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
SANTA ROSA ST
FairOver: SAN LUIS OBISPO CREEK
0.01 MI SE OF MARSH ST, San Luis Obispo, CA
Built 2000 Load: 32.4 t ADT: 6,976
PIER AVE
FairOver: OCEANO BEACH LAGOON
0.2 MI W OF SR 1, San Luis Obispo, CA
Built 1994 Load: 32.4 t ADT: 5,037
RANCHITA CANYON RD
FairOver: RANCHITA CREEK
0.5 MI S CROSS CANYONS RD, San Luis Obispo, CA
Built 1996 Load: 32.4 t ADT: 655
RANCHITA CANYON RD
FairOver: RANCHITA CREEK
1.7 MI N CROSS CYN RD, San Luis Obispo, CA
Built 1997 Load: 32.4 t ADT: 655
RANCHITA CANYON RD
FairOver: RANCHITA CREEK
2.5 MI N CROSS CYN RD, San Luis Obispo, CA
Built 1997 Load: 32.4 t ADT: 655
RANCHITA CANYON RD
FairOver: RANCHITA CREEK
2.9 MI N CROSS CYN RD, San Luis Obispo, CA
Built 1997 Load: 32.4 t ADT: 655
RESERVOIR CANYN RD
FairOver: SAN LUIS OBISPO CREEK
0.1 MILES S. OF US 101, San Luis Obispo, CA
Built 1998 Load: 32.4 t ADT: 100
TORO CREEK ROAD
FairOver: TORO CREEK
1.15 MILES NE OF HWY 1, San Luis Obispo, CA
Built 1998 Load: 32.4 t ADT: 247
SOUTH BAY BLVD
FairOver: CHORRO CREEK
1 MILE SOUTH OF HIGHWAY 1, San Luis Obispo, CA
Built 1997 Load: 32.4 t ADT: 1,500
O'DONOVAN ROAD
FairOver: HUER HUERO CREEK
HUER HUERO CREEK, San Luis Obispo, CA
Built 1999 Load: 32.4 t ADT: 100
UNION ROAD
FairOver: DRY CREEK
BETWEEN BRANCH & GENESEO, San Luis Obispo, CA
Built 2000 Load: 32.4 t ADT: 801
EL CAMINO REAL
FairOver: ATASCADERO CREEK
0.1 MI SW INTX EAST MALL, San Luis Obispo, CA
Built 1915 Load: 32.4 t ADT: 20,000
LAS PILITAS RD
FairOver: SALINAS RIVER
SLO CTY, San Luis Obispo, CA
Built 2006 Load: 32.4 t ADT: 500
SAN SIMEON CRK RD
FairOver: SAN SIMEON CREEK
3.5 MI EAST OF SR 1, San Luis Obispo, CA
Built 2012 Load: 32.4 t ADT: 250
SAN SIMEON CRK RD
FairOver: SAN SIMEON CREEK
2.65 MI EAST OF HWY 1, San Luis Obispo, CA
Built 2011 Load: 32.4 t ADT: 500
SAN LUIS BAY DR
FairOver: SAN LUIS OBISPO CREEK
AVILA RD, San Luis Obispo, CA
Built 2009 Load: 32.4 t ADT: 500
GARCIA ROAD
FairOver: GRAVES CREEK
0.3 MI NORTH OF DEL RIO, San Luis Obispo, CA
Built 2007 Load: 32.4 t ADT: 250
TURRI RD
FairOver: N BR LOS OSOS CREEK
.16 MI N OF LOS OSOS V RD, San Luis Obispo, CA
Built 2007 Load: 32.4 t ADT: 414
RIVER ROAD
FairOver: SALINAS RIVER
0.5 MI E MISSION ST, San Luis Obispo, CA
Built 2005 Load: 32.4 t ADT: 500
BROAD ST
FairOver: ACACIA CREEK
N OF CAPITOLIO WAY, San Luis Obispo, CA
Built 1968 Load: 32.4 t ADT: 22,100
MOONSTONE BEACH DR
FairOver: LEFFINGWELL CREEK
SOUTH OF STATE PARK RD, San Luis Obispo, CA
Built 2011 Load: 32.4 t ADT: 500
WILLOW ROAD
FairOver: NIPOMO CREEK
0.2 MI EAST OF US 101, San Luis Obispo, CA
Built 2012 Load: 32.4 t ADT: 1,000
W TEFFT STREET
FairOver: EAST BRANCH NIPOMO CREEK
W TEFFT ST AT S BURTON ST, San Luis Obispo, CA
Built 2009 Load: 32.4 t ADT: 9,800
FULLER ROAD
FairOver: E FK SAN LUIS OBISPO CK
JEO BROAD STREET/HWY 227, San Luis Obispo, CA
Built 2000 Load: 32.4 t ADT: 1,050
CYPRESS MOUNTAIN
FairOver: BRANCH LAS TABLAS CREEK
