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:

ALCOSTA BOULEVARD

Over: INTERSTATE 680

04-CC-680-R0.01-SRMN, Contra Costa, CA

Built 1965 ADT: 181,700

CENTER AVENUE

Over: STATE ROUTE 4

04-CC-004-R9.18-MTZ, Contra Costa, CA

Built 1975 ADT: 62,000

CUMMINGS SKYWAY

Over: STATE ROUTE 4

04-CC-004-R4.89, Contra Costa, CA

Built 1967 ADT: 43,500

STATE ROUTE 4 WB

Over: ALHAMBRA AVE

04-CC-004-R8.55-MTZ, Contra Costa, CA

Built 1967 ADT: 70,000

STATE ROUTE 4 EB

Over: ALHAMBRA AVE

04-CC-004-R8.55-MTZ, Contra Costa, CA

Built 1967 ADT: 70,000

STATE ROUTE 4 WB

Over: MCEWEN ROAD

04-CC-004-R5.17, Contra Costa, CA

Built 1967 ADT: 75

STATE ROUTE 4 EB

Over: MCEWEN ROAD

04-CC-004-R5.17, Contra Costa, CA

Built 1967 ADT: 75

STATE ROUTE 4 WB

Over: ALHAMBRA WAY

04-CC-004-R8.75-MTZ, Contra Costa, CA

Built 1967 ADT: 59,000

STATE ROUTE 4 EB

Over: ALHAMBRA WAY

04-CC-004-R8.75-MTZ, Contra Costa, CA

Built 1967 ADT: 59,000

MILANO WAY

Over: STATE ROUTE 4

04-CC-004-R11.13-MTZ, Contra Costa, CA

Built 1975 ADT: 62,000

STATE ROUTE 4 WB

Over: MORELLO AVE

04-CC-004-R10.33-MTZ, Contra Costa, CA

Built 1975 ADT: 15,000

STATE ROUTE 4 EB

Over: MORELLO AVE

04-CC-004-R10.33-MTZ, Contra Costa, CA

Built 1975 ADT: 15,000

INTERSTATE 680

Over: PINE VALLEY ROAD

04-CC-680-R1.09-SRMN, Contra Costa, CA

Built 1966 ADT: 2,950

INTERSTATE 680

Over: MONTEVIDEO DRIVE

04-CC-680-R1.89-SRMN, Contra Costa, CA

Built 1966 ADT: 5,920

GREENBROOK DRIVE

Over: INTERSTATE 680

04-CC-680-R5.33-DNVL, Contra Costa, CA

Built 1966 ADT: 176,400

BOLLINGER CYN RD

Over: INTERSTATE 680

04-CC-680-R2.88-SRMN, Contra Costa, CA

Built 1966 ADT: 181,700

STATE ROUTE 24

Over: FIRST STREET

04-CC-024-R6.51-LFYT, Contra Costa, CA

Built 1970 ADT: 1,200

STATE ROUTE 24

Over: FIRST STREET

04-CC-024-R6.51-LFYT, Contra Costa, CA

Built 1970 ADT: 1,200

STATE ROUTE 24

Over: FIRST STREET

04-CC-024-R6.51-LFYT, Contra Costa, CA

Built 1971 ADT: 1,200

CENTRAL AVENUE

Over: INTERSTATE 580

04-CC-580-0.24-RCH, Contra Costa, CA

Built 1991 ADT: 84,500

STATE ROUTE 4 WB

Over: SOLANO WAY

04-CC-004-R13.65, Contra Costa, CA

Built 1981 ADT: 5,500

STATE ROUTE 4 EB

Over: SOLANO WAY

04-CC-004-R13.65, Contra Costa, CA

Built 1981 ADT: 5,500

STATE ROUTE 4 WB

Over: PERALTA ROAD

04-CC-004-R13.96-CND, Contra Costa, CA

Built 1981 ADT: 4,500

STATE ROUTE 4 EB

Over: PERALTA ROAD

04-CC-004-R13.96-CND, Contra Costa, CA

Built 1978 ADT: 4,500

STATE ROUTE 4 WB

Over: W4-S242 CONNECTOR RAMP

04-CC-004-R14.64-CND, Contra Costa, CA

Built 1978 ADT: 100,000

STATE ROUTE 4 EB

