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)

FOREST ROAD 200

Good

Over: CHAMBERLAIN CREEK

1.0 MI N JCT SR 20, Mendocino, CA

Built 1958 Load: 32.4 t ADT: 75

FOREST ROAD 200

Good

Over: PARK GULCH

0.5 MI N JCT SR 20, Mendocino, CA

Built 1958 Load: 32.4 t ADT: 75

STATE ROUTE 20

Good

Over: COLD CREEK

01-MEN-020-R38.31, Mendocino, CA

Built 1967 Load: 33.0 t ADT: 10,400

STATE ROUTE 162

Good

Over: MILL CREEK

01-MEN-162-30.33, Mendocino, CA

Built 1958 Load: 33.7 t ADT: 2,200

STATE ROUTE 1

Good

Over: RUSSIAN GULCH

01-MEN-001-52.64, Mendocino, CA

Built 1939 Load: 33.7 t ADT: 9,900

STATE ROUTE 162

Good

Over: EEL RIVER

01-MEN-162-8.25, Mendocino, CA

Built 1938 Load: 34.0 t ADT: 860

MOUNTAIN VIEW RD

Good

Over: ROBINSON CREEK

0.05 MILES FROM SR 128, Mendocino, CA

Built 1968 Load: 34.0 t ADT: 575

STATE ROUTE 1

Good

Over: BLUE SLIDE GULCH

01-MEN-001-75.00, Mendocino, CA

Built 1946 Load: 34.3 t ADT: 830

STATE ROUTE 1

Good

Over: COTTONEVA CREEK

01-MEN-001-90.60, Mendocino, CA

Built 1958 Load: 35.0 t ADT: 810

US HIGHWAY 101

Good

Over: HAEHL CREEK

01-MEN-101-R43.85, Mendocino, CA

Built 2016 Load: 35.3 t ADT: 8,000

SR 175 WB

Good

Over: HILLSIDE

01-MEN-175-8.50, Mendocino, CA

Built 1986 Load: 35.6 t ADT: 4,800

US HIGHWAY 101

Good

Over: HAEHL CREEK

01-MEN-101-R43.84, Mendocino, CA

Built 2016 Load: 36.0 t ADT: 8,000

STATE ROUTE 1

Good

Over: JUAN CREEK

01-MEN-001-82.91, Mendocino, CA

Built 1961 Load: 36.3 t ADT: 1,185

STATE ROUTE 1

Good

Over: HARDY CREEK

01-MEN-001-83.78, Mendocino, CA

Built 1959 Load: 37.3 t ADT: 1,185

US HIGHWAY 101 SB

Good

Over: DOOLIN CREEK

01-MEN-101-R23.59, Mendocino, CA

Built 1964 Load: 38.9 t ADT: 10,450

US HIGHWAY 101 NB

Good

Over: DOOLIN CREEK

01-MEN-101-R23.59, Mendocino, CA

Built 1964 Load: 38.9 t ADT: 10,450

S101-TALMAGE RD

Good

Over: DOOLIN CREEK

01-MEN-101-R23.59, Mendocino, CA

Built 1964 Load: 39.9 t ADT: 4,000

US HIGHWAY 101 SB

Good

Over: ORRS CREEK

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

Built 1964 Load: 40.8 t ADT: 10,450

US HIGHWAY 101 NB

Good

Over: ORRS CREEK

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

Built 1964 Load: 40.8 t ADT: 10,450

STATE ROUTE 20

Good

Over: COLD CREEK

01-MEN-020-R39.65, Mendocino, CA

Built 1967 Load: 42.4 t ADT: 10,400

STATE ROUTE 1

Good

Over: HARE CREEK

01-MEN-001-59.67, Mendocino, CA

Built 1947 Load: 42.4 t ADT: 14,500

IRR EAST LANE

Good

Over: SHORT CREEK

2.17 MI E SH 162, Mendocino, CA

Built 1973 Load: 43.1 t ADT: 210

STATE ROUTE 20

Good

Over: COLD CREEK

01-MEN-020-R40.85, Mendocino, CA

Built 1967 Load: 43.7 t ADT: 10,400

ORR SPRINGS RD

Good

Over: SOUTH FORK BIG RIVER

14.8 MI W SH 101, Mendocino, CA

Built 1976 Load: 45.0 t ADT: 134

HAWN CREEK RD

Good

Over: WILLIAMS CREEK

0.5 MI S GIBSON LANE, Mendocino, CA

Built 1930 Load: 45.0 t ADT: 1,375

