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:

I 580 EB

Over: CASTRO STREET

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

Built 1988 ADT: 3,000

I 580 WB

Over: CASTRO STREET

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

Built 1990 ADT: 3,000

CANAL&CASTRO-W580

Over: CASTRO STREET

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

Built 1990 ADT: 3,000

HARBOUR WAY

Over: INTERSTATE 580

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

Built 1989 ADT: 87,000

RICHMOND PARKWAY

Over: INTERSTATE 80

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

Built 1997 ADT: 179,000

S680-OLYMPIC OFFRP

Over: E24-S680 CONNECTOR RAMP

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

Built 1999 ADT: 25,000

STATE ROUTE 4 WB

Over: WILLOW PASS ROAD

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

Built 1995 ADT: 27,237

STATE ROUTE 4 EB

Over: WILLOW PASS ROAD

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

Built 1995 ADT: 27,237

OAKLAND BOULEVARD

Over: N680&E24-YGNACIO OFF RMP

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

Built 1997 ADT: 5,300

FOSTORIA PARKWAY

Over: INTERSTATE 680

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

Built 1992 ADT: 176,400

PEDESTRIAN ACCESS

Over: STATE ROUTE 4 EB

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

Built 1997 ADT: 127,000

BART ACCESS ROAD

Over: E4-BAILEY RD OFF RAMP

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

Built 1997 ADT: 5,500

CONTRA COSTA BL NB

Over: CONTRA COSTA-S680 ON RMP

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

Built 1998 ADT: 25,000

N680-CC BLVD RAMP

Over: INTERSTATE 680

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

Built 1998 ADT: 235,000

WILLOW AVE

Over: STATE ROUTE 4

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

Built 1997 ADT: 40,500

INTERSTATE 680 NB

Over: UPRR,MARINA VISTA,MOCOCO

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

Built 2006 ADT: 500

CLAEYS LANE

Over: STATE ROUTE 4

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

Built 2001 ADT: 42,500

INTERSTATE 80 WB

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

Over: WANDA, POMONA, VIRGINIA

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

Built 2003 ADT: 7,353

EB80-POMONA ST OFF

Over: POMONA ST, WANDA ST

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

Built 2003 ADT: 1,500

STATE ROUTE 4

Over: SAN JOSE AVENUE

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

Built 2003 ADT: 450

STATE ROUTE 4 EB

Over: SAN JOSE AVENUE

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

Built 2013 ADT: 450

STATE ROUTE 4 WB

Over: SAND CREEK ROAD

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

Built 2014 ADT: 5,000

STATE ROUTE 4 EB

Over: SAND CREEK ROAD

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

Built 2013 ADT: 5,000

HARBOR STREET

Over: STATE ROUTE 4

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

Built 2003 ADT: 114,000

RAILROAD AVENUE

Over: STATE ROUTE 4

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

Built 2004 ADT: 127,000

CALIFORNIA STREET

Over: INTERSTATE 80

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

Built 2006 ADT: 115,000

E4-N160 CONNECTOR

Over: STATE ROUTE 4

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

Built 2005 ADT: 45,000

LAUREL ROAD

Over: STATE ROUTE 4

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

Built 2008 ADT: 40,000

STATE ROUTE 4 WB

Over: LONE TREE WAY

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

Built 2008 ADT: 22,300

STATE ROUTE 4 EB

Over: LONE TREE WAY

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

Built 2013 ADT: 22,300

LOVERIDGE ROAD

Over: STATE ROUTE 4

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

Built 2014 ADT: 114,000

WB ROUTE 4 OFFRAMP

Over: SOMERSVILLE ROAD

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

Built 2012 ADT: 65,000

STATE ROUTE 4 WB

Over: SOMERSVILLE ROAD

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

Built 2013 ADT: 65,000

STATE ROUTE 4 EB

Over: SOMERSVILLE ROAD

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

Built 2013 ADT: 65,000

STATE ROUTE 4 WB

Over: CONTRA LOMA BLVD

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

Built 2015 ADT: 12,445

STATE ROUTE 4 EB

Over: CONTRA LOMA BLVD

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

Built 2015 ADT: 12,445

G STREET

Over: STATE ROUTE 4

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

Built 2014 ADT: 114,000

STATE ROUTE 4 WB

Over: A STREET

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

Built 2016 ADT: 28,921

STATE ROUTE 4 EB

Over: A STREET

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

Built 2016 ADT: 28,921

STATE ROUTE 4 WB

Over: CAVALLO ROAD

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

Built 2016 ADT: 10,000

STATE ROUTE 4 EB

Over: CAVALLO ROAD

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

Built 2016 ADT: 10,000

PEDESTRIAN WALKWAY

Over: INTERSTATE 80

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

Built 2016 ADT: 179,000

PEDESTRIAN ACCESS

Over: STATE ROUTE 4 WB

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

Built 2016 ADT: 47,000

S160-E4 CONNECTOR

Over: E4-N160 CONNECT, UPRR

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

Built 2016 ADT: 13,600

S160-E4 CONNECTOR

Over: ROUTE 4

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

Built 2016 ADT: 23,900

STATE ROUTE 4

Over: BALFOUR ROAD

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

Built 2018 ADT: 18,000

NONE

Over: STATE ROUTE 160 NB

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

Built 1978 ADT: 6,650

TOLL PLAZA CANOPY

Over: INTERSTATE 680 NB

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

Built 2007 ADT: 99,000

BNSF,AMTRAK,UP RR

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 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