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)

WHISTLER AVE

Good

Over: N BR LAGUNA DE SANTA RSA

0.3 MI N WILFRED AVE, Sonoma, CA

Built 1963 Load: 37.3 t ADT: 200

BROOKWOOD AVE

Good

Over: MATANZAS CR (BROOKWOOD)

BETN CLARK ST-SONOMA AVE, Sonoma, CA

Built 1951 Load: 38.2 t ADT: 9,400

BOHEMIAN HWY

Good

Over: SALMON CREEK

0.2 MI W BODEGA HWY, Sonoma, CA

Built 1971 Load: 38.2 t ADT: 1,850

MILL CREEK RD

Good

Over: MILL CREEK

4.5 MI W OF WESTSIDE RD, Sonoma, CA

Built 1961 Load: 38.2 t ADT: 200

MAGNOLIA DR

Good

Over: WEST SLOUGH

NEAR SKIMMER RD, Sonoma, CA

Built 1979 Load: 39.2 t ADT: 100

WATSON RD

Good

Over: FIFE CREEK

0.15 MI W ARMSTRNG WDS RD, Sonoma, CA

Built 1970 Load: 39.5 t ADT: 100

ROCKPILE ROAD

Good

Over: BOAT LAUNCH UC

0.5 MI W STWT PT-SK SP RD, Sonoma, CA

Built 1985 Load: 39.9 t ADT: 2,400

MISSION BLVD

Good

Over: AUSTIN CREEK

0.5 M NORTH OF HWY 12, Sonoma, CA

Built 1960 Load: 40.2 t ADT: 11,000

LEVERONI RD

Good

Over: SONOMA CREEK

0.65 MI W JCT WITH SR 12, Sonoma, CA

Built 1969 Load: 40.8 t ADT: 10,400

CHALK HILL RD

Good

Over: FRANZ CREEK

3 MI SOUTH SR 128, Sonoma, CA

Built 1965 Load: 42.4 t ADT: 850

HOEN AVENUE

Good

Over: SPRING CREEK

0.3 M SOUTH OF SONOMA AVE, Sonoma, CA

Built 1955 Load: 43.4 t ADT: 2,000

GEYSERS RD

Good

Over: LITTLE SULPHUR CREEK

8.5 MI N OF SH 128, Sonoma, CA

Built 1983 Load: 45.4 t ADT: 500

ALDERBROOK DR

Good

Over: SANTA ROSA CREEK

NEAR 4TH STREET, Sonoma, CA

Built 1979 Load: 45.7 t ADT: 1,000

MAIN STREET

Good

Over: DUTCH BILL CREEK

MAIN STREET AT TYRONE, Sonoma, CA

Built 1975 Load: 47.6 t ADT: 1,600

STATE ROUTE 116

Good

Over: ELLIS CREEK

04-SON-116-37.49, Sonoma, CA

Built 1972 Load: 48.0 t ADT: 12,000

STATE ROUTE 116

Good

Over: RUSSIAN RIVER

04-SON-116-R5.73, Sonoma, CA

Built 1976 Load: 48.6 t ADT: 5,175

WILLOW CREEK RD

Good

Over: WILLOW CREEK

1.5 MI E SH 1, Sonoma, CA

Built 1978 Load: 49.6 t ADT: 170

CORONA RD

Good

Over: PETALUMA RIVER

N OF PETALUMA BLVD, Sonoma, CA

Built 1977 Load: 49.9 t ADT: 4,800

WATERTROUGH RD

Good

Over: ATASCADERO CREEK

0.55 MI N SANDERS RD, Sonoma, CA

Built 1975 Load: 50.2 t ADT: 2,100

E STREET

Good

Over: SANTA ROSA CREEK

BETWN SONOMA AVE & SEC ST, Sonoma, CA

Built 1920 Load: 51.8 t ADT: 11,900

CAZADERO HWY

Good

Over: KIDD CREEK

N OF INTERSECT SR 26, Sonoma, CA

Built 1974 Load: 52.5 t ADT: 1,450

STATE ROUTE 128

Good

Over: FOOTE CREEK

04-SON-128-20.72, Sonoma, CA

Built 1982 Load: 53.8 t ADT: 2,125

RIVER RD

Good

Over: HILLSIDE

0.3 MI E/O CANYON 7 RD., Sonoma, CA

Built 1971 Load: 55.1 t ADT: 10,300

MARK W SPRING RD

Good

Over: MARK WEST CREEK

15.5 MI N/E INTX RDWD HY, Sonoma, CA

Built 1976 Load: 76.5 t ADT: 2,000

STWRT PT-SKGG SPRG

Good

Over: WOLF CREEK CULVERT WEST

1.7 MI E/O HOUSE CREEK, Sonoma, CA

Built 1978 Load: 99.9 t ADT: 300

STWRT PT-SKGG SPRG

Good

Over: WOLF CREEK CULVERT EAST

2.3 MI E/O HOUSE CREEK, Sonoma, CA

Built 1978 Load: 99.9 t ADT: 300

SWEETWTR SPRNGS RD

Poor

Over: PORTER CREEK

3.5 MI W OF WESTSIDE RD, Sonoma, CA

Built 1968 ADT: 140

BLOOMFIELD RD

Poor

Over: BLOOMFIELD CREEK

0.18 MI N VALLEY FORD RD, Sonoma, CA

Built 1917 Load: 13.0 t ADT: 524

OLD DUNCANS GRD RD

Poor

Over: AUSTIN CREEK

BTN CZDERO HY&AUSTN CR RD, Sonoma, CA

Built 1924 Load: 14.3 t ADT: 30

GEYSERS ROAD

Poor

Over: CAMACHO CREEK

24 MI N OF SR 128, Sonoma, CA

Built 1974 Load: 16.2 t ADT: 60

STATE ROUTE 116

Poor

Over: GREEN VALLEY CREEK

04-SON-116-18.66, Sonoma, CA

Built 1930 Load: 16.8 t ADT: 12,400

WOHLER RD

Poor

Over: MARK WEST CREEK

NEAR RIVER RD, Sonoma, CA

Built 1922 Load: 16.8 t ADT: 500

FRANZ VALEY SCH RD

Poor

Over: FRANZ CREEK

JUST N/O FRANZ RD, Sonoma, CA

Built 1946 Load: 18.8 t ADT: 350

LLANO RD

Poor

Over: COLGAN CREEK

1.1 MI N OF SH 116, Sonoma, CA

Built 1979 Load: 19.8 t ADT: 1,750

RIVER RD

Poor

Over: MARK WEST CREEK

11.2 MI W OF SR 116, Sonoma, CA

Built 1958 Load: 21.4 t ADT: 8,000

SARTORI DR

Poor

Over: ADOBE CREEK

0.2 MI SE CASA GRANDE AVE, Sonoma, CA

Built 1976 Load: 21.7 t ADT: 1,475

WATMAUGH ROAD

Poor

Over: FOWLER CREEK

0.3 MI E ARNOLD, Sonoma, CA

Built 1920 Load: 22.4 t ADT: 3,300

SNYDER LN

Poor

Over: CRANE CRK (SNYDER)

0.7 MI N ROHNERT PARK EXP, Sonoma, CA

Built 1965 Load: 24.3 t ADT: 1,500

SEAVEY RD

Poor

Over: NO NAME CREEK

0.4 MI W SPRING HILL RD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 200

SANTA ROSA AVENUE

Poor

Over: COLGAN CREEK

SOUTH OF COLGAN AVENUE, Sonoma, CA

Built 1963 Load: 24.3 t ADT: 29,487

RAILROAD AVENUE

Poor

Over: NO NAME CREEK

AT VAN NESS, Sonoma, CA

Built 1970 Load: 26.9 t ADT: 100

STATE ROUTE 116

Poor

Over: DRAKE ROAD

04-SON-116-R12.42, Sonoma, CA

Built 1999 Load: 27.2 t ADT: 8,450

FIR ROAD

Poor

Over: DUTCH BILL CREEK

MONTE RIO, Sonoma, CA

Built 1974 Load: 27.9 t ADT: 300

RIVER RD

Poor

Over: RUSSIAN RIVER

5.31 MI INTX WITH SR 116, Sonoma, CA

Built 1914 Load: 28.2 t ADT: 10,000

WINDSOR ROAD

Poor

Over: POOL CREEK

0.2 MI N OF SHILOH RD, Sonoma, CA

Built 1967 Load: 28.8 t ADT: 5,900

WASHINGTON ST

Poor

Over: PETALUMA RIVER

NEAR DOWNTOWN PETALUMA, Sonoma, CA

Built 1970 Load: 31.1 t ADT: 21,900

EAGLE NEST LANE

Poor

Over: HILLSIDE

0.2 MI N RIVER RD, Sonoma, CA

Built 1930 Load: 31.8 t ADT: 100

SR 12

Poor

Over: CALABAZAS CREEK

04-SON-012-29.41, Sonoma, CA

Built 1989 Load: 32.4 t ADT: 15,300

STATE ROUTE 128

Poor

Over: RUSSIAN RIVER

04-SON-128-5.44, Sonoma, CA

Built 2006 Load: 32.4 t ADT: 2,650

STATE ROUTE 128

Poor

Over: MAACAMA CREEK

04-SON-128-17.25, Sonoma, CA

Built 2011 Load: 32.4 t ADT: 2,900

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
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.