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)

MOSCOW ROAD

Fair

Over: HILLSIDE

1.85 MI NE OF SR 116, Sonoma, CA

Built 1960 Load: 24.0 t ADT: 700

BOHAN DILLON RD

Fair

Over: SOUTH FORK GUALALA RIVER

0.1 MI N FORT ROSS RD, Sonoma, CA

Built 1950 Load: 24.0 t ADT: 50

STATE ROUTE 121

Fair

Over: YELLOW CREEK

04-SON-121-6.52, Sonoma, CA

Built 1922 Load: 24.3 t ADT: 16,150

EB STATE ROUTE 12

Fair

Over: SANTA ROSA AVE

04-SON-012-R16.26-SRO, Sonoma, CA

Built 1964 Load: 24.3 t ADT: 36,500

REDWOOD

Fair

Over: LAGUNA DE SANTA ROSA

JUST W/O US 101, Sonoma, CA

Built 1956 Load: 24.3 t ADT: 2,050

REDWOOD DR

Fair

Over: COPELAND CREEK

0.42 MI S ROHNERT PK EXPY, Sonoma, CA

Built 1956 Load: 24.3 t ADT: 3,000

PORTER CREEK ROAD

Fair

Over: PORTER CREEK

24.3 MI BEGING RTE 786, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 5,800

CALISTOGA RD

Fair

Over: WEEKS CREEK

AT ST. HELENA RD, Sonoma, CA

Built 1953 Load: 24.3 t ADT: 6,000

DRY CRK CANYON RD

Fair

Over: DUTCHER CREEK

INTRX DUTCHER CREEK RD, Sonoma, CA

Built 1968 Load: 24.3 t ADT: 2,800

DRY CREEK RD

Fair

Over: CANYON CREEK

INTERSECTION CANYON RD, Sonoma, CA

Built 1963 Load: 24.3 t ADT: 2,800

MIDDLE RINCON RD

Fair

Over: AUSTIN CREEK

0.25 MI N OF SH 12, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 2,200

CLEVELAND AVE

Fair

Over: PAULINE CREEK

0.3 MI N GUERNEVILLE RD, Sonoma, CA

Built 1963 Load: 24.3 t ADT: 13,000

CALISTOGA ROAD

Fair

Over: AUSTIN CREEK

N INTRX WITH S.R. 12, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 17,770