Over: W4-S242 CONNECTOR RAMP

04-CC-004-R14.62-CND, Contra Costa, CA

Built 1978 ADT: 100,000

E4-PORT CHICAGO

Over: W4-S242 & N242-E4 CONNS

04-CC-004-R14.61-CND, Contra Costa, CA

Built 1978 ADT: 100,000

STATE ROUTE 4 WB

Over: PORT CHICAGO HWY

04-CC-004-R15.42-CND, Contra Costa, CA

Built 1976 ADT: 15,792

STATE ROUTE 4 EB

Over: PORT CHICAGO HWY

04-CC-004-R15.42-CND, Contra Costa, CA

Built 1976 ADT: 15,792

STATE ROUTE 4 WB

Over: WILLOW PASS ROAD

04-CC-004-R16.83, Contra Costa, CA

Built 1975 ADT: 22,357

STATE ROUTE 4 EB

Over: WILLOW PASS ROAD

04-CC-004-R16.83, Contra Costa, CA

Built 1976 ADT: 22,357

OLIVERA ROAD

Over: STATE ROUTE 242

04-CC-242-R2.79-CND, Contra Costa, CA

Built 1978 ADT: 100,000

N242-W4 CONNECTOR

Over: STATE ROUTES 4 & 242

04-CC-242-R3.24-CND, Contra Costa, CA

Built 1978 ADT: 80,000

PEDESTRIAN WALKWAY

Over: SR 24 ON & OFF-RAMPS

04-CC-024-R2.40-ORIN, Contra Costa, CA

Built 1969 ADT: 161,300

BARTD AERIAL C007

Over: INTERSTATE 680

04-CC-680-14.46-WLC, Contra Costa, CA

Built 1968 ADT: 235,000

BAYVIEW AVENUE OC

Over: INTERSTATE 580

04-CC-580-1.21, Contra Costa, CA

Built 1987 ADT: 84,500

SOUTH 23RD ST

Over: INTERSTATE 580

04-CC-580-R2.89-RCH, Contra Costa, CA

Built 1987 ADT: 87,000

MARINA WAY OC

Over: INTERSTATE 580

04-CC-580-R3.35-RCH, Contra Costa, CA

Built 1989 ADT: 87,000

CUTTING BLVD

Over: INTERSTATE 580

04-CC-580-R3.79-RCH, Contra Costa, CA

Built 1989 ADT: 69,000

INTERSTATE 580

Over: BNSF RY, SOUTH SECOND ST

04-CC-580-R4.09-RCH, Contra Costa, CA

Built 1990 ADT: 3,000

INTERSTATE 580

Over: CANAL BOULEVARD

04-CC-580-R4.64-RCH, Contra Costa, CA

Built 1991 ADT: 1,200

HILLTOP DRIVE WB

Over: INTERSTATE 80

04-CC-080-5.99-RCH, Contra Costa, CA

Built 1977 ADT: 3,000

HILLTOP DRIVE EB

Over: INTERSTATE 80

04-CC-080-5.99-RCH, Contra Costa, CA

Built 2009 ADT: 3,000

EAST PORTAL BLDG

Over: STATE ROUTE 24

04-CC-024-R0.28, Contra Costa, CA

Built 1964 ADT: 155,000

BNSF RY

Over: STATE ROUTE 4

04-CC-004-R1.00, Contra Costa, CA

Built 1985 ADT: 42,500

BNSF RY

Over: INTERSTATE 580

04-CC-580-R2.00-RCH, Contra Costa, CA

Built 1988 ADT: 87,000

BNSF RY

Over: INTERSTATE 580

04-CC-580-R2.06-RCH, Contra Costa, CA

Built 1988 ADT: 87,000

ERLANDSON ST

Over: INTERSTATE ROUTE 580

04-CC-580-R2.09-RCH, Contra Costa, CA

Built 1988 ADT: 87,000

APPIAN WAY NB

Over: INTERSTATE 80

04-CC-080-7.62-PIN, Contra Costa, CA

Built 1985 ADT: 190,000

STATE ROUTE 242

Over: CLAYTON ROAD-S242 ON RMP

04-CC-242-R0.78-CND, Contra Costa, CA

Built 1986 ADT: 1,000

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