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)

Sort:

EL CURTOLA BLVD

Over: STATE ROUTE 24 & BARTD

04-CC-024-R8.27, Contra Costa, CA

Built 1971 ADT: 159,000

S680-W24 CONNECTOR

Over: N680-W24, CAMINO DIABLO

04-CC-680-14.40-WLC, Contra Costa, CA

Built 1997 ADT: 5,000

E24/N680 CONNECTOR

Over: N680/W24 CONN,I-680,C.D.

04-CC-024-R8.86-WLC, Contra Costa, CA

Built 1998 ADT: 30,000

E24-S680 CONNECTOR

Over: BOULEVARD WAY

04-CC-024-R8.77-WLC, Contra Costa, CA

Built 1994 ADT: 9,970

INTERSTATE 680 SB

Over: MT DIABLO BOULEVARD

04-CC-680-14.22-WLC, Contra Costa, CA

Built 1995 ADT: 33,500

INTERSTATE 680 NB

Over: MT DIABLO BOULEVARD

04-CC-680-14.22-WLC, Contra Costa, CA

Built 1998 ADT: 33,500

N680-W24 CONNECTOR

Over: OLYMPIC BLVD,I-680

04-CC-680-14.15-WLC, Contra Costa, CA

Built 1998 ADT: 5,900

STATE ROUTE 24

Over: HAPPY VALLEY ROAD

04-CC-024-R5.97-LFYT, Contra Costa, CA

Built 1970 ADT: 11,400

STATE ROUTE 24

Over: HAPPY VALLEY ROAD

04-CC-024-R5.97-LFYT, Contra Costa, CA

Built 1957 ADT: 11,400

STATE ROUTE 24

Over: OAK HILL ROAD

04-CC-024-R6.26-LFYT, Contra Costa, CA

Built 1970 ADT: 11,400

STATE ROUTE 24

Over: OAK HILL ROAD

04-CC-024-R6.26-LFYT, Contra Costa, CA

Built 1971 ADT: 11,400

STATE ROUTE 24

Over: EL NIDO RANCH RD,AQUEDUC

04-CC-024-R4.90-LFYT, Contra Costa, CA

Built 1969 ADT: 3,870

STATE ROUTE 24

Over: EL NIDO RANCH RD

04-CC-024-R4.90-LFYT, Contra Costa, CA

Built 1957 ADT: 3,870

STATE ROUTE 580

Over: STENMARK DR SB ON-RAMP

04-CC-580-6.01-RCH, Contra Costa, CA

Built 1956 ADT: 3,000

INTERSTATE 80

Over: BNSF,SYCAMORE,WILLOW

04-CC-080-9.72-HER, Contra Costa, CA

Built 1998 ADT: 30,000

W4-W80 CONNECTOR

Over: BNSF, WILLOW, SYCAMORE

04-CC-004-0.01-HER, Contra Costa, CA

Built 1983 ADT: 1,200

APPIAN WAY SB

Over: INTERSTATE 80

04-CC-080-7.60-PIN, Contra Costa, CA

Built 1957 ADT: 190,000

INTERSTATE 80

Over: STATE ROUTE 4 & RAMPS

04-CC-080-10.02-HER, Contra Costa, CA

Built 1958 ADT: 16,000

CUMMINGS SKYWAY

Over: INTERSTATE 80

04-CC-080-12.75, Contra Costa, CA

Built 1958 ADT: 115,000

INTERSTATE 80

Over: WILLOW AVENUE

04-CC-080-10.69-HER, Contra Costa, CA

Built 1958 ADT: 19,200

E80-WILLOW AVENUE

Over: WILLOW AVENUE

04-CC-080-10.69-HER, Contra Costa, CA

Built 2010 ADT: 19,200

PEDESTRIAN WALKWAY

Over: INTERSTATE 80

04-CC-080-0.50-RCH, Contra Costa, CA

Built 1996 ADT: 179,000

INTERSTATE 680

Over: NEWELL AVENUE

04-CC-680-13.67-WLC, Contra Costa, CA

Built 1994 ADT: 195,300

INTERSTATE 680

Over: OLYMPIC BOULEVARD

04-CC-680-13.93-WLC, Contra Costa, CA

Built 1994 ADT: 25,000

STATE ROUTE 242

Over: WILLOW PASS ROAD

04-CC-242-R0.87-CND, Contra Costa, CA

Built 1963 ADT: 24,000

INTERSTATE 680

Over: LILAC DRIVE

04-CC-680-13.46-WLC, Contra Costa, CA

Built 1960 ADT: 3,115

INTERSTATE 680

Over: SOUTH MAIN STREET

04-CC-680-13.08-WLC, Contra Costa, CA

Built 1959 ADT: 14,871

BNSF RY & AMTRAK

Over: INTERSTATE 680

04-CC-680-22.20, Contra Costa, CA

Built 1962 ADT: 118,000

N680-PACHECO OFFRP

Over: INTERSTATE ROUTE 680

04-CC-680-22.43, Contra Costa, CA

Built 1962 ADT: 118,000

INTERSTATE 680 SB

Over: UPRR,MARINA VISTA,MOCOCO

04-CC-680-24.26, Contra Costa, CA

Built 1962 ADT: 7,000

STATE ROUTE 4

Over: INTERSTATE ROUTE 680

04-CC-004-12.64, Contra Costa, CA

Built 1962 ADT: 165,000

INTERSTATE 680

Over: CENTER AVE

04-CC-680-20.38, Contra Costa, CA

Built 1962 ADT: 6,300

STATE ROUTE 4

Over: PACHECO BLVD

04-CC-004-12.41, Contra Costa, CA

Built 1962 ADT: 15,000

HILLCREST AVE NB

Over: STATE ROUTE 4

04-CC-004-R28.94-ANT, Contra Costa, CA

Built 1997 ADT: 94,000

HILLCREST AVE SB

Over: STATE ROUTE 4

04-CC-004-R28.90-ANT, Contra Costa, CA

Built 1971 ADT: 94,000

SB SR 242 ON-RAMP

Over: CONCORD AVENUE

04-CC-242-R1.40-CND, Contra Costa, CA

Built 1996 ADT: 33,549

WILDER ROAD

Over: STATE ROUTE 24

04-CC-024-1.20, Contra Costa, CA

Built 1964 ADT: 159,000

W4-W80 CONNECTOR

Over: STATE ROUTE 4

04-CC-004-0.20-HER, Contra Costa, CA

Built 1958 ADT: 40,500

E4-E80 CONNECTOR

Over: STATE ROUTE 4

04-CC-004-L0.15-HER, Contra Costa, CA

Built 1958 ADT: 40,500

INTERSTATE 680

Over: CONCORD AVE

04-CC-680-19.86-CND, Contra Costa, CA

Built 1962 ADT: 10,500

INTERSTATE 680

Over: LIVORNA ROAD

04-CC-680-R11.28-ALMO, Contra Costa, CA

Built 1964 ADT: 7,052

SYCAMORE VALLEY RD

Over: INTERSTATE 680

04-CC-680-R6.76-DNVL, Contra Costa, CA

Built 1964 ADT: 192,200

INTERSTATE 680

Over: DIABLO ROAD

04-CC-680-R7.55-DNVL, Contra Costa, CA

Built 1964 ADT: 24,300

INTERSTATE 680

Over: EL CERRO BOULEVARD

04-CC-680-R8.18-DNVL, Contra Costa, CA

Built 1964 ADT: 18,862

INTERSTATE 680

Over: STONE VALLEY ROAD

04-CC-680-R10.37, Contra Costa, CA

Built 1964 ADT: 7,000

STATE ROUTE 4 WB

Over: BAILEY ROAD

04-CC-004-R20.10, Contra Costa, CA

Built 1995 ADT: 15,000

STATE ROUTE 4 EB

Over: BAILEY ROAD

04-CC-004-R20.10, Contra Costa, CA

Built 1994 ADT: 15,000

NORRIS CANYON ROAD

Over: INTERSTATE 680

04-CC-680-R3.76-SRMN, Contra Costa, CA

Built 1966 ADT: 170,100

CROW CANYON ROAD

Over: INTERSTATE 680

04-CC-680-R4.18-SRMN, Contra Costa, CA

Built 1966 ADT: 172,000

STATE ROUTE 242

Over: SOLANO WAY

04-CC-242-R2.15-CND, Contra Costa, CA

Built 1963 ADT: 16,900

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026