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)

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

FOREST ROAD 330

Poor

Over: PARLIN CREEK

PARLIN FORK CONSERVATION, Mendocino, CA

Built 2005 ADT: 25

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

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

U.S. HIGHWAY 101

Poor

Over: LONG VALLEY CREEK

01-MEN-101-59.90, Mendocino, CA

Built 1957 Load: 39.5 t ADT: 6,700

ORR SPRINGS RD

Poor

Over: SOUTH FORK BIG RIVER

19.8 MI W OF US 101, Mendocino, CA

Built 1955 Load: 45.4 t ADT: 134

FOREST ROAD 452

Poor

Over: HARE CREEK

WEST OF JCT FOREST RD 400, Mendocino, CA

Built 1997 Load: 49.9 t ADT: 10

STATE ROUTE 20

Poor

Over: RUSSIAN RIV, NCRA/NWP RR

01-MEN-020-33.63, Mendocino, CA

Built 1958 Load: 52.2 t ADT: 11,500

STATE ROUTE 162

Poor

Over: OUTLET CREEK

01-MEN-162-0.70, Mendocino, CA

Built 1958 Load: 57.0 t ADT: 860

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