRIAN WALKWAY

Unknown

Over: NICASIO VALLEY RD

0.15 MI N SIR FRNCS DK B2, Marin, CA

Built 1960 ADT: 1,330

PEDESTRIAN WALKWAY

Unknown

Over: SIR FRANCIS DRAKE BLVD

1/4 MI E OF US 101, Marin, CA

Built 1981 ADT: 10,000

BIKE PATH

Unknown

Over: SIR FRANCIS DRAKE BLVD

SAM P TAYLOR STATE PARK, Marin, CA

Built 1980 ADT: 2,500

EL ROBLE OC

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-19.68, Mendocino, CA

Built 1963 ADT: 14,100

ROBINSON OC

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-20.71, Mendocino, CA

Built 1963 ADT: 14,700

US HIGHWAY 101 S

Unknown

Over: ROUTE 20

01-MEN-101-T43.76, Mendocino, CA

Built 2016 ADT: 10,400

US HIGHWAY 101 N

Unknown

Over: ROUTE 20

01-MEN-101-T43.75, Mendocino, CA

Built 2016 ADT: 10,400

STATE ROUTE 271

Unknown

Over: U.S. 101 (@ PM R89.56)

01-MEN-271-5.58, Mendocino, CA

Built 1970 ADT: 6,100

US HIGHWAY 101

Unknown

Over: EAST HILL ROAD

01-MEN-101-44.99, Mendocino, CA

Built 2016 ADT: 1,000

US HIGHWAY 101

Unknown

Over: HAEHL,BAECHTL,CV RD,C ST

01-MEN-101-46.43-WLTS, Mendocino, CA

Built 2016 ADT: 1,000

US HIGHWAY 101

Unknown

Over: QUAIL MEADOWS ROAD

01-MEN-101-48.12, Mendocino, CA

Built 2016 ADT: 1,000

STATE ROUTE 20

Unknown

Over: EAST ROAD

01-MEN-020-33.77, Mendocino, CA

Built 1958 ADT: 250

TREATMENT PLANT RD

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-R21.80, Mendocino, CA

Built 1964 ADT: 16,700

STATE ROUTE 253

Unknown

Over: U.S. 101 (@ PM R21.59)

01-MEN-253-17.16, Mendocino, CA

Built 1964 ADT: 14,700

OAK MANOR SCH POC

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-R24.30-UKI, Mendocino, CA

Built 1968 ADT: 20,900

SR 222 (TALMADGE)

Unknown

Over: U.S. 101 (@ PM R23.45)

01-MEN-222-L0.50, Mendocino, CA

Built 1964 ADT: 20,900

E GOBBI ST

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-R24.06-UKI, Mendocino, CA

Built 1964 ADT: 20,900

EAST PERKINS ST

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-R24.53-UKI, Mendocino, CA

Built 1964 ADT: 20,900

US HIGHWAY 101 SB

Unknown

Over: NORTH STATE STREET

01-MEN-101-R26.16, Mendocino, CA

Built 1964 ADT: 9,300

US 101 NB

Unknown

Over: NORTH STATE STREET

01-MEN-101-R26.16, Mendocino, CA

Built 1964 ADT: 9,300

MASONITE ROAD

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-26.37, Mendocino, CA

Built 1962 ADT: 27,500

ORR SPRINGS ROAD

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-26.39, Mendocino, CA

Built 1962 ADT: 27,500

US HIGHWAY 101 SB

Unknown

Over: LAKE MENDOCINO DR

01-MEN-101-27.41, Mendocino, CA

Built 1962 ADT: 1,200

US HIGHWAY 101 NB

Unknown

Over: LAKE MENDOCINO DR

01-MEN-101-27.41, Mendocino, CA

Built 1962 ADT: 1,200

PARDUCCI ROAD

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-27.92, Mendocino, CA

Built 1962 ADT: 24,600

US HIGHWAY 101 SB

Unknown

Over: MOORE STREET

01-MEN-101-30.43, Mendocino, CA

Built 1962 ADT: 650

US HIGHWAY 101 NB

Unknown

Over: MOORE STREET

01-MEN-101-30.43, Mendocino, CA

Built 1962 ADT: 650

US HIGHWAY 101 SB

Unknown

Over: ST RTE 20 (@ PM 33.22)

01-MEN-101-30.82, Mendocino, CA

Built 1962 ADT: 11,500

US HIGHWAY 101 NB

Unknown

Over: ST RTE 20 (@ PM 33.22)

01-MEN-101-30.82, Mendocino, CA

Built 1962 ADT: 11,500

NORTH STATE ST

Unknown

Over: STATE ROUTE 20

01-MEN-020-33.31, Mendocino, CA

Built 1962 ADT: 11,500

CENTRAL AVE

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-29.84, Mendocino, CA

Built 1962 ADT: 24,600

NORTH STATE ST

Unknown

Over: W20-N101 CONNECTOR RAMP

01-MEN-020-33.32, Mendocino, CA

Built 1962 ADT: 2,875

STATE ROUTE 271

Unknown

Over: U.S. 101 (@ PM R101.90)

01-MEN-271-17.03, Mendocino, CA

Built 1976 ADT: 6,100

WEST ROAD

Unknown

Over: U.S. HIGHWAY 101

01-MEN-101-R32.63, Mendocino, CA

Built 1990 ADT: 19,000

BUHACH ROAD

Unknown

Over: ST RTE 99, RAMPS & UP RR

10-MER-099-20.52, Merced, CA

Built 1957 ADT: 39,000

FRANKLIN RD

Unknown

Over: STATE ROUTE 99

10-MER-099-18.51, Merced, CA

Built 1962 ADT: 56,000

STATE ROUTE 99 SB

Unknown

Over: ATWATER BL, UP RR, SP AV

10-MER-099-21.61, Merced, CA

Built 1957 ADT: 100

STATE ROUTE 99 NB

Unknown

Over: ATWATER BL, UP RR, SP AV

10-MER-099-21.61, Merced, CA

Built 1957 ADT: 1,500

APPLEGATE ROAD

Unknown

Over: STATE ROUTE 99 & RAMPS

10-MER-099-22.76-ATW, Merced, CA

Built 1957 ADT: 37,000

STATE ROUTE 99 SB

Unknown

Over: ATWATER BLVD & UP RR

10-MER-099-23.47-ATW, Merced, CA

Built 1957 ADT: 500

STATE ROUTE 99 NB

Unknown

Over: ATWATER BLVD & UP RR

10-MER-099-23.46-ATW, Merced, CA

Built 1957 ADT: 500

STATE ROUTE 99 SB

Unknown

Over: L STREET

10-MER-099-14.87-MER, Merced, CA

Built 1962 ADT: 1,500

STATE ROUTE 99 NB

Unknown

Over: L STREET

10-MER-099-14.87-MER, Merced, CA

Built 1962 ADT: 1,500

STATE ROUTE 99 SB

Unknown

Over: M STREET

10-MER-099-14.96-MER, Merced, CA

Built 1962 ADT: 1,500

STATE ROUTE 99 NB

Unknown

Over: M STREET

10-MER-099-14.96-MER, Merced, CA

Built 1962 ADT: 1,500

Showing 3,251-3,300 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.