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:

RICHMOND PARKWAY

Over: PARKWAY WETLANDS

3.6 MI SW OF I-80, Contra Costa, CA

Built 1995 Load: 32.4 t ADT: 27,000

SOMERSVILLE ROAD

Over: WEST ANTIOCH CREEK

0.05 MI W OF "O" STREET, Contra Costa, CA

Built 1992 Load: 32.4 t ADT: 6,000

ARMSTRONG ROAD

Over: BRUSHY CREEK

0.3 MI W BYRON HOT SPRING, Contra Costa, CA

Built 1998 Load: 32.4 t ADT: 380

BETHEL ISLAND ROAD

Over: DUTCH SLOUGH

1.5 MI N. OF E CYPRESS RD, Contra Costa, CA

Built 2010 Load: 32.4 t ADT: 5,881

EL PORTAL DRIVE

Over: SAN PABLO CREEK

0.1 MI EAST OF I-80, Contra Costa, CA

Built 2013 Load: 32.4 t ADT: 10,500

PITTSB-ANTIOCH HWY

Over: KIRKER CREEK

0.6 MI E OF HARBOR ST, Contra Costa, CA

Built 2005 Load: 32.4 t ADT: 10,610

MANZANITA DRIVE

Over: SAN PABLO CREEK

0.2 MI E OF CAMINO PABLO, Contra Costa, CA

Built 2014 Load: 32.4 t ADT: 612

DEER VALLEY ROAD

Over: CONTRA COSTA CANAL

1 MI. S. OF HWY 4, Contra Costa, CA

Built 1988 Load: 32.4 t ADT: 1,000

BARMOUTH DRIVE

Over: CONTRA COSTA CANAL

0.4 MI. S.OF DAVISON RD, Contra Costa, CA

Built 1985 Load: 32.4 t ADT: 500

BLYTHE DRIVE

Over: CONTRA COSTA CANAL

0.03 MI S JAMES DONLON BL, Contra Costa, CA

Built 1989 Load: 32.4 t ADT: 1,000

DOUGHERTY ROAD

Over: WEST BRANCH ALAMO CREEK

1.0 MI S. OF BOLLINGER CY, Contra Costa, CA

Built 2015 Load: 32.4 t ADT: 2,760

ALHAMBRA VALLEY RD

Over: PINOLE CREEK

65 FT E. CASTRO RANCH RD, Contra Costa, CA

Built 2017 Load: 32.4 t ADT: 1,000

CRESTVIEW DR

Over: CONTRA COSTA CANAL

2.2 MI W RAILROAD AVE, Contra Costa, CA

Built 1981 Load: 32.4 t ADT: 5,000

HENRY AVENUE

Over: PINOLE CREEK

.13 MI E OF PINOLE VLY RD, Contra Costa, CA

Built 1986 Load: 32.4 t ADT: 1,000

BAYFRONT BLVD

Over: REFUGIO CREEK

AT JOHN MUIR PKWY, Contra Costa, CA

Built 2020 Load: 32.4 t ADT: 1,000

MT. DIABLO BLVD

Over: SAN RAMON CREEK BYPASS

0.25 MI E. OF S. BROADWAY, Contra Costa, CA

Built 1986 Load: 32.4 t ADT: 15,300

WEST TENTH STREET

Over: WEST ANTIOCH CREEK

WEST OF O STREET, Contra Costa, CA

Built 2017 Load: 32.4 t ADT: 17,298

WILDER ROAD

Over: BROOKSIDE CREEK TRIB

SOUTH OF WINDY CREEK WAY, Contra Costa, CA

Built 2012 Load: 32.4 t ADT: 100

WILDER ROAD

Over: BROOKSIDE CREEK TRIB

SOUTH OF DAIRY CREEK LANE, Contra Costa, CA

Built 2012 Load: 32.4 t ADT: 100

STATE ROUTE 24 WB

Over: WALNUT CREEK UC (BARTD)

04-CC-024-R8.31, Contra Costa, CA

Built 1970 Load: 32.6 t ADT: 79,500

GREEN STREET

Over: ARROYO DEL HAMBRE

AT FERRY STREET, Contra Costa, CA

Built 1940 Load: 33.0 t ADT: 3,000

STATE ROUTE 24 EB

Over: LAFAYETTE STA PUC(BARTD)

