Sonoma County, CA

613 public highway bridges

Sonoma County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Sonoma County, California contains 613 public highway bridges. Roughly 22.2% are rated “Good,” 60.8% “Fair,” and 6% “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.

613

Total Bridges

22.2%

Good

60.8%

Fair

6%

Poor Condition

Condition Distribution

Good

22.2% (136)

Fair

60.8% (373)

Poor

6% (37)

All Bridges (613)

Sort:

CROCKER RD

Over: RUSSIAN RIVER

0.6 MI N/E OF S.R. 101, Sonoma, CA

Built 1938 Load: 17.2 t ADT: 3,200

VALLEY FORD RD

Over: GOSSAGE CREEK

6.6 MI INTERSECTION SR 1, Sonoma, CA

Built 1926 Load: 17.2 t ADT: 3,100

CALISTOGA RD

Over: HUMBUG CREEK

4.9 MI N/O SR 12, Sonoma, CA

Built 1935 Load: 17.2 t ADT: 5,800

BODEGA HIGHWAY

Over: ATASCADERO CREEK

9.3 MI E/O SR 1, Sonoma, CA

Built 1923 Load: 17.2 t ADT: 10,304

ANNAPOLIS RD

Over: GUALALA RIV (CLARK XING)

INTRX STWRT PT-SKGSSP RD, Sonoma, CA

Built 1920 Load: 17.2 t ADT: 800

BOHEMIAN HWY

Over: DUTCH BILL CREEK

5.4 MI FROM SR 116, Sonoma, CA

Built 1935 Load: 17.2 t ADT: 2,100

SAN LUIS ROAD

Over: SCHELL CREEK

JUST EAST OF SR 12, Sonoma, CA

Built 1970 Load: 17.2 t ADT: 100

DUNBAR RD

Over: CALABAZAS CREEK

0.1 MI N SYLVIA DRIVE, Sonoma, CA

Built 1915 Load: 17.2 t ADT: 800

KING RIDGE RD

Over: WARD CREEK

0.2 MI N FORT ROSS RD, Sonoma, CA

Built 1973 Load: 17.2 t ADT: 200

CHALK HILL RD

Over: MAACAMA CREEK

1 MI S OF SR 128, Sonoma, CA

Built 1915 Load: 17.5 t ADT: 800

FOURTH ST

Over: FIFE CREEK

NEAR BROOKSIDE LN, Sonoma, CA

Built 1926 Load: 17.8 t ADT: 1,800

STONY POINT RD

Over: SANTA ROSA CREEK

.5 MI S/O W COLLEGE AVE, Sonoma, CA

Built 1971 Load: 18.1 t ADT: 22,000

LAMBERT BRIDGE RD

Over: DRY CREEK

0.4 MI W OF DRY CREEK RD, Sonoma, CA

Built 1915 Load: 18.1 t ADT: 838

LICHAU RD

Over: COPELAND CREEK

1.0 MI E PRESSLEY ROAD, Sonoma, CA

Built 1968 Load: 18.1 t ADT: 1,500

WESTSIDE ROAD

Over: DRY CREEK

0.5 MI WEST OF US 101, Sonoma, CA

Built 1934 Load: 18.8 t ADT: 6,100

W THIRD ST

Over: SANTA ROSA CREEK

BTWN RBTS & WLSN, Sonoma, CA

Built 1935 Load: 18.8 t ADT: 14,600

LESLIE RD

Over: PORTER CREEK

.7M NW MARK WEST SPRGS RD, Sonoma, CA

Built 1972 Load: 18.8 t ADT: 63

FRANZ VALLEY ROAD

Over: FRANZ CREEK

2 MILES SW OF SR 128, Sonoma, CA

Built 1977 Load: 18.8 t ADT: 500

CORBY AVE

Over: COLGAN CREEK

0.1 MILE SOUTH OF HEARN, Sonoma, CA

Built 1930 Load: 19.1 t ADT: 3,000

ADOBE RD

Over: LYNCH CREEK

3.2 MI S PETALUMA HILL RD, Sonoma, CA

Built 1950 Load: 19.1 t ADT: 11,600

FREEZEOUT ROAD

Over: FREEZEOUT CREEK

0.3 MI S MOSCOW RD, Sonoma, CA

Built 1971 Load: 19.4 t ADT: 200

WEST DRY CREEK RD

Over: PENA CREEK

0.7 MI NW YOAKIM BR RD, Sonoma, CA

Built 1924 Load: 19.4 t ADT: 300

GRANT ST

Over: FOSS CREEK

IN HEALDSBURG, Sonoma, CA

Built 1920 Load: 19.8 t ADT: 1,830

WESTSIDE ROAD

Over: MILL CREEK

0.2 MI N FOREMAN LANE, Sonoma, CA

Built 1961 Load: 20.1 t ADT: 3,200

