Total Bridges
27,040
Public highway bridges in California
State profile · Below median Poor share
California bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in California, based on the FHWA National Bridge Inventory.
- 27,040
- Public bridges
- 32.5%
- Good condition
- 4.6%
- Poor condition
Data updated May 2026
Good Condition
32.5%
8,777 bridges rated 7-9
-17.5pp vs 50% benchmark
Poor Condition
4.6%
1,244 bridges whose lowest applicable component is rated 0-4
-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 - Poor-condition share 15.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
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 by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below California on the same metric.
OH
Ohio
4.54% top marginal rate
NJ
New Jersey
4.59% top marginal rate
CA
California
4.60% top marginal rate
AR
Arkansas
4.71% top marginal rate
WA
Washington
4.81% top marginal rate
Bridges Needing Most Attention in California
Six lowest-condition bridges in California, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
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
PoorOver: 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
PEDESTRIAN WALKWAY
UnknownOver: STATE ROUTE 1
04-SM-001-R44.07-PFA, San Mateo, CA
Built 2019 ADT: 32,500
BAYFRONT POC
UnknownOver: STATE ROUTE 84
04-SM-084-R27.02-MLP, San Mateo, CA
Built 2022 ADT: 27,500
CALTRAIN & UP RR
UnknownOver: AIRPORT BLVD
0.1 MI N SAN MATEO AVE, San Mateo, CA
Built 1927 ADT: 25,127
DUNMAN ST
UnknownOver: HICKEY BLVD
OVER HICKEY BLVD, San Mateo, CA
Built 1965 ADT: 23,578
PEDESTRIAN WALKWAY
UnknownOver: JUNIPERO SERRA BL
0.2 MI S/O HICKEY RD, San Mateo, CA
Built 1968 ADT: 10,000
PACIFIC BLVD
UnknownOver: HILLSDALE BLVD
PACIFIC BLVD @ HILLSDALE, San Mateo, CA
Built 1965 ADT: 25,620
CALTRAIN & UP RR
UnknownOver: HILLSDALE BLVD
CALTRAIN @ HILLSDALE BLVD, San Mateo, CA
Built 1965 ADT: 25,620
PEDESTRIAN WALKWAY
UnknownOver: N MCDONNELL ROAD
NORHT OF SAN BRUNO AVE, San Mateo, CA
Built 1986 ADT: 27,000
CALTRAIN & UP RR
UnknownOver: TILTON AVENUE
EAST OF RAILROAD AVE, San Mateo, CA
Built 1903 ADT: 4,900
CITY PARKING LOT
UnknownOver: SM DR AND ELLSWORTH AVE
SOUTH OF 3RD AVE, San Mateo, CA
Built 1966 ADT: 6,580
CALTRAIN & UP RR
UnknownOver: SANTA INEZ AVE
EAST OF RAMONA ST, San Mateo, CA
Built 1903 ADT: 1,270
CALTRAIN & UP RR
UnknownOver: EAST POPLAR AVE
EAST RAMONA ST, San Mateo, CA
Built 1903 ADT: 9,270
TUNNEL AVE
UnknownOver: UP RR
TUNNEL AVE @ UPRR, San Mateo, CA
Built 2007 ADT: 20
DEPARTING FLT TRFC
UnknownOver: ARRIVING FLIGHT TRAFFIC
EAST OF US RT 101, San Mateo, CA
Built 1973 ADT: 4,890
ROAD-1 NORTH
UnknownOver: MCDONNELL RD
EAST OF SH 101, San Mateo, CA
Built 1970 ADT: 4,490
ROAD-1 SOUTH
UnknownOver: MCDONNELL RD
EAST OF SH 101, San Mateo, CA
Built 1970 ADT: 4,490
R-1S
UnknownOver: R-1S
EAST OF US 101, San Mateo, CA
Built 1973 ADT: 12,930
PEDESTRIAN WALKWAY
UnknownOver: 31ST AVE
WEST OF SH 82, San Mateo, CA
Built 1983 ADT: 3,000
CALTRAIN & UP RR
UnknownOver: 42ND AVE
EAST OF US 101, San Mateo, CA
Built 1989 ADT: 7,060
OYSTER POINT BLVD
UnknownOver: CALTRAIN & UP RR
0.1 MILES W OF GATEWAY BL, San Mateo, CA
Built 1994 ADT: 385
AIRPORT TERM OFF-R
UnknownOver: US 101
H16 TO A26 OF 35 0275K, San Mateo, CA
Built 1987 ADT: 5,000
AIRPORT TERM ON-RP
UnknownOver: US 101
RAMP TO RTE SB 101, San Mateo, CA
Built 1996 ADT: 4,890
I380 NB ON-RAMP
UnknownOver: US 101
SPAN 9 HINGE TO BENT 19, San Mateo, CA
Built 1996 ADT: 4,890
S101-SFO INTERNTNL
UnknownOver: NB101-SFO DOMESTIC TRMNL
SIU H19 & NIU HP TO B22, San Mateo, CA
Built 1996 ADT: 4,890
AIRPORT TERM OFF-R
UnknownOver: US 101
RAMP FROM RTE SB 101, San Mateo, CA
Built 1996 ADT: 7,154
GARAGE CONNECTOR
UnknownOver: NORTH/SOUTH GARAGE
0.3 MI E/O N. MACDONNELL, San Mateo, CA
Built 2000 ADT: 2,500
INTERNATIONAL VIA
UnknownOver: AIRPORT ACCESS ROAD
EAST OF MCDONNELL ROAD, San Mateo, CA
Built 2001 ADT: 18,000
INTNL RETURN LOOP
UnknownOver: AIRPORT ACCS RDS,N MCDON
AT N.MCDONNELL RD, San Mateo, CA
Built 2001 ADT: 50,000
PEDESTRIAN WALKWAY
UnknownOver: UPPER LEVEL DOMESTIC VIA
TERMINAL 1 - AREA B, San Mateo, CA
Built 2006 ADT: 19,170
PEDESTRIAN WALKWAY
UnknownOver: UPPER LEVEL DOMESTIC VIA
TERMINAL 2 - AREA D, San Mateo, CA
Built 2006 ADT: 19,170
PEDESTRIAN WALKWAY
UnknownOver: UPPER LEVEL DOMESTIC VIA
TERMINAL 3 - AREA F, San Mateo, CA
Built 2006 ADT: 19,170
AIR TRAIN TRACKS
UnknownOver: UPPER LEVEL DOMESTIC VIA
SF AIRPORT DOMESTIC TERM, San Mateo, CA
Built 2003 ADT: 19,170
AIR TRAIN TRACKS
UnknownOver: BART, INTERNL VIA, RAMPS
SF AIR INTERNATIONAL TERM, San Mateo, CA
Built 2003 ADT: 19,170
AIR TRAIN TRACKS
UnknownOver: NORTH MCDONNELL RD, NB
0.2 MI S OF SAN BRUNO AVE, San Mateo, CA
Built 2003 ADT: 5,000
OLIVE MILL ROAD
UnknownOver: U.S. HIGHWAY 101
05-SB-101-10.54-SB, Santa Barbara, CA
Built 1956 ADT: 76,000
STATE ROUTE 1 NB
UnknownOver: ST RTE 135 (@PM 11.72)
05-SB-001-M36.16, Santa Barbara, CA
Built 1966 ADT: 18,600
ALVIN AVE
UnknownOver: US HWY 101 & BRADLEY CHN
05-SB-101-89.13-SMRA, Santa Barbara, CA
Built 1972 ADT: 58,000
US HIGHWAY 101 SB
UnknownOver: SANTA MARIA WAY
05-SB-101-84.34, Santa Barbara, CA
Built 1962 ADT: 11,600
US HIGHWAY 101 NB
UnknownOver: SANTA MARIA WAY
05-SB-101-84.34, Santa Barbara, CA
Built 1962 ADT: 11,600
US HIGHWAY 101 SB
UnknownOver: CABRILLO BLVD
05-SB-101-11.43-SB, Santa Barbara, CA
Built 1934 ADT: 15,700
US HIGHWAY 101 NB
UnknownOver: CABRILLO BLVD
05-SB-101-11.43-SB, Santa Barbara, CA
Built 1956 ADT: 15,700
TURNPIKE ROAD
UnknownOver: US HIGHWAY 101
05-SB-101-20.06, Santa Barbara, CA
Built 1975 ADT: 121,000
STATE ROUTE 1 NB
UnknownOver: ST RT 135 SB (@PM R9.09)
05-SB-001-R34.76, Santa Barbara, CA
Built 1966 ADT: 3,050
STATE ROUTE 135 SB
UnknownOver: RICE RANCH RD
05-SB-135-R10.00, Santa Barbara, CA
Built 1966 ADT: 1,870
STATE ROUTE 135 NB
UnknownOver: RICE RANCH RD
05-SB-135-R10.00, Santa Barbara, CA
Built 1966 ADT: 1,870
STATE ROUTE 135 SB
UnknownOver: E CLARK AVE
05-SB-135-R10.41, Santa Barbara, CA
Built 1966 ADT: 14,864
STATE ROUTE 135 NB
UnknownOver: E CLARK AVE
05-SB-135-R10.41, Santa Barbara, CA
Built 1966 ADT: 14,864
STATE ROUTE 217
UnknownOver: HOLLISTER AVE
05-SB-217-2.23-SB, Santa Barbara, CA
Built 1963 ADT: 12,000
STATE ROUTE 217
UnknownOver: GOLETA SLOUGH
05-SB-217-0.72-SB, Santa Barbara, CA
Built 1963 ADT: 1,500
PATTERSON AVE
UnknownOver: US HIGHWAY 101
05-SB-101-21.15, Santa Barbara, CA
Built 1992 ADT: 121,000
Showing 6,401-6,450 of 27,040 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.