1.3 MI. NW KLAU MINE RD, San Luis Obispo, CA
Built 1996 Load: 32.4 t ADT: 200
HOLLISTER ROAD
FairOver: CHORRO CREEK
CUESTA COLLEGE, San Luis Obispo, CA
Built 2010 Load: 32.4 t ADT: 1,500
STATE ROUTE 1 SB
FairOver: CLARENDON ROAD
04-SM-001-R43.74-PFA, San Mateo, CA
Built 1965 Load: 32.4 t ADT: 16,250
STATE ROUTE 1 NB
FairOver: CLARENDON ROAD
04-SM-001-R43.74-PFA, San Mateo, CA
Built 1965 Load: 32.4 t ADT: 16,250
STATE ROUTE 1
FairOver: PESCADERO CREEK
04-SM-001-14.00, San Mateo, CA
Built 1991 Load: 32.4 t ADT: 6,100
N280-E380 CONNECTR
FairOver: SAN BRUNO AV-N280 ON-RMP
04-SM-280-R20.90-SBR, San Mateo, CA
Built 1971 Load: 32.4 t ADT: 11,500
STATE ROUTE 82
FairOver: LAUREL CREEK
04-SM-082-9.24-SM, San Mateo, CA
Built 1965 Load: 32.4 t ADT: 34,750
US 101, MCDONNELL
FairOver: MILLBRAE SLOUGH
04-SM-101-18.09-MLBR, San Mateo, CA
Built 1947 Load: 32.4 t ADT: 226,000
SAN BRUNO AVENUE
FairOver: SAN BRUNO CANAL
04-SM-101-R20.39, San Mateo, CA
Built 1947 Load: 32.4 t ADT: 10,100
N101-SIERRA PT OFF
FairOver: CALTRAIN & UP RR
04-SM-101-23.66-BSBN, San Mateo, CA
Built 1982 Load: 32.4 t ADT: 1,100
U.S. HIGHWAY 101
FairOver: BOREL CREEK
04-SM-101-11.67-SM, San Mateo, CA
Built 1954 Load: 32.4 t ADT: 195,000
STATE ROUTE 92
FairOver: FOSTER CITY LAGOON
04-SM-092-R13.83-FSTC, San Mateo, CA
Built 1967 Load: 32.4 t ADT: 86,000
N35-N1 CNNCTR RMP
FairOver: LAKESHIRE DRIVE
04-SM-035-R28.64-DLC, San Mateo, CA
Built 1972 Load: 32.4 t ADT: 7,300
STATE ROUTE 280 SB
FairOver: TROUSDALE DRIVE
04-SM-280-R17.16, San Mateo, CA
Built 1969 Load: 32.4 t ADT: 54,500
STATE ROUTE 280 NB
FairOver: TROUSDALE DRIVE
04-SM-280-R17.16, San Mateo, CA
Built 1969 Load: 32.4 t ADT: 54,500
INTERSTATE 280 SB
FairOver: RANCHO PULGAS VISTA ROAD
04-SM-280-9.41, San Mateo, CA
Built 1973 Load: 32.4 t ADT: 51,500
INTERSTATE 280 NB
FairOver: RANCHO PULGAS VISTA ROAD
04-SM-280-9.41, San Mateo, CA
Built 1973 Load: 32.4 t ADT: 55,500
INTERSTATE 280 SB
FairOver: SERVICE ROAD
04-SM-280-R6.99, San Mateo, CA
Built 1973 Load: 32.4 t ADT: 50,000
INTERSTATE 280 NB
FairOver: SERVICE ROAD
04-SM-280-R6.99, San Mateo, CA
Built 1973 Load: 32.4 t ADT: 50,000
STATE ROUTE 1
FairOver: DENNISTON CREEK
04-SM-001-33.30-HMBY, San Mateo, CA
Built 1990 Load: 32.4 t ADT: 15,600
OYSTER POINT-N101
FairOver: OYSTER POINT DRAIN CLVRT
04-SM-101-22.89-SSF, San Mateo, CA
Built 1995 Load: 32.4 t ADT: 8,000
BRADFORD ST
FairOver: REDWOOD CREEK
BTWN MAIN ST & JEFFSN AVE, San Mateo, CA
Built 1966 Load: 32.4 t ADT: 2,000
MAIN ST
FairOver: REDWOOD CREEK
@ VETERANS BLVD, San Mateo, CA
Built 1989 Load: 32.4 t ADT: 9,000
VETERANS BLVD
FairOver: REDWOOD CREEK
EAST OF MAIN ST, San Mateo, CA
Built 1990 Load: 32.4 t ADT: 26,000
CRYSTAL SPRINGS RD
FairOver: SAN MATEO CREEK
POLHEMUS ROAD, San Mateo, CA
Built 1974 Load: 32.4 t ADT: 1,637
MARINERS ISL BLVD
FairOver: BRANCH MARINA LAGOON
0.1 MI W/O TILLER DR, San Mateo, CA
Built 1999 Load: 32.4 t ADT: 2,150
Showing 14,051-14,100 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.