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
STATE ROUTE 99
FairOver: LITTLE DRY CREEK
06-MAD-099-5.88, Madera, CA
Built 1912 Load: 16.2 t ADT: 67,000
STATE ROUTE 1
FairOver: LAGUNITAS CREEK OVERFLOW
04-MRN-001-28.39, Marin, CA
Built 1929 Load: 16.2 t ADT: 3,000
STATE ROUTE 1
FairOver: LAGUNITAS CREEK OVERFLOW
04-MRN-001-28.56, Marin, CA
Built 1929 Load: 16.2 t ADT: 3,000
STATE ROUTE 1
FairOver: ELLIS CREEK
04-MRN-001-34.97, Marin, CA
Built 1931 Load: 16.2 t ADT: 2,300
STATE ROUTE 1
FairOver: TOMASINI CANYON
04-MRN-001-29.85, Marin, CA
Built 1925 Load: 16.2 t ADT: 2,300
SUTRO AVE
FairOver: NOVATO CREEK
0.1 MI S NOVATO BLVD, Marin, CA
Built 1935 Load: 16.2 t ADT: 7,153
WILSON HILL RD
FairOver: ARROYO SAUSAL TRIBUTARY
0.22 MI W PT RYS-PETLMA R, Marin, CA
Built 1928 Load: 16.2 t ADT: 330
MONTEZUMA RD
FairOver: SAN GERONIMO CREEK
.03 MI S SR FRNCS DRAKE B, Marin, CA
Built 1938 Load: 16.2 t ADT: 50
MARIN DR
FairOver: FAIRFAX CREEK
AT BOTHIN RD, Marin, CA
Built 1930 Load: 16.2 t ADT: 110
STATE ROUTE 49
FairOver: DELONG CREEK
10-MPA-049-6.18, Mariposa, CA
Built 1948 Load: 16.2 t ADT: 3,725
OLD HIGHWAY ROAD
FairOver: AGUA FRIA CREEK
4.7 MI SW OF SR 49, Mariposa, CA
Built 1919 Load: 16.2 t ADT: 180
WHITE ROCK ROAD
FairOver: MARIPOSA CREEK
1.6 MI S/O OLD HWY, Mariposa, CA
Built 1968 Load: 16.2 t ADT: 20
TRIANGLE ROAD
FairOver: SUMMIT CREEK
STATE ROUTE 140, Mariposa, CA
Built 1935 Load: 16.2 t ADT: 960
STATE ROUTE 99
FairOver: TURLOCK CANAL
10-MER-099-R35.04, Merced, CA
Built 1935 Load: 16.2 t ADT: 65,000
STATE ROUTE 99 SB
FairOver: WEBBER CANAL
10-MER-099-19.49, Merced, CA
Built 1919 Load: 16.2 t ADT: 28,000
STATE ROUTE 33
FairOver: PARNELL BYPASS
10-MER-033-21.47, Merced, CA
Built 1920 Load: 16.2 t ADT: 7,475
BLOSS AVENUE
FairOver: HIGH LINE CANAL
1.0 MI WEST OF SR 99, Merced, CA
Built 1940 Load: 16.2 t ADT: 1,177
WILLIAMS AVENUE
FairOver: HIGH LINE WASTEWAY
1.6 MI E GRIFFITH AVE, Merced, CA
Built 1935 Load: 16.2 t ADT: 400
HINTON AVENUE
FairOver: HIGH LINE CANAL
0.3 MI S OF BLOSS AVE, Merced, CA
Built 1940 Load: 16.2 t ADT: 610
SYCAMORE STREET
FairOver: HIGH LINE CANAL
0.5 MI N BLOSS AVE, Merced, CA
Built 1940 Load: 16.2 t ADT: 1,272
ROSELAWN AVENUE
FairOver: LATERAL #5
0.3 MI W MERCED AVE, Merced, CA
Built 1940 Load: 16.2 t ADT: 65
SECOND AVENUE
FairOver: HIGH LINE CANAL
AT CANAL DRIVE, Merced, CA
Built 1940 Load: 16.2 t ADT: 125
SOUTH AVE
FairOver: HIGH LINE CANAL
0.3 MI W CORTEZ AVE, Merced, CA
Built 1940 Load: 16.2 t ADT: 266
NORTH AVENUE
FairOver: HIGH LINE CANAL
AT PEPPER ST, Merced, CA
Built 1940 Load: 16.2 t ADT: 110
BRADBURY ROAD
FairOver: HIGH LINE CANAL
AT PEPPER ST, Merced, CA
Built 1940 Load: 16.2 t ADT: 643
