Contra Costa County, CA

686 public highway bridges

Contra Costa County Bridge Snapshot

Contra Costa County, California contains 686 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.7% are rated “Good,” 26.1% “Fair,” 5.5% “Poor,” and 5.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

686
Total Bridges
29.7%
Good
5.5%
Poor
5.5%
Structurally Deficient

Condition Distribution

Good
29.7% (204)
Fair
26.1% (179)
Poor
5.5% (38)
SD
5.5% (38)

All Bridges (686)

FERRY STREET

Poor

Over: ARROYO DEL HAMBRE

AT GREEN ST, Contra Costa, CA

Built 1940 Load: 15.2 t ADT: 3,000

DELTA ROAD

Poor

Over: MARSH CREEK

0.8 MI E OF SH4, Contra Costa, CA

Built 1965 Load: 16.8 t ADT: 4,147

SHELL AVE

Poor

Over: ARROYO DEL HAMBRE

300 FT EST OF ALHAMBRA AV, Contra Costa, CA

Built 1955 Load: 20.4 t ADT: 4,900

BRIONES VALLEY RD

Poor

Over: BRIONES VALLEY CREEK

2.9 MI W DEER VALLEY RD, Contra Costa, CA

Built 2001 Load: 22.0 t ADT: 50

SAN PABLO AVE

Poor

Over: BNSF RY AND AMTRAK

WEST OF CAROL LANE, Contra Costa, CA

Built 1938 Load: 22.4 t ADT: 10,300

MINER RD

Poor

Over: SAN PABLO CREEK

AT CAMINO PABLO, Contra Costa, CA

Built 1931 Load: 22.4 t ADT: 6,368

W580-CENTRAL OFF

Poor

Over: CENTRAL AVE

04-CC-580-0.04-RCH, Contra Costa, CA

Built 1991 Load: 23.7 t ADT: 4,300

DIABLO ROAD

Poor

Over: SAN RAMON CREEK

0.2 MI WEST OF I-680, Contra Costa, CA

Built 1966 Load: 23.7 t ADT: 21,350

ST FRANCIS DR

Poor

Over: GALINDO CREEK

0.1 MI E OAK GROVE RD, Contra Costa, CA

Built 1950 Load: 24.3 t ADT: 450

SECOND AVE SOUTH

Poor

Over: GRAYSON CREEK

JUST W CONTRA COSTA BLVD, Contra Costa, CA

Built 1954 Load: 24.3 t ADT: 3,419

CAMINO SOBRANTE

Poor

Over: SAN PABLO CREEK

75 FT E CAMINO PABLO, Contra Costa, CA

Built 1955 Load: 24.3 t ADT: 2,514

JERSEY ISLAND RD

Poor

Over: DUTCH SLOUGH

1.5 MILES N OF CYPRESS RD, Contra Costa, CA

Built 1949 Load: 24.3 t ADT: 188

NORTH LAKE DRIVE

Poor

Over: LAKE ALHAMBRA

AT EAST 13TH ST, Contra Costa, CA

Built 1961 Load: 24.3 t ADT: 1,500

DEL MONTE DR

Poor

Over: BNSF RY

0.1 MI N SAN PABLO AVE, Contra Costa, CA

Built 1965 Load: 25.3 t ADT: 3,124

INTERSTATE 680

Poor

Over: LAS TRAMPAS CREEK

04-CC-680-13.72-WLC, Contra Costa, CA

Built 1960 Load: 27.2 t ADT: 195,300

INTERSTATE 680

Poor

Over: EL PINTADO ROAD

04-CC-680-R8.75-DNVL, Contra Costa, CA

Built 1964 Load: 27.9 t ADT: 194,300

N680-N242 CONNECTR

Poor

Over: WALNUT CREEK

04-CC-680-R18.70-CND, Contra Costa, CA

Built 1963 Load: 31.1 t ADT: 63,800

INTERSTATE 680

Poor

Over: BLUM ROAD

04-CC-680-21.52, Contra Costa, CA

Built 1962 Load: 31.4 t ADT: 118,000

INTERSTATE 680

Poor

Over: WILLOW PASS ROAD

04-CC-680-19.04-CND, Contra Costa, CA

Built 1962 Load: 32.4 t ADT: 130,000

INTERSTATE 680

Poor

Over: GRAYSON CREEK

04-CC-680-20.89, Contra Costa, CA

Built 1962 Load: 32.4 t ADT: 169,000

EB 4-SB 680 CONN

Poor

Over: GRAYSON CREEK

04-CC-680-20.88, Contra Costa, CA

Built 2005 Load: 32.4 t ADT: 28,700

HERCULES AVE

Poor

Over: BNSF RY

AT SAN PABLO AVE, Contra Costa, CA

Built 1985 Load: 32.4 t ADT: 4,000

RAILROAD AVE

Poor

Over: UP RR,PARKSIDE,RAILROAD

0.1 MI S OF CENTRAL AVE, Contra Costa, CA

Built 1988 Load: 32.4 t ADT: 10,000

CYPRESS ROAD

Poor

Over: MARSH CREEK

0.05 MI EAST OF SR 4, Contra Costa, CA

Built 1964 Load: 33.7 t ADT: 9,415

MARSH CREEK RD

Poor

Over: MARSH CREEK

3 MI E DEER VALLEY ROAD, Contra Costa, CA

Built 1937 Load: 35.0 t ADT: 3,979

CHURCH LANE

Poor

Over: SAN PABLO CREEK

0.1 MI S EL PORTAL, Contra Costa, CA

Built 1955 Load: 36.6 t ADT: 12,540

MORAGA BLVD

Poor

Over: LAS TRAMPAS CREEK

0.2 MI E FIRST ST, Contra Costa, CA

Built 1937 Load: 36.6 t ADT: 2,200

STATE ROUTE 24 WB

Poor

Over: LAFAYETTE STA PUC(BARTD)

04-CC-024-R6.08-LFYT, Contra Costa, CA

Built 1970 Load: 40.2 t ADT: 79,500

CREEKSIDE DR

Poor

Over: SAN RAMON CREEK

200 FT E OF S MAIN ST, Contra Costa, CA

Built 1959 Load: 41.1 t ADT: 5,800

LA GONDA WAY

Poor

Over: SAN RAMON CREEK

AT DANVILLE BLVD, Contra Costa, CA

Built 1950 Load: 42.1 t ADT: 2,800

STATE ROUTE 24

Poor

Over: BROWN AVENUE

04-CC-024-R6.84-LFYT, Contra Costa, CA

Built 1957 Load: 43.4 t ADT: 79,500

MAIN STREET

Poor

Over: CONTRA COSTA CANAL

.01 MI SE/O OAKLEY RD, Contra Costa, CA

Built 1977 Load: 46.7 t ADT: 28,500

STATE ROUTE 242

Poor

Over: CONCORD AVENUE

04-CC-242-R1.47-CND, Contra Costa, CA

Built 1963 Load: 47.1 t ADT: 100,000

AYERS ROAD

Poor

Over: MOUNT DIABLO CREEK

0.3 MI N CLAYTON RD, Contra Costa, CA

Built 1987 Load: 49.2 t ADT: 8,000

STATE ROUTE 24

Poor

Over: EBMUD AQUEDUCT

04-CC-024-R6.75-LFYT, Contra Costa, CA

Built 1957 Load: 50.5 t ADT: 79,500

BYRON HWY

Structurally Deficient

Over: CALIFORNIA AQUEDUCT

5.6 MI SOUTH OF SR 4, Contra Costa, CA

Built 1964 Load: 4.5 t ADT: 8,387

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial