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)

HARRIET DR

Good

Over: GRAYSON CREEK

AT RUTH DR, Contra Costa, CA

Built 1957 Load: 27.5 t ADT: 800

WALNUT BLVD

Good

Over: E CONTRA COSTA ID CANAL

0.5 MI S BALFOUR RD, Contra Costa, CA

Built 1968 Load: 28.5 t ADT: 13,086

FOURTH ST

Good

Over: RODEO CREEK

0.1 MI E PARKER AVE, Contra Costa, CA

Built 1986 Load: 28.5 t ADT: 4,279

OLYMPIC BLVD

Good

Over: LAS TRAMPAS CREEK

0.1 MI SW OF I-680, Contra Costa, CA

Built 1963 Load: 28.8 t ADT: 21,623

SELLERS AVE

Good

Over: E CONTRA COSTA ID CANAL

0.4 MI N OF SR 4, Contra Costa, CA

Built 1967 Load: 29.5 t ADT: 3,309

RUMRILL BLVD

Good

Over: SAN PABLO CREEK

AT BROOKSIDE DR, Contra Costa, CA

Built 2012 Load: 30.1 t ADT: 18,800

BYRON HWY

Good

Over: E CONTRA COSTA ID CANAL

0.5 MI NORTH OF SR 4, Contra Costa, CA

Built 1968 Load: 30.5 t ADT: 3,727

THIRD ST

Good

Over: RODEO CREEK

JUST E RAILROAD AVE, Contra Costa, CA

Built 1965 Load: 30.5 t ADT: 725

S160-W4 CONNECTOR

Good

Over: UP RR

04-CC-160-0.25, Contra Costa, CA

Built 1971 Load: 30.8 t ADT: 11,950

DIABLO RD-S680 ON

Good

Over: SAN RAMON CREEK

04-CC-680-R7.43, Contra Costa, CA

Built 1975 Load: 30.8 t ADT: 4,750

MOTA DRIVE

Good

Over: CONTRA COSTA CANAL

0.1 MI SW RIVERSIDE DR, Contra Costa, CA

Built 1985 Load: 31.1 t ADT: 2,355

EUCLID AVENUE

Good

Over: CONTRA COSTA CANAL

AT 6TH ST, E OF SR 242, Contra Costa, CA

Built 2003 Load: 31.4 t ADT: 1,000

CENTER AVENUE

Good

Over: GRAYSON CREEK

0.1 MI W PACHECO BLVD, Contra Costa, CA

Built 1970 Load: 31.8 t ADT: 6,706

STATE ROUTE 24

Good

Over: DOLORES DRIVE

04-CC-024-R5.84-LFYT, Contra Costa, CA

Built 1957 Load: 32.1 t ADT: 79,500

INTERSTATE 680

Good

Over: ARTHUR ROAD

04-CC-680-22.70, Contra Costa, CA

Built 1962 Load: 32.1 t ADT: 105,000

Byron Highway

Good

Over: Delta-Mendota Canal

0.3 MI N Alameda CL, Contra Costa, CA

Built 1953 Load: 32.4 t ADT: 6,500

STATE ROUTE 4 WB

Good

Over: CONTRA COSTA CANAL

04-CC-004-R20.32, Contra Costa, CA

Built 1997 Load: 32.4 t ADT: 63,500

STATE ROUTE 4 EB

Good

Over: CONTRA COSTA CANAL

04-CC-004-R20.32, Contra Costa, CA

Built 1997 Load: 32.4 t ADT: 63,500

STATE ROUTE 242

Good

Over: HOLBROOK CHANNEL

04-CC-242-R2.65-CND, Contra Costa, CA

Built 1978 Load: 32.4 t ADT: 100,000

INTERSTATE 680 NB

Good

Over: UP,BNSF,AMTRAK,SUISUN BA

04-CC-680-R25.04R-MTZ, Contra Costa, CA

Built 2007 Load: 32.4 t ADT: 105,000

WILLOW PASS ROAD

Good

Over: PINE CREEK

04-CC-242-R0.90-CND, Contra Costa, CA

Built 1963 Load: 32.4 t ADT: 22,357

S680 ON-MARINA VIS

Good

Over: MARSH WETLANDS

04-CC-680-24.30, Contra Costa, CA

Built 2016 Load: 32.4 t ADT: 2,650

SB 680-WB 4 CONN

Good

Over: BLUM ROAD

04-CC-680-21.50, Contra Costa, CA

Built 2005 Load: 32.4 t ADT: 14,100

INTERSTATE 680

Good

Over: E MARTINEZ DRAIN

04-CC-680-22.27, Contra Costa, CA

Built 1962 Load: 32.4 t ADT: 118,000

INTERSTATE 680

Good

Over: SOUTH MOCOCO DRAIN

04-CC-680-23.99, Contra Costa, CA

Built 1962 Load: 32.4 t ADT: 105,000

INTERSTATE 80

Good

Over: BARTD

04-CC-080-2.50-RCH, Contra Costa, CA

Built 1970 Load: 32.4 t ADT: 179,000

I-580 W ON RAMP

Good

Over: CENTRAL AVE

04-CC-580-0.25-RCH, Contra Costa, CA

Built 1991 Load: 32.4 t ADT: 4,400

I-580 ON RAMP

Good

Over: CENTRAL AVE

04-CC-580-0.34-RCH, Contra Costa, CA

Built 1991 Load: 32.4 t ADT: 4,400

STATE ROUTE 4 WB

Good

Over: WALNUT CREEK

04-CC-004-R13.40, Contra Costa, CA

Built 1981 Load: 32.4 t ADT: 41,300

STATE ROUTE 4 EB

Good

Over: WALNUT CREEK

04-CC-004-R13.40, Contra Costa, CA

Built 1981 Load: 32.4 t ADT: 41,300

PACHECO BLVD

Good

Over: E MARTINEZ DRAIN

04-CC-680-22.54, Contra Costa, CA

Built 1962 Load: 32.4 t ADT: 1,000

INTERSTATE 680

Good

Over: GREEN VALLEY CREEK

04-CC-680-R7.64, Contra Costa, CA

Built 1964 Load: 32.4 t ADT: 190,100

BAYVIEW-W580 ONRMP

Good

Over: NONE

04-CC-580-1.23, Contra Costa, CA

Built 1987 Load: 32.4 t ADT: 3,600

BAILEY RD-W4 ONRMP

Good

Over: CONTRA COSTA CANAL

04-CC-004-R20.02, Contra Costa, CA

Built 1997 Load: 32.4 t ADT: 47,000

STATE ROUTE 4 WB

Good

Over: BNSF RY & AMTRAK

04-CC-004-R3.66L-MTZ, Contra Costa, CA

Built 2001 Load: 32.4 t ADT: 21,750

ROUTE 580 WB

Good

Over: HILLSIDE

04-CC-580-5.78-RCH, Contra Costa, CA

Built 1989 Load: 32.4 t ADT: 68,000

WB80-POMONA ST OFF

Good

Over: DOWRELIO DR

04-CC-080-13.76-VAL, Contra Costa, CA

Built 2003 Load: 32.4 t ADT: 1,400

STATE ROUTE 4 WB

Good

Over: FRANKLIN CANYON RD

04-CC-004-R2.70L, Contra Costa, CA

Built 2001 Load: 32.4 t ADT: 40,500

STATE ROUTE 4 EB

Good

Over: SAND CREEK

04-CC-004-M34.40, Contra Costa, CA

Built 2013 Load: 32.4 t ADT: 7,700

STATE ROUTE 4 WB

Good

Over: CONTRA COSTA CANAL

04-CC-004-R31.28-ANT, Contra Costa, CA

Built 2008 Load: 32.4 t ADT: 20,000

STATE ROUTE 4 EB

Good

Over: CONTRA COSTA CANAL

04-CC-004-R31.27-ANT, Contra Costa, CA

Built 2008 Load: 32.4 t ADT: 20,000

FAIRVIEW AVE

Good

Over: STATE ROUTE 4

04-CC-004-R37.00-BTWD, Contra Costa, CA

Built 2009 Load: 32.4 t ADT: 15,400

STATE ROUTE 4

Good

Over: MARSH CREEK

04-CC-004-R37.70-BTWD, Contra Costa, CA

Built 2009 Load: 32.4 t ADT: 15,400

STATE ROUTE 4 EB

Good

Over: CENTURY BLVD

04-CC-004-25.00-ANT, Contra Costa, CA

Built 2013 Load: 32.4 t ADT: 57,000

STATE ROUTE 4

Good

Over: DEER CREEK

04-CC-004-R35.47-BTWD, Contra Costa, CA

Built 2018 Load: 32.4 t ADT: 45,500

W4-N160 CONNECTOR

Good

Over: UPRR TRACKS

04-CC-160-L0.43R-ANT, Contra Costa, CA

Built 2016 Load: 32.4 t ADT: 11,400

STATE ROUTE 4

Good

Over: GRAYSON CREEK

04-CC-004-12.89, Contra Costa, CA

Built 2021 Load: 32.4 t ADT: 82,600

INTERSTATE RTE 580

Good

Over: STEGE DRAIN

04-CC-580-1.17-RCH, Contra Costa, CA

Built 2022 Load: 32.4 t ADT: 92,300

ESCOBAR ST

Good

Over: ARROYO DEL HAMBRE

AT CASTRO STREET, Contra Costa, CA

Built 1987 Load: 32.4 t ADT: 4,900

MARKET ST

Good

Over: PINE CREEK

AT CLAYTON ST, Contra Costa, CA

Built 1972 Load: 32.4 t ADT: 16,169

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.