04-CC-024-R6.08-LFYT, Contra Costa, CA

Built 1971 Load: 33.4 t ADT: 79,500

OLD TUNNEL RD

Over: RELIEZ CREEK

0.1 MI E PLEASANT HILL RD, Contra Costa, CA

Built 1971 Load: 33.4 t ADT: 3,100

SIMAS AVE

Over: PINOLE CREEK

0.1 MI E OF PINOLE VAL RD, Contra Costa, CA

Built 1966 Load: 33.7 t ADT: 1,300

WEST LELAND RD

Over: CONTRA COSTA CANAL

1.5 MI E BAILEY RD, Contra Costa, CA

Built 1976 Load: 35.0 t ADT: 7,500

GOLF CLUB ROAD

Over: GRAYSON CREEK

0.15 MI W- CONTRA COSTA, Contra Costa, CA

Built 2014 Load: 35.6 t ADT: 700

STATE ROUTE 4

Over: ABANDONED BNSF RY SPUR

04-CC-004-R8.85-MTZ, Contra Costa, CA

Built 1967 Load: 36.3 t ADT: 62,000

TAYLOR BLVD

Over: GRAYSON CREEK

0.2 MI W CONTRA COSTA BLV, Contra Costa, CA

Built 1961 Load: 36.6 t ADT: 14,800

TAYLOR BLVD

Over: CONTRA COSTA CANAL

0.8 MI W CONTRA COSTA BLV, Contra Costa, CA

Built 1961 Load: 38.2 t ADT: 12,300

SEVEN HILL RNCH RD

Over: WALNUT CREEK

AT CHERRY LANE, Contra Costa, CA

Built 1965 Load: 38.9 t ADT: 2,200

WILLOW PASS RD

Over: MT DIABLO CRK

0.8 MI S OF SH 4, Contra Costa, CA

Built 1944 Load: 39.9 t ADT: 7,200

PORT CHICAGO HWY

Over: MOUNT DIABLO CREEK

0.6 MI N HWY 4, Contra Costa, CA

Built 1979 Load: 40.2 t ADT: 3,240

LOVERIDGE ROAD

Over: CONTRA COSTA CANAL

0.2 MI N BUCHANAN RD, Contra Costa, CA

Built 1970 Load: 45.0 t ADT: 1,500

STATE ROUTE 4 WB

Over: USN RR & KINNE BLVD

04-CC-004-R16.00-CND, Contra Costa, CA

Built 1975 Load: 46.3 t ADT: 73,000

BISHOP LANE

Over: SAN RAMON CREEK

RUDGEAR ROAD, Contra Costa, CA

Built 1964 Load: 47.3 t ADT: 250

GARROW DRIVE

Over: CONTRA COSTA CANAL

0.1 MI S OF DAVISON DR, Contra Costa, CA

Built 1991 Load: 48.6 t ADT: 4,500

RUDGEAR RD

Over: SAN RAMON CREEK

DANVILLE BLVD, Contra Costa, CA

Built 1964 Load: 52.8 t ADT: 8,000

GENTRYTOWN DRIVE

Over: CONTRA COSTA CANAL

0.7 MI N JAMES DONLON, Contra Costa, CA

Built 1973 Load: 53.8 t ADT: 4,500

STATE ROUTE 4 EB

Over: USN RR & KINNE BLVD

04-CC-004-R16.00-CND, Contra Costa, CA

Built 1976 Load: 56.7 t ADT: 73,000

BERNARD ROAD

Over: MARSH CREEK

160 M NE MAIN ST/SR-4, Contra Costa, CA

Built 2003 Load: 59.0 t ADT: 4,200

IMHOFF DRIVE

Over: WALNUT CREEK

0.3 MI W SOLANO WAY, Contra Costa, CA

Built 1981 Load: 59.6 t ADT: 1,000

RAMONA ST

Over: PINOLE CREEK

0.1 MI E OF PINOLE VAL RD, Contra Costa, CA

Built 1971 Load: 60.9 t ADT: 1,500

LUCILLE LN

Over: GRAYSON CREEK

0.3 MI S TAYLOR BLVD, Contra Costa, CA

Built 1979 Load: 70.3 t ADT: 120

CLAYTON RD

Over: PINE CREEK

300 FT EAST OF MARKET ST, Contra Costa, CA

Built 1981 Load: 83.6 t ADT: 12,000

OAK GROVE RD

Over: PINE CREEK

0.5 MI N WALNUT AVE, Contra Costa, CA

Built 1974 Load: 92.7 t ADT: 6,600

INTERSTATE 80

Over: SAN PABLO CREEK

04-CC-080-4.81, Contra Costa, CA

Built 1954 Load: 99.9 t ADT: 179,000

INTERSTATE 80

Over: PINOLE CREEK

04-CC-080-8.40-PIN, Contra Costa, CA

Built 1957 Load: 99.9 t ADT: 179,000

INTERSTATE 80

Over: RODEO CREEK

04-CC-080-10.73, Contra Costa, CA

Built 1958 Load: 99.9 t ADT: 115,000

WATERFRONT RD

Over: SLOUGH

WEST OF T1/T2, Contra Costa, CA

LINDEMANN RD

Over: DELTA-MENDOTA CANAL

100 FT S HERDLYN RD, Contra Costa, CA

Built 1950 Load: 10.4 t ADT: 150

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