Total Bridges
27,040
Public highway bridges in California
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
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)
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
34
New Jersey
4.59% top marginal rate
06
California
4.60% top marginal rate
05
Arkansas
4.71% top marginal rate
53
Washington
4.81% top marginal rate
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
PoorOver: FALL RIVER
0.5 MI N OF MCARTHUR RD, Shasta, CA
Built 1950 Load: 2.7 t ADT: 50
ORESTIMBA ROAD
PoorOver: CCID MAIN CANAL
0.1 MI E DRAPER RD, Stanislaus, CA
Built 1919 Load: 2.9 t ADT: 684
CLARK STREET
PoorOver: 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 DeficientOver: MIDDLE FORK FEATHER RIV
0.2 MI S SH 70, Plumas, CA
Built 1954 Load: 3.2 t ADT: 10,046
AVENUE 10
PoorOver: COTTONWOOD CREEK
JUST E/O ROAD 23, Madera, CA
Built 1950 Load: 3.6 t ADT: 50
S BISHOP AVE
PoorOver: CRESCENT DITCH
0.64 MI S/O MT WHITNEY AV, Fresno, CA
Built 1950 Load: 3.9 t ADT: 125
All Bridges in California
INTERSTATE 40
GoodOver: LEMMING WASH
08-SBD-040-R140.11-NED, San Bernardino, CA
Built 1967 Load: 39.5 t ADT: 17,500
INTERSTATE 40
GoodOver: LEMMING WASH
08-SBD-040-R140.11-NED, San Bernardino, CA
Built 1967 Load: 39.5 t ADT: 16,700
INTERSTATE 5
GoodOver: BUENA VISTA LAGOON
11-SD-005-R50.94-CBD, San Diego, CA
Built 1953 Load: 39.5 t ADT: 203,000
NOELL ST OFF RA UC
GoodOver: NOELL STREET
11-SD-005-R18.53-SD, San Diego, CA
Built 1967 Load: 39.5 t ADT: 15,700
LOS CARNEROS RD
GoodOver: TECOLOTITO CREEK
0.1 MI N HOLLISTER AVE, Santa Barbara, CA
Built 1989 Load: 39.5 t ADT: 23,222
WATSON RD
GoodOver: FIFE CREEK
0.15 MI W ARMSTRNG WDS RD, Sonoma, CA
Built 1970 Load: 39.5 t ADT: 100
LAKE ROAD
GoodOver: T.I.D. MAIN CANAL
7.5 MI E ROBERTS FERRY RD, Stanislaus, CA
Built 1959 Load: 39.5 t ADT: 288
ST. JOHN LOOP ROAD
GoodOver: BUTTER CREEK
7.0 MI S HYAMPOM RD, Trinity, CA
Built 1955 Load: 39.5 t ADT: 50
BARKER CR.
GoodOver: BARKER CREEK
NO DATA ENTERED, Trinity, CA
Built 2010 Load: 39.5 t ADT: 50
STATE ROUTE 23
GoodOver: OLSEN ROAD
07-VEN-023-R8.19-THOK, Ventura, CA
Built 1970 Load: 39.5 t ADT: 89,000
TRIUNFO CYN RD
GoodOver: POTRERO VALLEY CREEK
0.4 MI E WESTLAKE BLVD, Ventura, CA
Built 1968 Load: 39.5 t ADT: 7,260
VIA GRANADA
GoodOver: SAN LORENZO CREEK
JUST S LEWELLING BLVD, Alameda, CA
Built 1950 Load: 39.9 t ADT: 3,400
DOE MILL ROAD
GoodOver: BUTTE CREEK
18 mi NE of Chico, CA, Butte, CA
Built 2017 Load: 39.9 t ADT: 160
GRIMES-ARBUCKLE RD
GoodOver: COLUSA TROUGH
4 MI E OF OLD RTE 99W, Colusa, CA
Built 1971 Load: 39.9 t ADT: 1,673
WILLOW PASS RD
GoodOver: MT DIABLO CRK
0.8 MI S OF SH 4, Contra Costa, CA
Built 1944 Load: 39.9 t ADT: 7,200
STATE ROUTE 45
GoodOver: STONY CREEK
03-GLE-045-R20.66, Glenn, CA
Built 1974 Load: 39.9 t ADT: 2,300
SHELTER COVE RD
GoodOver: MATTOLE RIVER
0.7 MI W/O BRICELAND RD, Humboldt, CA
Built 1981 Load: 39.9 t ADT: 1,302
FLINT AVE
GoodOver: LOWER KINGS RIVER DITCH
0.5 MI E OF 16TH AVE, Kings, CA
Built 1955 Load: 39.9 t ADT: 650
STATE ROUTE 27
GoodOver: CALABASAS CREEK
07-LA-027-13.93-LA, Los Angeles, CA
Built 1962 Load: 39.9 t ADT: 42,000
I 5
GoodOver: 1ST STREET
07-LA-005-17.77-LA, Los Angeles, CA
Built 1959 Load: 39.9 t ADT: 243,977
SIERRA HWY
GoodOver: MINT CYN WASH
1.3MI N/O SOLEDAD CYN RD, Los Angeles, CA
Built 1986 Load: 39.9 t ADT: 14,131
TRIUNFO CYN RD
GoodOver: LOBO CRK
0.5MI W/O KANAN RD, Los Angeles, CA
Built 1951 Load: 39.9 t ADT: 1,734
WARDLOW RD
GoodOver: SAN GABRIEL RIV
0.8MI W/O I-605 FWY, Los Angeles, CA
Built 1963 Load: 39.9 t ADT: 20,570
N MAIN ST
GoodOver: LOS ANGELES RIVER
0.5 MI W/O I-5, Los Angeles, CA
Built 1910 Load: 39.9 t ADT: 30,000
CHALON RD
GoodOver: HILLSIDE
0.8 MI N SUNSET BLVD, Los Angeles, CA
Built 1949 Load: 39.9 t ADT: 1,160
SR 164 (ROSEMEAD)
GoodOver: FLOOD FLOW CHANNEL
07-LA-164-2.06, Los Angeles, CA
Built 1952 Load: 39.9 t ADT: 45,900
S101-TALMAGE RD
GoodOver: DOOLIN CREEK
01-MEN-101-R23.59, Mendocino, CA
Built 1964 Load: 39.9 t ADT: 4,000
STATE ROUTE 140
GoodOver: MUD SLOUGH OVERFLOW
10-MER-140-10.64, Merced, CA
Built 1969 Load: 39.9 t ADT: 3,650
INTERSTATE 15 SB
GoodOver: INDIAN TRUCK TRAIL
08-RIV-015-30.40, Riverside, CA
Built 1979 Load: 39.9 t ADT: 60,500
INTERSTATE 40
GoodOver: ROADRUNNER WASH
08-SBD-040-R140.72-NED, San Bernardino, CA
Built 1967 Load: 39.9 t ADT: 17,500
INTERSTATE 40
GoodOver: ROADRUNNER WASH
08-SBD-040-R140.72-NED, San Bernardino, CA
Built 1967 Load: 39.9 t ADT: 16,700
KINGSLEY AVE
GoodOver: SAN ANTONIO CREEK CHAN
0.25 MI E LA CO LINE, San Bernardino, CA
Built 1958 Load: 39.9 t ADT: 6,700
STATE ROUTE 76
GoodOver: LUKET CREEK
11-SD-076-41.63, San Diego, CA
Built 1939 Load: 39.9 t ADT: 2,050
STATE ROUTE 1
GoodOver: CAYUCOS CREEK & ROAD
05-SLO-001-R36.15, San Luis Obispo, CA
Built 1965 Load: 39.9 t ADT: 7,800
INTERSTATE 280 NB
GoodOver: PRIVATE ROAD
04-SCL-280-R3.41-SJS, Santa Clara, CA
Built 1969 Load: 39.9 t ADT: 98,000
INTERSTATE 5
GoodOver: OAK STREET
02-SIS-005-1.79, Siskiyou, CA
Built 1960 Load: 39.9 t ADT: 18,000
INTERSTATE 5
GoodOver: GUYS GULCH
02-SIS-005-R39.27, Siskiyou, CA
Built 1969 Load: 39.9 t ADT: 8,300
STATE ROUTE 113
GoodOver: OLD ALAMO CREEK
04-SOL-113-9.58, Solano, CA
Built 1967 Load: 39.9 t ADT: 4,900
ROCKPILE ROAD
GoodOver: BOAT LAUNCH UC
0.5 MI W STWT PT-SK SP RD, Sonoma, CA
Built 1985 Load: 39.9 t ADT: 2,400
ROAD 152
GoodOver: MIDDLE FORK TULE RIVER
1.2 MI NORTH OF AVE 168, Tulare, CA
Built 1948 Load: 39.9 t ADT: 950
COUNTY ROAD 88
GoodOver: S FORK DUNNIGAN CREEK
0.3 MI N OF COUNTY ROAD 6, Yolo, CA
Built 1985 Load: 39.9 t ADT: 432
NORTH EARL ROAD
GoodOver: BRANCH OF HUTCHINSON CK
1.2 MILES NORTH OF INTER, Yuba, CA
Built 2018 Load: 39.9 t ADT: 50
STATE ROUTE 32
GoodOver: ROCK CREEK
03-BUT-032-2.08, Butte, CA
Built 1921 Load: 40.2 t ADT: 11,700
INTERSTATE 5
GoodOver: LURLINE CREEK
03-COL-005-R22.32, Colusa, CA
Built 1971 Load: 40.2 t ADT: 12,500
INTERSTATE 5
GoodOver: LURLINE CREEK
03-COL-005-R22.31, Colusa, CA
Built 1971 Load: 40.2 t ADT: 12,500
PORT CHICAGO HWY
GoodOver: MOUNT DIABLO CREEK
0.6 MI N HWY 4, Contra Costa, CA
Built 1979 Load: 40.2 t ADT: 3,240
E&W2-S5 CONNECTOR
GoodOver: NEWELL STREET
07-LA-002-14.97-LA, Los Angeles, CA
Built 1961 Load: 40.2 t ADT: 35,200
INTERSTATE 710
GoodOver: MILLER WAY
07-LA-710-17.68-SGT, Los Angeles, CA
Built 1957 Load: 40.2 t ADT: 223,000
STATE ROUTE 170
GoodOver: COLFAX AVE
07-LA-170-R15.91-LA, Los Angeles, CA
Built 1966 Load: 40.2 t ADT: 184,000
STATE ROUTE 2
GoodOver: SHERER LANE UC
07-LA-002-R20.57-GNDL, Los Angeles, CA
Built 1978 Load: 40.2 t ADT: 115,000
Showing 24,651-24,700 of 27,040 bridges
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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |