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)

STARRETT HILL DR

Good

Over: HILLSIDE

0.8 MI SE JCT MOSCOW RD, Sonoma, CA

Built 2015 Load: 29.8 t ADT: 200

ROCKPILE ROAD

Good

Over: WARM SPRINGS CREEK

3.5 MI JCT DUTCHER CRK RD, Sonoma, CA

Built 1978 Load: 30.1 t ADT: 1,650

US HIGHWAY 101 SB

Good

Over: LYNCH CREEK

04-SON-101-5.19-PET, Sonoma, CA

Built 1955 Load: 30.8 t ADT: 43,000

N DUTTON AVE

Good

Over: SANTA ROSA CREEK

DUTTON AVE, Sonoma, CA

Built 1973 Load: 31.1 t ADT: 22,000

SWTWATER SPRING RD

Good

Over: PORTER CREEK

4 MI W/O WESTSIDE RD, Sonoma, CA

Built 2005 Load: 31.4 t ADT: 140

MAYS CANYON RD

Good

Over: POCKET CANYON CREEK

JUST W OF S.R. 116, Sonoma, CA

Built 1968 Load: 31.8 t ADT: 95

U.S. HIGHWAY 101

Good

Over: LAGUNA DE SANTA ROSA

04-SON-101-13.09-RNPK, Sonoma, CA

Built 1956 Load: 32.4 t ADT: 92,000

STATE ROUTE 121

Good

Over: TOLAY CREEK

04-SON-121-1.53, Sonoma, CA

Built 1996 Load: 32.4 t ADT: 16,150

US HIGHWAY 101 NB

Good

Over: WILLOW BROOK

04-SON-101-8.05-PET, Sonoma, CA

Built 1956 Load: 32.4 t ADT: 94,000

US HWY 101 ON-RAMP

Good

Over: WASHINGTON CREEK

04-SON-101-4.78-PET, Sonoma, CA

Built 2013 Load: 32.4 t ADT: 20,000

US HIGHWAY 101

Good

Over: CORONA DITCH

04-SON-101-6.85-PET, Sonoma, CA

Built 1954 Load: 32.4 t ADT: 94,000

STATE ROUTE 1

Good

Over: POCOLIMI CREEK

04-SON-001-0.33, Sonoma, CA

Built 1960 Load: 32.4 t ADT: 4,200

STATE ROUTE 116

Good

Over: RUSSIAN RIVER

04-SON-116-R12.19, Sonoma, CA

Built 1998 Load: 32.4 t ADT: 8,450

SR 12

Good

Over: PURPLE DRAW

04-SON-012-9.84, Sonoma, CA

Built 1995 Load: 32.4 t ADT: 23,050

STATE ROUTE 12

Good

Over: TYLER'S DRAINAGE

04-SON-012-23.00, Sonoma, CA

Built 1950 Load: 32.4 t ADT: 21,000

STATE ROUTE 128

Good

Over: REDWOOD CREEK

04-SON-128-21.78, Sonoma, CA

Built 2011 Load: 32.4 t ADT: 2,900

OFFRAMP NB RTE 101

Good

Over: MARK WEST CREEK

04-SON-101-26.12, Sonoma, CA

Built 2014 Load: 32.4 t ADT: 10,000

U.S. ROUTE 101 NB

Good

Over: SMART RAILROAD TRACKS

04-SON-101-5.74-PET, Sonoma, CA

Built 2022 Load: 32.4 t ADT: 51,500

STATE ROUTE 116

Good

Over: LAGUNA DE SANTA ROSA TRB

04-SON-116-31.15, Sonoma, CA

Built 2020 Load: 32.4 t ADT: 18,000

STATE ROUTE 1

Good

Over: SCOTTY CREEK

04-SON-001-15.21, Sonoma, CA

Built 2023 Load: 32.4 t ADT: 5,200

STATE ROUTE 12

Good

Over: SONOMA CREEK

04-SON-012-25.82, Sonoma, CA

Built 2023 Load: 32.4 t ADT: 26,400

STATE ROUTE 12

Good

Over: HOOKER CREEK

04-SON-012-33.31, Sonoma, CA

Built 2023 Load: 32.4 t ADT: 13,900

HAHMAN DR

Good

Over: SPRING CREEK

0.1 M SOUTH SPRING CREEK, Sonoma, CA

Built 1960 Load: 32.4 t ADT: 6,000

STWRT PT-SKGG SPRG

Good

Over: SOUTH FORK GUALALA RIVER

2.5 MI E OF SH 1, Sonoma, CA

Built 1984 Load: 32.4 t ADT: 300

KING RIDGE RD

Good

Over: AUSTIN CREEK

0.5 MI N FORT ROSS RD, Sonoma, CA

Built 1958 Load: 32.4 t ADT: 200

OAKMONT DRIVE

Good

Over: GOLF CREEK

OAKMONT AREA OF SANTA RSA, Sonoma, CA

Built 1981 Load: 32.4 t ADT: 500

OLD REDWOOD HWY

Good

Over: EAST WINDSOR CREEK

0.1 MI S.E. OF SH101, Sonoma, CA

Built 1991 Load: 32.4 t ADT: 20,000

YULUPA AVENUE

Good

Over: SANTA ROSA CREEK

0.1 MI N MONTGOMERY DR., Sonoma, CA

Built 1996 Load: 32.4 t ADT: 1,200

MOUNTAIN HAWK WAY

Good

Over: SKY HAWK CREEK

0.2 MI N/O SR 12, Sonoma, CA

Built 1995 Load: 32.4 t ADT: 3,320

WILD LILAC LANE

Good

Over: RINCON CREEK

NEAR BRUSH CREEK ROAD, Sonoma, CA

Built 2000 Load: 32.4 t ADT: 2,800

GRANGE ROAD

Good

Over: MATANZAS CREEK

.1MI S BENNETT VALLEY RD, Sonoma, CA

Built 2005 Load: 32.4 t ADT: 3,250

WINDSOR ROAD

Good

Over: WINDSOR CREEK

AT VINTAGE GREENS ROAD, Sonoma, CA

Built 2005 Load: 32.4 t ADT: 5,000

CONDE LANE

Good

Over: PRUITT CREEK

0.1 MI N OF SHILOH ROAD, Sonoma, CA

Built 2008 Load: 32.4 t ADT: 3,000

CROSS CREEK ROAD

Good

Over: MARK WEST CREEK,S BRANCH

BY RIEBLI ROAD, Sonoma, CA

Built 1991 Load: 32.4 t ADT: 2,000

MOUNTAIN HAWK WAY

Good

Over: SKY HAWK CREEK

E OF SAN RAMON WAY, Sonoma, CA

Built 1995 Load: 32.4 t ADT: 3,320

STONE BRIDGE ROAD

Good

Over: MEADOW CREEK

0.6 MI W OF OAKMONT DR, Sonoma, CA

Built 1978 Load: 32.4 t ADT: 2,000

WILD OAK DRIVE

Good

Over: OAKMONT CREEK

SW OF OAKMONT DRIVE, Sonoma, CA

Built 1963 Load: 32.4 t ADT: 2,000

BURGESS DRIVE

Good

Over: COLGAN CREEK FLOOD C CHN

NORTH OF BELLEVUE AVENUE, Sonoma, CA

Built 1994 Load: 32.4 t ADT: 500

VALDES COURT

Good

Over: PINER CREEK

NW OF VALDES DRIVE, Sonoma, CA

Built 1976 Load: 32.4 t ADT: 200

MONTECITO BLVD

Good

Over: DUCKER CREEK

S OF BAIRD BLVD, Sonoma, CA

Built 1983 Load: 32.4 t ADT: 1,000

WILLOW CREEK ROAD

Good

Over: WILLOW CREEK

1.45 MI E/O SR 1, Sonoma, CA

Built 2011 Load: 32.4 t ADT: 170

HAUSER BR RD

Good

Over: SOUTH FORK GUALALA RIVER

5 MI. EAST OF SEAVIEW RD., Sonoma, CA

Built 2017 Load: 32.4 t ADT: 100

BOYES BLVD

Good

Over: SONOMA CREEK

JUST EAST OF RIVERSIDE DR, Sonoma, CA

Built 2022 Load: 32.4 t ADT: 4,600

FULTON ROAD

Good

Over: SANTA ROSA CREEK

1/4 MI S COLLEGE AVE, Sonoma, CA

Built 1960 Load: 32.6 t ADT: 19,000

STONY POINT RD

Good

Over: WILLOW BROOK CREEK

0.5 MI N INTX PETLMA BL, Sonoma, CA

Built 1961 Load: 33.0 t ADT: 10,855

STATE ROUTE 12

Good

Over: BRIGHAM AVE

04-SON-012-R17.10-SRO, Sonoma, CA

Built 1969 Load: 34.7 t ADT: 30,000

DUTTON MEADOW

Good

Over: COLGAN CR FLD CNTRL CHNL

NEAR BELLEVUE AVE., Sonoma, CA

Built 1964 Load: 34.7 t ADT: 300

STATE ROUTE 116

Good

Over: AUSTIN CREEK

04-SON-116-4.93, Sonoma, CA

Built 1962 Load: 35.6 t ADT: 5,175

WILLOW CREEK ROAD

Good

Over: WILLOW CREEK

0.5 MI E/O SR 1, Sonoma, CA

Built 1966 Load: 36.6 t ADT: 170

MILLBRAE AVE

Good

Over: N BR LAGUNA DE SANTA RSA

W OF LANGNER, Sonoma, CA

Built 1963 Load: 36.9 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.