LOMBARDY AVENUE
FairOver: HIGH LINE CANAL
AT PEPPER ST, Merced, CA
Built 1940 Load: 16.2 t ADT: 263
AMSTERDAM ROAD
FairOver: ESCALADIAN CANAL
AT YOUD ROAD, Merced, CA
Built 1940 Load: 16.2 t ADT: 86
SHAFFER ROAD
FairOver: LIVINGSTON CANAL
0.2 MI N BELLEVUE ROAD, Merced, CA
Built 1930 Load: 16.2 t ADT: 6,238
WARDROBE AVENUE
FairOver: EL CAPITAN CANAL
AT THORNTON AVENUE, Merced, CA
Built 1935 Load: 16.2 t ADT: 500
BAILEY AVENUE
FairOver: EL CAPITAN CANAL
AT THORNTON AVENUE, Merced, CA
Built 1945 Load: 16.2 t ADT: 300
GOVE ROAD
FairOver: EL CAPITAN CANAL
AT RICE ROAD, Merced, CA
Built 1945 Load: 16.2 t ADT: 500
JERRY COLLINS AVE
FairOver: DEANE CANAL
AT GURR ROAD, Merced, CA
Built 1940 Load: 16.2 t ADT: 40
FAHEY ROAD
FairOver: OUTSIDE CANAL
0.2 MI E HWY 33, Merced, CA
Built 1945 Load: 16.2 t ADT: 95
BUHACH ROAD
FairOver: ESCALADIAN CANAL
0.2 MI NORTH OF SHAW AVE, Merced, CA
Built 1938 Load: 16.2 t ADT: 200
EL CAPITAN WAY
FairOver: HIGH LINE CANAL
0.25 MI W PEPPER ST, Merced, CA
Built 1925 Load: 16.2 t ADT: 948
PEPPER STREET
FairOver: HIGH LINE CANAL
0.5 MI N SANTA FE DRIVE, Merced, CA
Built 1948 Load: 16.2 t ADT: 200
PEPPER STREET
FairOver: HIGH LINE CANAL
EAST AVENUE, Merced, CA
Built 1948 Load: 16.2 t ADT: 50
MERCED AVENUE
FairOver: LATERAL #6
1.35 MI SOUTH OF SR 99, Merced, CA
Built 1948 Load: 16.2 t ADT: 2,249
GRIFFITH AVENUE
FairOver: HIGH LINE CANAL
1.15 MI SOUTH BLOSS AVE, Merced, CA
Built 1948 Load: 16.2 t ADT: 204
OAKDALE ROAD
FairOver: ESCALADIAN CANAL
YOUD ROAD, Merced, CA
Built 1948 Load: 16.2 t ADT: 480
CENTER AVENUE
FairOver: CCID MAIN CANAL
0.4 MI SOUTH OF SR 152, Merced, CA
Built 1948 Load: 16.2 t ADT: 4,087
OLD STATE ROUTE 99
FairOver: OWENS CREEK
0.7 MI SE OF HEALY RD, Merced, CA
Built 1914 Load: 16.2 t ADT: 384
STATE ROUTE 299
FairOver: W BR CLOVERSWALE CREEK
02-MOD-299-27.35, Modoc, CA
Built 1920 Load: 16.2 t ADT: 2,200
COUNTY ROAD 215
FairOver: HOWARDS GULCH
2.15 MI N/O RTE 299, Modoc, CA
Built 1931 Load: 16.2 t ADT: 32
SURPRISE VALLEY RD
FairOver: OWL CREEK
11.0 MI S OF SH 299, Modoc, CA
Built 1943 Load: 16.2 t ADT: 450
U.S. HIGHWAY 101
FairOver: ELKHORN SLOUGH TRIBUTARY
05-MON-101-100.95, Monterey, CA
Built 1930 Load: 16.2 t ADT: 59,000
STATE ROUTE 128
FairOver: BLOSSOM CREEK
04-NAP-128-2.80, Napa, CA
Built 1901 Load: 16.2 t ADT: 2,775
STATE ROUTE 128
FairOver: SAGE CREEK
04-NAP-128-11.26, Napa, CA
Built 1945 Load: 16.2 t ADT: 2,125
STATE ROUTE 29
FairOver: GARNETT CREEK BRANCH
04-NAP-029-38.96, Napa, CA
Built 1920 Load: 16.2 t ADT: 12,000
ZINFANDEL LANE
FairOver: NAPA RIVER
1 MI E RT 29 WHEELER STA, Napa, CA
Built 1913 Load: 16.2 t ADT: 2,600
Showing 8,451-8,500 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.