WARM SPRINGS RD

Over: SONOMA CREEK

2.8 MI S OF SR 12, Sonoma, CA

Built 1931 Load: 20.1 t ADT: 800

U.S. HIGHWAY 101

Over: SIERRA AVE

04-SON-101-12.00-COTI, Sonoma, CA

Built 1956 Load: 20.4 t ADT: 86,000

PETALUMA HILL RD

Over: COPELAND CREEK

5.2 MI INTER STONY PNT RD, Sonoma, CA

Built 1969 Load: 20.4 t ADT: 16,000

FREESTONE FLAT RD

Over: SALMON CREEK

0.2 MI E BOHEMIAN HWY, Sonoma, CA

Built 1955 Load: 20.4 t ADT: 121

US HIGHWAY 101 NB

Over: NWP RR/NCRRA

04-SON-101-33.22, Sonoma, CA

Built 1962 Load: 21.1 t ADT: 22,750

BOHEMIAN HWY

Over: RUSSIAN RIVER

AT MONTE RIO, Sonoma, CA

Built 1934 Load: 21.1 t ADT: 3,100

OLD REDWOOD HWY

Over: PRUITT CREEK

1.75 MI S PLEASANT RD, Sonoma, CA

Built 1913 Load: 21.1 t ADT: 9,000

AUSTIN CR RD

Over: AUSTIN CREEK

JUST S CAZADERO HWY, Sonoma, CA

Built 1959 Load: 21.4 t ADT: 200

BODEGA HWY

Over: SALMON CREEK

AT VALLEY FORD-FREESTN RD, Sonoma, CA

Built 1968 Load: 21.4 t ADT: 6,400

BENNETT VALLEY RD

Over: YULUPA CREEK

0.6 MI W WARM SPRINGS RD, Sonoma, CA

Built 1970 Load: 21.7 t ADT: 2,500

AUSTIN CREEK RD

Over: NO NAME CREEK

AT BERKLEY CAMP, Sonoma, CA

Built 1964 Load: 21.7 t ADT: 200

OLD REDWOOD HWY

Over: POOL CREEK

0.5 MI S/O PLEASANT RD, Sonoma, CA

Built 1925 Load: 22.0 t ADT: 13,800

TACHEVAH DR

Over: DRAINAGE CANAL

0.1 M WEST NEUTOMAS AVE, Sonoma, CA

Built 1968 Load: 22.0 t ADT: 3,000

RAINSVILLE RD

Over: WIGGINS CREEK

0.8 MI W STONY POINT RD, Sonoma, CA

Built 1986 Load: 22.0 t ADT: 3,200

CHALK HILL RD

Over: BROOKS CREEK

4.5 MI S OF SR 128, Sonoma, CA

Built 1956 Load: 22.0 t ADT: 850

SWEETWTR SPRNGS RD

Over: PORTER CREEK

6.6 MI W ARMSTRONG RD, Sonoma, CA

Built 1968 Load: 22.0 t ADT: 140

FITCH MOUNTAIN RD

Over: HILLSIDE

1.6 MI E JCT HEALDSBG AVE, Sonoma, CA

Built 1970 Load: 22.0 t ADT: 525

MACARTHUR STREET

Over: NATHANSON CREEK

AUSTIN AVE, Sonoma, CA

Built 1965 Load: 22.4 t ADT: 2,000

US HIGHWAY 101 SB

Over: NWP RR/NCRRA

04-SON-101-33.22, Sonoma, CA

Built 1962 Load: 22.7 t ADT: 22,750

STEELE LANE

Over: PAULINE CREEK

STEELE LANE, Sonoma, CA

Built 1960 Load: 22.7 t ADT: 6,000

FITZPATRICK LANE

Over: FAY CREEK

0.9 MI N SALMON CREEK RD, Sonoma, CA

Built 1973 Load: 23.0 t ADT: 300

OLD MONTE RIO RD

Over: HILLSIDE

0.1 MI NE SANTA ROSA AVE, Sonoma, CA

Built 1980 Load: 23.0 t ADT: 100

US HIGHWAY 101 SB

Over: CITRUS FAIR DRIVE

04-SON-101-R51.62-CLVD, Sonoma, CA

Built 1994 Load: 23.7 t ADT: 6,800

JAMISON RD

Over: MATANZAS CREEK

0.4 MI E SONOMA MTN RD, Sonoma, CA

Built 1969 Load: 23.7 t ADT: 150

WINDSOR RD

Over: BRANCH WINDSOR CREEK

0.3 MI N OF SILK RD, Sonoma, CA

Built 1946 Load: 23.7 t ADT: 1,500

KINLEY DR

Over: WEST SLOUGH

600' SW OF RTE 101, Sonoma, CA

Built 1959 Load: 24.0 t ADT: 200

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

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Compiled by PlainBridges, Independent data publisher

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.