STATE ROUTE 1

Good

Over: WAGES CREEK

01-MEN-001-78.30, Mendocino, CA

Built 1977 Load: 46.7 t ADT: 830

FORD ST

Good

Over: ORRS CREEK

0.2 MI E OF N STATE ST., Mendocino, CA

Built 1977 Load: 46.7 t ADT: 1,751

NORTH STATE ST

Good

Over: MASONITE HAUL ROAD

100 FT S OF ORR SPRING RD, Mendocino, CA

Built 1949 Load: 52.8 t ADT: 8,701

FISH ROCK RD

Good

Over: RANCHERIA CREEK

0.05 MI W SH 128, Mendocino, CA

Built 1978 Load: 54.8 t ADT: 429

STATE ROUTE 128

Good

Over: FLYNN CREEK

01-MEN-128-11.63, Mendocino, CA

Built 1955 Load: 59.0 t ADT: 3,300

EAST SIDE ROAD

Good

Over: BERRY CREEK

0.1 MI S CANYON ROAD, Mendocino, CA

Built 1981 Load: 68.7 t ADT: 182

LOW GAP ROAD

Poor

Over: MASONITE INDUSTRIAL ROAD

6.7 MI S ORR SPRINGS ROAD, Mendocino, CA

Built 1960 ADT: 25

FOREST ROAD 610

Poor

Over: SOUTH FORK CASPAR CREEK

N OF INT OF FOREST RD 600, Mendocino, CA

Built 1965 ADT: 2

FOREST ROAD 330

Poor

Over: PARLIN CREEK

PARLIN FORK CONSERVATION, Mendocino, CA

Built 2005 ADT: 25

STATE PARK ROAD

Poor

Over: LITTLE RIVER

VAN DAMME STATE PARK, Mendocino, CA

Built 1951 ADT: 150

ROAD M1

Poor

Over: BLACK BUTTE RIVER

.3 MI. E. OF EEL RIV W.C., Mendocino, CA

Built 1986 ADT: 50

HILL ROAD

Poor

Over: MILL CREEK

2.0 MI E FAIRBANKS RD, Mendocino, CA

Built 1925 Load: 6.5 t ADT: 78

REEVES CANYON ROAD

Poor

Over: MILL CREEK

3.1 MI W SR 101, Mendocino, CA

Built 1981 Load: 14.9 t ADT: 105

MOUNTAIN VIEW RD

Poor

Over: RANCHERIA CREEK

4.0 MI E/O RTE 128, Mendocino, CA

Built 1935 Load: 14.9 t ADT: 195

PHILO GREENWOOD RD

Poor

Over: NAVARRO RIVER

0.4 MI W OF SR 128, Mendocino, CA

Built 1949 Load: 17.2 t ADT: 418

GUALALA ROAD

Poor

Over: NORTH FORK GUALALA RIVER

2 MI E JCT SR 1, Mendocino, CA

Built 1940 Load: 17.2 t ADT: 97

GIBSON LANE

Poor

Over: EAST FORK RUSSIAN RIVER

0.4 MI W EEL RIVER RD, Mendocino, CA

Built 1955 Load: 17.2 t ADT: 561

SHERWOOD RD

Poor

Over: SHERWOOD CREEK

0.5 MI W JCT SHERWOOD RD, Mendocino, CA

Built 1979 Load: 18.8 t ADT: 137

N STATE ST

Poor

Over: YORK CREEK

2.3 MI N OF 101, Mendocino, CA

Built 1980 Load: 19.4 t ADT: 7,012

MOORE AVE

Poor

Over: WEST BRANCH RUSSIAN RIV

0.1 MI E JCT N STATE ST, Mendocino, CA

Built 1958 Load: 22.4 t ADT: 2,776

STATE ROUTE 1

Poor

Over: ALBION RIVER

01-MEN-001-43.74, Mendocino, CA

Built 1944 Load: 22.7 t ADT: 2,100

LAMBERT LANE

Poor

Over: ROBINSON CREEK

0.1 MI W OF SR 128, Mendocino, CA

Built 1954 Load: 24.3 t ADT: 379

CAMP 1 TEN MILE RD

Poor

Over: SOUTH FORK TENMILE RIVER

1.88 MILES EAST OF SR 1, Mendocino, CA

Built 1965 Load: 29.5 t ADT: 2

FRONTAGE ROAD

Poor

Over: LONG VALLEY CREEK

01-MEN-101-61.82, Mendocino, CA

Built 1960 Load: 33.0 t ADT: 200

FOREST ROAD 400

Poor

Over: BUNKER GULCH

E OF JCT ROAD 440, Mendocino, CA

Built 1992 Load: 33.0 t ADT: 10

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.