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)

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.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial