Mendocino County, CA

357 public highway bridges

Mendocino County Bridge Snapshot

Mendocino County, California contains 357 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.2% are rated “Good,” 51.8% “Fair,” 7.3% “Poor,” and 7.3% 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.

357
Total Bridges
32.2%
Good
7.3%
Poor
7.3%
Structurally Deficient

Condition Distribution

Good
32.2% (115)
Fair
51.8% (185)
Poor
7.3% (26)
SD
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 U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial