Mendocino County, CA

357 public highway bridges

Mendocino County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mendocino County, California contains 357 public highway bridges. Roughly 32.2% are rated “Good,” 51.8% “Fair,” and 7.3% “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.

357
Total Bridges
32.2%
Good
51.8%
Fair
7.3%
Poor Condition

Condition Distribution

Good
32.2% (115)
Fair
51.8% (185)
Poor
7.3% (26)

All Bridges (357)

IRR FRTBRG-SRWD RD

Fair

Over: RESERVATION CREEK

11 MI W/O US 101, Mendocino, CA

Built 1985 Load: 41.5 t ADT: 167

NORTH BUSH STREET

Fair

Over: ORRS CREEK

0.2 MI S OF LOW GAP RD, Mendocino, CA

Built 1972 Load: 42.1 t ADT: 4,692

FT BRAG-SHRWD RD

Fair

Over: SHERWOOD CREEK

2.7 MI S OF US 101, Mendocino, CA

Built 1987 Load: 43.4 t ADT: 126

U.S. HIGHWAY 101

Fair

Over: SOUTH FORK EEL RIVER

01-MEN-101-R102.68, Mendocino, CA

Built 1974 Load: 45.7 t ADT: 6,100

MENDOCINO PASS RD

Fair

Over: MIDDLE FORK EEL RIVER

10.5 MI EAST OF COVELO, Mendocino, CA

Built 1983 Load: 49.6 t ADT: 779

STATE ROUTE 1

Fair

Over: BRUSH CREEK

01-MEN-001-20.83, Mendocino, CA

Built 1956 Load: 50.2 t ADT: 1,800

STATE ROUTE 1

Fair

Over: JACK PETERS CREEK

01-MEN-001-51.87, Mendocino, CA

Built 1939 Load: 50.5 t ADT: 9,900

DOBIE RD

Fair

Over: TURNER CREEK

0.20 MI S CR 327-A, Mendocino, CA

Built 1979 Load: 52.8 t ADT: 210

CANYON RD

Fair

Over: BERRY CREEK

0.2 MI E JCT WITH E RD, Mendocino, CA

Built 1966 Load: 57.7 t ADT: 501

IRR SHERWOOD RD

Fair

Over: CURLEY COW CREEK

9 MI N/W OF US HWY 101, Mendocino, CA

Built 1988 Load: 60.6 t ADT: 377

SHERWOOD ROAD

Fair

Over: DUTCH HENRY CREEK

1.5 MI S OF RTE 101, Mendocino, CA

Built 1985 Load: 62.5 t ADT: 648

EAST HILL RD

Fair

Over: HAEHL CREEK

0.1 MI E CR 300, Mendocino, CA

Built 1980 Load: 62.9 t ADT: 1,438

STATE ROUTE 20

Fair

Over: EAST FORK RUSSIAN RIVER

01-MEN-020-36.36, Mendocino, CA

Built 1958 Load: 66.7 t ADT: 11,350

U.S. HIGHWAY 101

Fair

Over: RATTLESNAKE CREEK

01-MEN-101-R83.99, Mendocino, CA

Built 1952 Load: 99.9 t ADT: 6,200

U.S. HIGHWAY 101

Fair

Over: RED MOUNTAIN CREEK

01-MEN-101-M100.46, Mendocino, CA

Built 1955 Load: 99.9 t ADT: 6,100

U.S. HIGHWAY 101

Fair

Over: CEDAR CREEK

01-MEN-101-R89.24, Mendocino, CA

Built 1969 Load: 99.9 t ADT: 6,100

RG STATE PARK ROAD

Good

Over: RUSSIAN GULCH

RUSSIAN GULCH STATE PARK, Mendocino, CA

Built 1960 Load: 13.0 t ADT: 105

SOUTH MAIN STREET

Good

Over: BROADDUS CREEK

0.3 MI N OF SR 20-MAIN ST, Mendocino, CA

Built 1926 Load: 14.6 t ADT: 7,200

U.S. HIGHWAY 101

Good

Over: LONG VALLEY CREEK

01-MEN-101-61.32, Mendocino, CA

Built 1960 Load: 15.2 t ADT: 6,700

MAIN ST

Good

Over: EAST FORK RUSSIAN RIVER

0.5 MI E POWER HOUSE RD, Mendocino, CA

Built 1928 Load: 16.2 t ADT: 1,203

ANDERSON VALLEY HW

Good

Over: CON CREEK

1.2 MI N OF SR 128, Mendocino, CA

Built 1938 Load: 16.8 t ADT: 72

MOUNTAIN HOUSE RD

Good

Over: WILSON CREEK

2.8 MI S SR 101, Mendocino, CA

Built 1912 Load: 16.8 t ADT: 572

CENTER VALLEY RD

Good

Over: BAECHTEL CREEK

0.8 MI E SH 101, Mendocino, CA

Built 1953 Load: 19.8 t ADT: 1,166

STATE ROUTE 1

Good

Over: HOWARD CREEK

01-MEN-001-R80.55, Mendocino, CA

Built 1972 Load: 20.4 t ADT: 1,185

STATE ROUTE 128

Good

Over: SHEARING CREEK

01-MEN-128-34.49, Mendocino, CA

Built 1939 Load: 21.4 t ADT: 2,050

US HIGHWAY 101 SB

Good

Over: NCRA/NWP, FORD, MASONITE

01-MEN-101-R25.72, Mendocino, CA

Built 1964 Load: 21.7 t ADT: 10,450

US HIGHWAY 101 NB

Good

Over: NCRA/NWP, FORD, MASONITE

01-MEN-101-R25.72, Mendocino, CA

Built 1964 Load: 21.7 t ADT: 10,450

U.S. HIGHWAY 101

Good

Over: HILLSIDE ABOVE RIVER

01-MEN-101-2.47, Mendocino, CA

Built 1989 Load: 21.7 t ADT: 13,300

STEELE RD

Good

Over: TENMILE CREEK

0.3 MI W OF US 101, Mendocino, CA

Built 1980 Load: 22.7 t ADT: 347

STATE ROUTE 175

Good

Over: RUSSIAN RIVER

01-MEN-175-0.45, Mendocino, CA

Built 1940 Load: 24.0 t ADT: 4,800

U.S. HIGHWAY 101

Good

Over: ROSETTI CREEK

01-MEN-101-10.46, Mendocino, CA

Built 1942 Load: 24.3 t ADT: 13,800

STATE ROUTE 1

Good

Over: SOUTH FORK COTTONEVA CRK

01-MEN-001-87.82, Mendocino, CA

Built 1958 Load: 24.3 t ADT: 1,185

STATE ROUTE 20

Good

Over: BAECHTEL CREEK

01-MEN-020-33.64-WLTS, Mendocino, CA

Built 1937 Load: 24.6 t ADT: 18,350

STATE ROUTE 1

Good

Over: NAVARRO RIVER

01-MEN-001-40.18, Mendocino, CA

Built 1949 Load: 24.6 t ADT: 1,100

STATE ROUTE 162

Good

Over: GRIST CREEK

01-MEN-162-28.30, Mendocino, CA

Built 1983 Load: 24.9 t ADT: 2,200

U.S. HIGHWAY 101

Good

Over: CRAWFORD CREEK

01-MEN-101-14.62, Mendocino, CA

Built 1942 Load: 25.3 t ADT: 13,800

FOREST ROAD 360

Good

Over: NORTH FK OF S FK NOYO

1 MI N ROAD 300, Mendocino, CA

Built 1958 Load: 26.2 t ADT: 30

FOREST ROAD 300

Good

Over: NORTH FK OF SOUT FK NOYO

NE/O SAN FELIPE RD, Mendocino, CA

Built 1958 Load: 26.2 t ADT: 50

STATE ROUTE 128

Good

Over: ROBINSON CREEK

01-MEN-128-30.66, Mendocino, CA

Built 1939 Load: 26.6 t ADT: 2,300

STATE ROUTE 20

Good

Over: JAMES CREEK

01-MEN-020-20.00, Mendocino, CA

Built 1962 Load: 26.6 t ADT: 2,600

US HIGHWAY 101 SB

Good

Over: ACKERMAN CREEK

01-MEN-101-26.66, Mendocino, CA

Built 1962 Load: 26.6 t ADT: 13,750

US HIGHWAY 101 NB

Good

Over: ACKERMAN CREEK

01-MEN-101-26.66, Mendocino, CA

Built 1962 Load: 26.6 t ADT: 13,750

STATE ROUTE 1

Good

Over: CASPAR CREEK

01-MEN-001-R54.71, Mendocino, CA

Built 1966 Load: 27.2 t ADT: 9,900

BRANSCOMB RD

Good

Over: SOUTH FORK EEL RIVER

1.5 MI E WILDERNESS RDGE, Mendocino, CA

Built 1961 Load: 28.5 t ADT: 104

STATE ROUTE 1

Good

Over: MOAT CREEK

01-MEN-001-12.88, Mendocino, CA

Built 1939 Load: 28.8 t ADT: 2,900

US HIGHWAY 101 SB

Good

Over: HENSLEY CR,HENSLEY CR RD

01-MEN-101-27.00, Mendocino, CA

Built 1962 Load: 28.8 t ADT: 13,750

US HIGHWAY 101 NB

Good

Over: HENSLEY CR,HENSLEY CR RD

01-MEN-101-27.00, Mendocino, CA

Built 1962 Load: 28.8 t ADT: 13,750

IRR MINA RD

Good

Over: NORTH FORK EEL RIVER

4.2 MI S TRINITY CO LINE, Mendocino, CA

Built 1967 Load: 28.8 t ADT: 143

STATE ROUTE 162

Good

Over: LITTLE SLOUGH

01-MEN-162-32.14, Mendocino, CA

Built 1958 Load: 29.5 t ADT: 2,200

STATE ROUTE 271

Good

Over: CEDAR CREEK

01-MEN-271-5.22, Mendocino, CA

Built 1933 Load: 29.8 t ADT: 150

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.