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)

US HIGHWAY 101

Unknown

Over: COLLEGE AVENUE

04-SON-101-20.74-SRO, Sonoma, CA

Built 2009 ADT: 34,300

US HIGHWAY 101 SB

Unknown

Over: SR 116 & NWP RR & DITCH

04-SON-101-3.65-PET, Sonoma, CA

Built 2007 ADT: 31,750

US HIGHWAY 101 NB

Unknown

Over: SR 116, RR TRACKS, DITCH

04-SON-101-3.60-PET, Sonoma, CA

Built 2015 ADT: 31,750

US HIGHWAY 101

Unknown

Over: WILFRED AV-GOLFCOURSE DR

04-SON-101-14.89-RNPK, Sonoma, CA

Built 2012 ADT: 33,160

SB101-GOLF CRS OFF

Unknown

Over: COMMERCE BLVD & NWPRR

04-SON-101-15.07-RNPK, Sonoma, CA

Built 2012 ADT: 11,000

US HIGHWAY 101

Unknown

Over: WEST RAILROAD AVENUE

04-SON-101-10.67, Sonoma, CA

Built 2011 ADT: 4,000

US HIGHWAY 101

Unknown

Over: SR 116 GRAVENSTEIN HWY

04-SON-101-12.70-COTI, Sonoma, CA

Built 2011 ADT: 22,500

OLD REDWOOD HWY N

Unknown

Over: US HIGHWAY 101

04-SON-101-7.65-PET, Sonoma, CA

Built 2014 ADT: 94,000

KASTANIA ROAD

Unknown

Over: US HIGHWAY 101

04-SON-101-2.60-PET, Sonoma, CA

Built 2014 ADT: 76,000

US HIGHWAY 101

Unknown

Over: PETALUMA RIVER

04-SON-101-3.23-PET, Sonoma, CA

Built 2016 ADT: 10,000

AIRPORT BLVD

Unknown

Over: US HIGHWAY 101

04-SON-101-26.30, Sonoma, CA

Built 2014 ADT: 62,000

US HIGHWAY 101

Unknown

Over: STEELE LANE

04-SON-101-21.74-SRO, Sonoma, CA

Built 2009 ADT: 150,000

NCRRA/NWP RR

Unknown

Over: OLD REDWOOD HWY

32.2 MI N MARIN LINE, Sonoma, CA

Built 1915 ADT: 5,900

GRAPE VINES

Unknown

Over: MARK WEST SPRINGS ROAD

4.9 MI NE INTX OLD RD HY, Sonoma, CA

Built 1975 ADT: 10,000

BICENTENNIAL WAY

Unknown

Over: FOUNTAINGROVE PARKWAY

0.5 MI E OF RTE 101, Sonoma, CA

Built 1985 ADT: 1,000

FOUNTAIN GROVE PKW

Unknown

Over: CHANATE ROAD

AT CHANATE ROAD, Sonoma, CA

Built 1997 ADT: 1,200

FOUNTAIN GROVE PKW

Unknown

Over: CHANATE ROAD

AT CHANATE ROAD, Sonoma, CA

Built 1997 ADT: 1,200

OLD CAZADERO RD

Fair

Over: AUSTIN CREEK

AT CAZADERO HWY, Sonoma, CA

Built 1940 Load: 10.0 t ADT: 60

ARNOLD DRIVE

Fair

Over: SONOMA CREEK

7.6 MI NORTH OF SR 116, Sonoma, CA

Built 1930 Load: 11.7 t ADT: 13,900

STATE ROUTE 116

Fair

Over: JONES CREEK

04-SON-116-19.90, Sonoma, CA

Built 1921 Load: 13.0 t ADT: 12,400

WATMAUGH ROAD

Fair

Over: SONOMA CREEK

0.3 MI WEST OF SR 12, Sonoma, CA

Built 1929 Load: 13.3 t ADT: 3,628

WOHLER RD

Fair

Over: RUSSIAN RIVER

1.5 MI FROM RIVER RD, Sonoma, CA

Built 1921 Load: 14.3 t ADT: 828

SR 12

Fair

Over: AGUA CALIENTE CREEK

04-SON-012-35.75, Sonoma, CA

Built 1924 Load: 14.6 t ADT: 18,600

VERANO AVE

Fair

Over: SONOMA CREEK

0.7 MI E ARNOLD DR, Sonoma, CA

Built 1949 Load: 14.6 t ADT: 9,700

CHASE ST

Fair

Over: NATHANSON CREEK

0.1 MI E SR 12 SONOMA, Sonoma, CA

Built 1910 Load: 14.6 t ADT: 600

SOUTH E ST

Fair

Over: MATANZAS CREEK

BETWN TUPPER & SONOMA AVE, Sonoma, CA

Built 1935 Load: 14.9 t ADT: 11,100

4TH ST EAST

Fair

Over: NATHANSON CREEK

0.1 MI N OF E NAPA ST, Sonoma, CA

Built 1914 Load: 15.2 t ADT: 2,100

ALEXANDER VALLEY R

Fair

Over: RUSSIAN RIVER - JIMTOWN

NORTH OF HEALDSBURG, Sonoma, CA

Built 1949 Load: 15.6 t ADT: 3,300

WATMAUGH ROAD

Fair

Over: NATHANSON CREEK

0.5 MI E SR 12, Sonoma, CA

Built 1920 Load: 15.6 t ADT: 1,000

NEELEY ROAD

Fair

Over: HILLSIDE

1.1 MI W S.H. 116, Sonoma, CA

Built 1930 Load: 15.6 t ADT: 3,000

FRANCE ST

Fair

Over: NATHANSON CREEK

0.1 MI E SR 12 SONOMA, Sonoma, CA

Built 1918 Load: 15.6 t ADT: 750

PETALUMA BLVD N

Fair

Over: PETALUMA RIVER

0.2 MI S JCT US 101, Sonoma, CA

Built 1940 Load: 15.9 t ADT: 4,200

SALMON CREEK RD

Fair

Over: TANNERY CREEK

0.12 MI W TANNERY CRK RD, Sonoma, CA

Built 1920 Load: 15.9 t ADT: 100

2ND STREET

Fair

Over: NATHANSON CREEK

.02 MI SO. OF E. NAPA ST, Sonoma, CA

Built 1909 Load: 15.9 t ADT: 820

VALLEY FORD RD

Fair

Over: STEMPLE CREEK

7.5 MI INTERSECTION SR 1, Sonoma, CA

Built 1915 Load: 16.2 t ADT: 3,100

BODEGA HWY

Fair

Over: NOLAN CREEK

1.2 MI NE INTX SR 1, Sonoma, CA

Built 1955 Load: 16.2 t ADT: 6,400

DRY CRK CANYON RD

Fair

Over: LYTTON SPRINGS CREEK

INTERSECTION LYTTON RD, Sonoma, CA

Built 1935 Load: 16.2 t ADT: 2,800

W COLLEGE AVE

Fair

Over: COLLEGE CREEK

0.05 MI W MARLOW RD, Sonoma, CA

Built 1935 Load: 16.2 t ADT: 26,000

WARM SPRINGS RD

Fair

Over: YULUPA CREEK

11.15 MI N OF S.H. 116, Sonoma, CA

Built 1930 Load: 16.2 t ADT: 2,700

OAK ST

Fair

Over: DOWDALL CREEK

0.1 MI W/O RIVERSIDE DR, Sonoma, CA

Built 1940 Load: 16.2 t ADT: 350

O'DONNELL LANE

Fair

Over: CALABAZAS CREEK

NEAR ARNOLD DRIVE, Sonoma, CA

Built 1900 Load: 16.2 t ADT: 500

FAUGHT ROAD

Fair

Over: PRUITT CREEK

0.3 MI N OF E SHILOH RD, Sonoma, CA

Built 1935 Load: 16.2 t ADT: 2,900

ARNOLD DR

Fair

Over: STEWART CREEK

0.4 MI S JCT SR 12, Sonoma, CA

Built 1928 Load: 16.2 t ADT: 3,700

GEYSERS RD

Fair

Over: FRASIER CREEK

20.4 MI N OF SR 128, Sonoma, CA

Built 1941 Load: 16.5 t ADT: 250

LAUGHLIN RD

Fair

Over: MARK WEST CREEK

1 MI N OF RIVER RD, Sonoma, CA

Built 1910 Load: 16.5 t ADT: 2,338

OLD REDWOOD HWY

Fair

Over: SOTOYOME CREEK

0.7 MI SE EASTSIDE RD, Sonoma, CA

Built 1913 Load: 16.8 t ADT: 5,900

STWRT PT-SKGG SPRG

Fair

Over: SHINGLE MILL CR (OHLSON)

14.3 MI SR 1 VIA ANPLS RD, Sonoma, CA

Built 1935 Load: 16.8 t ADT: 300

WARM SPRINGS RD

Fair

Over: CALABAZAS CREEK

NEAR ARNOLD DR, Sonoma, CA

Built 1928 Load: 16.8 t ADT: 3,000

FULTON RD

Fair

Over: MARK WEST CREEK

0.2 MI N OF US HWY 101, Sonoma, CA

Built 1971 Load: 16.8 t ADT: 14,650

CANYON RD

Fair

Over: CANYON CREEK

0.4 MI E JCT DRY CREEK RD, Sonoma, CA

Built 1928 Load: 16.8 t ADT: 416

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.