Contra Costa County, CA

686 public highway bridges

Contra Costa County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Contra Costa County, California contains 686 public highway bridges. Roughly 29.7% are rated “Good,” 26.1% “Fair,” and 5.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

686
Total Bridges
29.7%
Good
26.1%
Fair
5.5%
Poor Condition

Condition Distribution

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

All Bridges (686)

I 580 EB

Unknown

Over: CASTRO STREET

04-CC-580-R5.11-RCH, Contra Costa, CA

Built 1988 ADT: 3,000

I 580 WB

Unknown

Over: CASTRO STREET

04-CC-580-R5.11-RCH, Contra Costa, CA

Built 1990 ADT: 3,000

CANAL&CASTRO-W580

Unknown

Over: CASTRO STREET

04-CC-580-R5.11-RCH, Contra Costa, CA

Built 1990 ADT: 3,000

HARBOUR WAY

Unknown

Over: INTERSTATE 580

04-CC-580-R3.60-RCH, Contra Costa, CA

Built 1989 ADT: 87,000

RICHMOND PARKWAY

Unknown

Over: INTERSTATE 80

04-CC-080-6.70-PIN, Contra Costa, CA

Built 1997 ADT: 179,000

S680-OLYMPIC OFFRP

Unknown

Over: E24-S680 CONNECTOR RAMP

04-CC-680-14.07-WLC, Contra Costa, CA

Built 1999 ADT: 25,000

STATE ROUTE 4 WB

Unknown

Over: WILLOW PASS ROAD

04-CC-004-R18.76, Contra Costa, CA

Built 1995 ADT: 27,237

STATE ROUTE 4 EB

Unknown

Over: WILLOW PASS ROAD

04-CC-004-R18.76, Contra Costa, CA

Built 1995 ADT: 27,237

OAKLAND BOULEVARD

Unknown

Over: N680&E24-YGNACIO OFF RMP

04-CC-680-14.56-WLC, Contra Costa, CA

Built 1997 ADT: 5,300

FOSTORIA PARKWAY

Unknown

Over: INTERSTATE 680

04-CC-680-R4.38-SRMN, Contra Costa, CA

Built 1992 ADT: 176,400

PEDESTRIAN ACCESS

Unknown

Over: STATE ROUTE 4 EB

04-CC-004-R19.96, Contra Costa, CA

Built 1997 ADT: 127,000

BART ACCESS ROAD

Unknown

Over: E4-BAILEY RD OFF RAMP

04-CC-004-R19.98, Contra Costa, CA

Built 1997 ADT: 5,500

CONTRA COSTA BL NB

Unknown

Over: CONTRA COSTA-S680 ON RMP

04-CC-680-R17.44-PLHL, Contra Costa, CA

Built 1998 ADT: 25,000

N680-CC BLVD RAMP

Unknown

Over: INTERSTATE 680

04-CC-680-R17.40-PLHL, Contra Costa, CA

Built 1998 ADT: 235,000

WILLOW AVE

Unknown

Over: STATE ROUTE 4

04-CC-004-R0.71-HER, Contra Costa, CA

Built 1997 ADT: 40,500

INTERSTATE 680 NB

Unknown

Over: UPRR,MARINA VISTA,MOCOCO

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

Built 2006 ADT: 500

CLAEYS LANE

Unknown

Over: STATE ROUTE 4

04-CC-004-R1.70, Contra Costa, CA

Built 2001 ADT: 42,500

INTERSTATE 80 WB

Unknown

Over: SAN PABLO, ETC., UP RR

04-CC-080-13.62-VAL, Contra Costa, CA

Built 2003 ADT: 2,020

POMONA ST-WB 80 ON

Unknown

Over: WANDA, POMONA, VIRGINIA

04-CC-080-13.48, Contra Costa, CA

Built 2003 ADT: 7,353

EB80-POMONA ST OFF

Unknown

Over: POMONA ST, WANDA ST

04-CC-080-13.48, Contra Costa, CA

Built 2003 ADT: 1,500

STATE ROUTE 4

Unknown

Over: SAN JOSE AVENUE

04-CC-004-M34.90, Contra Costa, CA

Built 2003 ADT: 450

STATE ROUTE 4 EB

Unknown

Over: SAN JOSE AVENUE

04-CC-004-M34.90, Contra Costa, CA

Built 2013 ADT: 450

STATE ROUTE 4 WB

Unknown

Over: SAND CREEK ROAD

04-CC-004-M34.50, Contra Costa, CA

Built 2014 ADT: 5,000

STATE ROUTE 4 EB

Unknown

Over: SAND CREEK ROAD

04-CC-004-M34.50, Contra Costa, CA

Built 2013 ADT: 5,000

HARBOR STREET

Unknown

Over: STATE ROUTE 4

04-CC-004-23.41-PIT, Contra Costa, CA

Built 2003 ADT: 114,000

RAILROAD AVENUE

Unknown

Over: STATE ROUTE 4

04-CC-004-23.04-PIT, Contra Costa, CA

Built 2004 ADT: 127,000

CALIFORNIA STREET

Unknown

Over: INTERSTATE 80

04-CC-080-11.34, Contra Costa, CA

Built 2006 ADT: 115,000

E4-N160 CONNECTOR

Unknown

Over: STATE ROUTE 4

04-CC-004-R30.20-ANT, Contra Costa, CA

Built 2005 ADT: 45,000

LAUREL ROAD

Unknown

Over: STATE ROUTE 4

04-CC-004-R31.37-ANT, Contra Costa, CA

Built 2008 ADT: 40,000

STATE ROUTE 4 WB

Unknown

Over: LONE TREE WAY

04-CC-004-R32.94-BTWD, Contra Costa, CA

Built 2008 ADT: 22,300

STATE ROUTE 4 EB

Unknown

Over: LONE TREE WAY

04-CC-004-R32.90-BTWD, Contra Costa, CA

Built 2013 ADT: 22,300

LOVERIDGE ROAD

Unknown

Over: STATE ROUTE 4

04-CC-004-24.31-PIT, Contra Costa, CA

Built 2014 ADT: 114,000

WB ROUTE 4 OFFRAMP

Unknown

Over: SOMERSVILLE ROAD

04-CC-004-26.01-ANT, Contra Costa, CA

Built 2012 ADT: 65,000

STATE ROUTE 4 WB

Unknown

Over: SOMERSVILLE ROAD

04-CC-004-26.01-ANT, Contra Costa, CA

Built 2013 ADT: 65,000

STATE ROUTE 4 EB

Unknown

Over: SOMERSVILLE ROAD

04-CC-004-26.01-ANT, Contra Costa, CA

Built 2013 ADT: 65,000

STATE ROUTE 4 WB

Unknown

Over: CONTRA LOMA BLVD

04-CC-004-26.93-ANT, Contra Costa, CA

Built 2015 ADT: 12,445

STATE ROUTE 4 EB

Unknown

Over: CONTRA LOMA BLVD

04-CC-004-26.93-ANT, Contra Costa, CA

Built 2015 ADT: 12,445

G STREET

Unknown

Over: STATE ROUTE 4

04-CC-004-27.29-ANT, Contra Costa, CA

Built 2014 ADT: 114,000

STATE ROUTE 4 WB

Unknown

Over: A STREET

04-CC-004-R27.78-ANT, Contra Costa, CA

Built 2016 ADT: 28,921

STATE ROUTE 4 EB

Unknown

Over: A STREET

04-CC-004-R27.78-ANT, Contra Costa, CA

Built 2016 ADT: 28,921

STATE ROUTE 4 WB

Unknown

Over: CAVALLO ROAD

04-CC-004-R28.23-ANT, Contra Costa, CA

Built 2016 ADT: 10,000

STATE ROUTE 4 EB

Unknown

Over: CAVALLO ROAD

04-CC-004-R28.23-ANT, Contra Costa, CA

Built 2016 ADT: 10,000

PEDESTRIAN WALKWAY

Unknown

Over: INTERSTATE 80

04-CC-080-4.06-SPB, Contra Costa, CA

Built 2016 ADT: 179,000

PEDESTRIAN ACCESS

Unknown

Over: STATE ROUTE 4 WB

04-CC-004-R29.23-ANT, Contra Costa, CA

Built 2016 ADT: 47,000

S160-E4 CONNECTOR

Unknown

Over: E4-N160 CONNECT, UPRR

04-CC-160-L0.41R-ANT, Contra Costa, CA

Built 2016 ADT: 13,600

S160-E4 CONNECTOR

Unknown

Over: ROUTE 4

04-CC-160-L0.40R-ANT, Contra Costa, CA

Built 2016 ADT: 23,900

STATE ROUTE 4

Unknown

Over: BALFOUR ROAD

04-CC-004-R35.57-BTWD, Contra Costa, CA

Built 2018 ADT: 18,000

NONE

Unknown

Over: STATE ROUTE 160 NB

04-CC-160-0.70, Contra Costa, CA

Built 1978 ADT: 6,650

TOLL PLAZA CANOPY

Unknown

Over: INTERSTATE 680 NB

04-CC-680-R24.5R-MTZ, Contra Costa, CA

Built 2007 ADT: 99,000

BNSF,AMTRAK,UP RR

Unknown

Over: WILLOW PASS ROAD

0.1 MI N OF N PARKSIDE DR, Contra Costa, CA

Built 1918 ADT: 14,099

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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.