PINER ROAD

Fair

Over: PINER CREEK

IN SANTA ROSA, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 5,900

COFFEY LANE

Fair

Over: PINER CREEK

0.1 MILES S/O PINER ROAD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 3,100

MARLOW ROAD

Fair

Over: PINER CREEK

MARLOW ROAD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 2,300

MARLOW RD

Fair

Over: PAULINE CREEK

MARLOW RD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 12,500

SNYDER LN

Fair

Over: BRANCH OF FIVE CREEK

1.1 MI N ROHNERT PARK EXP, Sonoma, CA

Built 1965 Load: 24.3 t ADT: 1,500

SNYDER LANE

Fair

Over: COPELAND CREEK

0.5 MI N E. COTATI AVE, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 3,124

COMMERCE BLVD

Fair

Over: HINEBAUGH CREEK

0.1 MI N RNPK EXPRESSWAY, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 500

E COTATI AVE

Fair

Over: FLOOD CONTROL DITCH

0.1 MI NE OLD REDWOOD HWY, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 3,000

GEYSERS RD

Fair

Over: GIRD CREEK

0.4 MI N OF SR 128, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 500

WATMAUGH ROAD

Fair

Over: RODGERS CREEK

0.3 MI W ARNOLD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 4,000

RAILROAD AVE

Fair

Over: DOWDALL CREEK

0.3 MI S/O VERANO, Sonoma, CA

Built 1961 Load: 24.3 t ADT: 524

ST HELENA ROAD

Fair

Over: VAN BUREN CREEK

1.2 MI W CALISTOGA RD, Sonoma, CA

Built 1952 Load: 24.3 t ADT: 2,100

GILMORE AVENUE

Fair

Over: GOSSAGE CREEK

0.1 MI N/O DERBY LANE, Sonoma, CA

Built 1972 Load: 24.3 t ADT: 100

SCENIC AVE

Fair

Over: NO NAME CREEK

0.1 MI W OF S MOORLAND AV, Sonoma, CA

Built 1950 Load: 24.3 t ADT: 615

MECHAM RD

Fair

Over: STEMPLE CREEK

S OF 9TH ST, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 3,300

PEPPER RD

Fair

Over: STEMPLE CREEK

4 MI W OF US 101, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 3,500

WALKER RD

Fair

Over: GOSSAGE CREEK

AT VALLEY FORD ROAD, Sonoma, CA

Built 1967 Load: 24.3 t ADT: 250

RAINSVILLE RD

Fair

Over: MARIN CREEK

0.5 MI W STONY POINT RD, Sonoma, CA

Built 1950 Load: 24.3 t ADT: 3,200

CASA GRANDE AVE

Fair

Over: ADOBE CREEK

0.4 MI N ELY RD, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 1,600

CASA GRANDE AVE

Fair

Over: ADOBE CREEK

0.25 MI S ADOBE RD, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 2,000

E RAILROAD AVE

Fair

Over: LICHAU CREEK

0.1 MI E PETALUMA HILL RD, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 750

SWEETWATER SPRG RD

Fair

Over: BRANCH REDWOOD CREEK

1.2 MI NE ARMSTRNG WOOD R, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 140

SWEETWTR SPRNGS RD

Fair

Over: PORTER CREEK

7.7 MI W ARMSTRONG RD, Sonoma, CA

Built 1968 Load: 24.3 t ADT: 140

ADOBE CANYON ROAD

Fair

Over: HILLSIDE

1.1 MI NW/O SR 12, Sonoma, CA

Built 1965 Load: 24.3 t ADT: 650

DUTCHER CREEK RD

Fair

Over: DUTCHER CREEK

0.1 MI N DRY CREEK RD, Sonoma, CA

Built 1957 Load: 24.3 t ADT: 900

SKAGGS SPRINGS RD

Fair

Over: WARM SPRINGS CREEK

10.9 MI W JCT RCKPLE RD, Sonoma, CA

Built 1978 Load: 24.3 t ADT: 400

LLANO ROAD

Fair

Over: ROSELAND CR FLD CNTL CHN

2.4 MI N JCT WITH SR 116, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 3,000

GROVE RD

Fair

Over: CARRIGER CREEK

1.7 MI W JCT ARNOLD RD, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 1,850

HYDE ROAD

Fair

Over: ARROYO SECO

0.4 MI S JCT NAPA RD, Sonoma, CA

Built 1965 Load: 24.3 t ADT: 400

REDWOOD ROAD

Fair

Over: HINEBAUGH CREEK

0.3 MI N ROHNERT PK EXPWY, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 4,000

BETHARDS DRIVE

Fair

Over: MATANZAS CREEK

BET TECHEVAH & YULUPA AV, Sonoma, CA

Built 1966 Load: 24.3 t ADT: 6,000

APACHE STREET

Fair

Over: PAULIN CREEK

0.1 MI N OF STEELE LANE, Sonoma, CA

Built 1964 Load: 24.3 t ADT: 2,000

CHANATE ROAD

Fair

Over: PAULIN CREEK

NEAR MENDOCINO AVENUE, Sonoma, CA

Built 1965 Load: 24.3 t ADT: 17,942

MADISON STREET

Fair

Over: WASHINGTON CREEK

NORTH OF HOLLY LANE, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 300

HARNEY DRIVE

Fair

Over: SONOMA CREEK

SONOMA STATE INSTITUTION, Sonoma, CA

Built 1935 Load: 24.3 t ADT: 250

GUERNEVILLE RD

Fair

Over: LAGUNA DE SANTA ROSA

1.8 MI E/O SR 116, Sonoma, CA

Built 1957 Load: 24.6 t ADT: 8,400

NEELEY ROAD

Fair

Over: HILLSIDE

1 MI W SR 116, Sonoma, CA

Built 2006 Load: 24.6 t ADT: 3,000

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.