Sonoma County, CA

613 public highway bridges

Sonoma County Bridge Snapshot

Sonoma County, California contains 613 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.2% are rated “Good,” 60.8% “Fair,” 6% “Poor,” and 6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

613
Total Bridges
22.2%
Good
6%
Poor
6%
Structurally Deficient

Condition Distribution

Good
22.2% (136)
Fair
60.8% (373)
Poor
6% (37)
SD
6% (37)

All Bridges (613)

W DRY CREEK ROAD

Good

Over: PINE RIDGE CANYON

1.35 MI NW WESTSIDE RD, Sonoma, CA

Built 1928 Load: 16.8 t ADT: 750

BODEGA HIGHWAY

Good

Over: JONIVE CREEK 1

7.3 MI FROM INT W/ SR 1, Sonoma, CA

Built 1922 Load: 17.2 t ADT: 7,000

SONOMA MTN RD

Good

Over: MATANZAS CREEK

0.5 MI S BENNET VALLEY RD, Sonoma, CA

Built 1930 Load: 17.2 t ADT: 1,400

WEST DRY CREEK RD

Good

Over: GRAPE CREEK

5.38 MI NW WESTSIDE RD, Sonoma, CA

Built 1928 Load: 17.2 t ADT: 200

CALETTI AVE

Good

Over: PRUITT CREEK

200 FT S OF SHILOH ROAD, Sonoma, CA

Built 1987 Load: 17.5 t ADT: 10,000

PETALUMA BLVD N

Good

Over: PETALUMA RIVER

0.2 MI S JCT US 101, Sonoma, CA

Built 1925 Load: 18.5 t ADT: 4,200

ARNOLD DR

Good

Over: SONOMA CR (GLEN ELLEN)

LONDON RANCH RD, Sonoma, CA

Built 1939 Load: 18.8 t ADT: 6,300

STATE ROUTE 12

Good

Over: SANTA ROSA CREEK

04-SON-012-T18.51-SRO, Sonoma, CA

Built 1956 Load: 19.8 t ADT: 40,750

LEVERONI RD

Good

Over: FELDER CREEK

1.45 MI W OF SR 12, Sonoma, CA

Built 1972 Load: 19.8 t ADT: 6,000

PETALUMA BLVD

Good

Over: SAN ANTONIO CREEK

04-SON-101-0.01, Sonoma, CA

Built 1929 Load: 20.4 t ADT: 100

MANOR LANE

Good

Over: ADOBE CREEK

0.77 MI N ADOBE RD, Sonoma, CA

Built 1960 Load: 20.7 t ADT: 150

ADOBE RD

Good

Over: LICHAU CREEK

0.08 MI E OLD REDWOOD HWY, Sonoma, CA

Built 1929 Load: 20.7 t ADT: 2,900

VALLEY FORD RD

Good

Over: BLOOMFIELD CREEK

0.2 MI W BLOOMFIELD RD, Sonoma, CA

Built 1970 Load: 21.1 t ADT: 2,900

STATE ROUTE 12

Good

Over: STUART CREEK

04-SON-012-30.80, Sonoma, CA

Built 1924 Load: 21.4 t ADT: 14,200

MONTGOMERY DR

Good

Over: SANTA ROSA CREEK RSEVR

0.1 M N MONTGOMERY DR, Sonoma, CA

Built 1950 Load: 21.4 t ADT: 4,000

FULTON STREET

Good

Over: PINER CREEK

0.3 MI S GUERNEVILLE RD, Sonoma, CA

Built 1970 Load: 21.4 t ADT: 22,350

COMMERCE BLVD

Good

Over: COPELAND CREEK

0.4 MI S RNPK EXPRESSWAY, Sonoma, CA

Built 1966 Load: 21.4 t ADT: 1,000

S ELY RD

Good

Over: ADOBE CREEK

0.1 MI SE CASA GRANDE AVE, Sonoma, CA

Built 1984 Load: 21.4 t ADT: 6,145

OLD GRAVENSTEIN HY

Good

Over: BLUCHER CREEK

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

Built 1925 Load: 23.0 t ADT: 1,562

BRIDGEWOOD DR

Good

Over: RINCON CREEK

0.1 MI N MTCTO BL SNTA R, Sonoma, CA

Built 1962 Load: 23.7 t ADT: 1,500

BROOKWOOD ROAD

Good

Over: SANTA ROSA CREEK

0.6 MI N OF RTE 12, Sonoma, CA

Built 1979 Load: 23.7 t ADT: 11,000

STATE ROUTE 128

Good

Over: HEADER DRAW

04-SON-128-5.26, Sonoma, CA

Built 1900 Load: 24.3 t ADT: 2,650

STATE ROUTE 116

Good

Over: BLUCHER CREEK

04-SON-116-29.83, Sonoma, CA

Built 1938 Load: 24.3 t ADT: 16,550

STATE ROUTE 116

Good

Over: GOSSAGE CREEK

04-SON-116-33.37, Sonoma, CA

Built 1936 Load: 24.3 t ADT: 16,000

STATE ROUTE 121

Good

Over: BRANCH ARROYO SECO

04-SON-121-8.51, Sonoma, CA

Built 1922 Load: 24.3 t ADT: 19,000

WB STATE ROUTE 12

Good

Over: SANTA ROSA AVE

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

Built 1964 Load: 24.3 t ADT: 36,500

RIVER RD

Good

Over: GREEN VALLEY CREEK

6.5 MI INTX WITH SR 116, Sonoma, CA

Built 1970 Load: 24.3 t ADT: 12,700

RINCONADA DR

Good

Over: DUCKER CREEK

0.3 M SOUTH OF MONTECITO, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 2,000

DRY CREEK RD

Good

Over: FOSS CREEK

1/4 MILE EAST OF SR 101, Sonoma, CA

Built 1962 Load: 24.3 t ADT: 17,950

COFFEY LN

Good

Over: PAULINE CREEK

COFFEY LN, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 7,000

LOWELL AVE

Good

Over: GOSSAGE CREEK

0.06 MI E GILMORE AVE, Sonoma, CA

Built 1972 Load: 24.3 t ADT: 150

STONY POINT RD

Good

Over: COLGAN CR FLD CNTRL CHAN

0.1 MI N/O TODD RD, Sonoma, CA

Built 1962 Load: 24.3 t ADT: 13,600

SKILLMAN LANE

Good

Over: WILSON CREEK

EAST OF THOMPSON LANE, Sonoma, CA

Built 1960 Load: 24.3 t ADT: 1,600

SOUTH ELY ROAD

Good

Over: SOUTH ELY CREEK

0.8 MI SE FRATES RD, Sonoma, CA

Built 1961 Load: 24.3 t ADT: 200

MARKET ST

Good

Over: DUTCH BILL CREEK

JUST S BOHEMIAN HWY, Sonoma, CA

Built 1958 Load: 24.3 t ADT: 200

CAZADERO HWY

Good

Over: ST ELMO CREEK

EAST OF NEWMARK AVE, Sonoma, CA

Built 1957 Load: 24.3 t ADT: 1,550

ROBLAR RD

Good

Over: AMERICANO CREEK

0.7 MI E JCT VALY FORD RD, Sonoma, CA

Built 1964 Load: 24.3 t ADT: 1,200

STATE ROUTE 12

Good

Over: OLIVE STREET

04-SON-012-R15.70-SRO, Sonoma, CA

Built 1964 Load: 24.9 t ADT: 36,500

STATE ROUTE 12

Good

Over: OLIVE STREET

04-SON-012-R15.70-SRO, Sonoma, CA

Built 1964 Load: 24.9 t ADT: 36,500

OLD RIVER RD

Good

Over: GREEN VALLEY CREEK

0.1 MI SE/O MARTINELLI RD, Sonoma, CA

Built 1949 Load: 25.3 t ADT: 150

STATE ROUTE 116

Good

Over: RUSSIAN RIVER

04-SON-116-10.38, Sonoma, CA

Built 1941 Load: 25.6 t ADT: 8,450

WESTSIDE RD

Good

Over: PORTER CREEK

1.0 MI N WOHLER BR, Sonoma, CA

Built 1921 Load: 26.2 t ADT: 1,738

YULUPA AVE

Good

Over: MATANZAS CREEK

0.2 M SOUTH CREEKSIDE RD, Sonoma, CA

Built 1961 Load: 26.2 t ADT: 10,000

BENNETT VALLEY RD

Good

Over: MATANZAS CREEK

7.7 MI W WARM SPRINGS RD, Sonoma, CA

Built 1929 Load: 26.6 t ADT: 5,800

ARMSTRONG WOODS RD

Good

Over: REDWOOD CREEK

JUST N/O SWTWTR SPNGS RD, Sonoma, CA

Built 1959 Load: 26.6 t ADT: 3,800

MONTE VISTA TERR

Good

Over: JOHNSON GULCH

IN MONTE RIO, Sonoma, CA

Built 2001 Load: 26.6 t ADT: 200

STATE ROUTE 37

Good

Over: TOLAY CREEK

04-SON-037-4.04, Sonoma, CA

Built 1931 Load: 27.2 t ADT: 32,000

STATE ROUTE 116

Good

Over: ADOBE CREEK

04-SON-116-36.19, Sonoma, CA

Built 1954 Load: 27.5 t ADT: 34,000

STWRT PT-SKGG SPRG

Good

Over: HAUPT CREEK

6.0 MI E OF SR 1, Sonoma, CA

Built 1937 Load: 28.5 t ADT: 200

MONTE VISTA TERRAC

Good

Over: HILLSIDE

NEAR BR. 20C0403, Sonoma, CA

Built 2008 Load: 29.2 t ADT: 211

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

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial