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 BIA RTE 167

Fair

Over: CAHTO CREEK

2.4 KM SW OF LAYTONVILLE, Mendocino, CA

Built 1978 Load: 24.8 t ADT: 3,000

STATE ROUTE 1

Fair

Over: SCHOONER GULCH

01-MEN-001-11.28, Mendocino, CA

Built 1941 Load: 24.9 t ADT: 2,900

U.S. HIGHWAY 101

Fair

Over: FELIZ CREEK

01-MEN-101-10.68, Mendocino, CA

Built 1934 Load: 25.3 t ADT: 13,800

STATE ROUTE 128

Fair

Over: NORTH FORK NAVARRO RIVER

01-MEN-128-12.68, Mendocino, CA

Built 1953 Load: 25.3 t ADT: 3,300

STATE ROUTE 253

Fair

Over: ROBINSON CREEK

01-MEN-253-15.06, Mendocino, CA

Built 1962 Load: 25.3 t ADT: 2,300

NAVARRO RIDGE ROAD

Fair

Over: HAY CREEK

3.6 MI E JCT SR 1, Mendocino, CA

Built 1980 Load: 25.3 t ADT: 417

U.S. HIGHWAY 101

Fair

Over: NCRRA/NWP RR

01-MEN-101-R9.53, Mendocino, CA

Built 1966 Load: 25.6 t ADT: 13,800

STATE ROUTE 175

Fair

Over: DOOLEY CREEK

01-MEN-175-0.82, Mendocino, CA

Built 1946 Load: 26.2 t ADT: 4,800

LAKE MENDOCINO DR

Fair

Over: RUSSIAN RIVER

1 MI E OF US 101, Mendocino, CA

Built 1987 Load: 26.2 t ADT: 2,514

N STATE ST

Fair

Over: ACKERMAN CREEK

0.2 MI N ORR SPRINGS RD, Mendocino, CA

Built 1965 Load: 26.2 t ADT: 15,534

JACK OF HEARTS ROA

Fair

Over: DARK Canyon crk

14.2 mi NE of DeHaven, Mendocino, CA

Built 1985 Load: 26.2 t ADT: 50

STATE ROUTE 253

Fair

Over: ANDERSON CREEK

01-MEN-253-0.54, Mendocino, CA

Built 1965 Load: 26.6 t ADT: 2,300

STATE ROUTE 162

Fair

Over: BLOODY RUN CREEK

01-MEN-162-7.13, Mendocino, CA

Built 1959 Load: 26.6 t ADT: 860

REEVES CANYON ROAD

Fair

Over: MILL CREEK

2.2 MI WEST OF US 101, Mendocino, CA

Built 2012 Load: 26.6 t ADT: 100

STATE ROUTE 1

Fair

Over: SALMON CREEK

01-MEN-001-43.00, Mendocino, CA

Built 1950 Load: 26.9 t ADT: 3,100

HEARST-WILLITS RD

Fair

Over: HAILY CREEK

7.6 MI N JCT TOMKI RD, Mendocino, CA

Built 1980 Load: 26.9 t ADT: 387

US HIGHWAY 101 NB

Fair

Over: ROBINSON CREEK

01-MEN-101-20.91, Mendocino, CA

Built 1963 Load: 27.2 t ADT: 7,350

EAST ROAD

Fair

Over: SALT HOLLOW CREEK

2.15 MI N SH 20, Mendocino, CA

Built 1940 Load: 27.2 t ADT: 4,439

STATE ROUTE 271

Fair

Over: HILLSIDE ABOVE RIVER

01-MEN-271-18.39, Mendocino, CA

Built 1947 Load: 27.5 t ADT: 95

US HIGHWAY 101 SB

Fair

Over: NCRA/NWP RR & NORGARD LN

01-MEN-101-R22.16, Mendocino, CA

Built 1964 Load: 27.5 t ADT: 10,450

US HIGHWAY 101 NB

Fair

Over: NCRA/NWP RR & NORGARD LN

01-MEN-101-R22.16, Mendocino, CA

Built 1964 Load: 27.5 t ADT: 10,450

LAYTNVLLE-DOS RIOS

Fair

Over: BURGER CREEK

4.8 MI E/O JCT US 101, Mendocino, CA

Built 1888 Load: 27.5 t ADT: 137

COMPTCHE-UKIAH RD

Fair

Over: NORTH FORK ALBION RIVER

13.4 MI E JCT SR 1, Mendocino, CA

Built 1965 Load: 27.9 t ADT: 1,316

ORR SPRINGS RD

Fair

Over: ACKERMAN CREEK

2.0 MI W US 101, Mendocino, CA

Built 1956 Load: 28.5 t ADT: 3,101

EUREKA HILL ROAD

Fair

Over: GARCIA RIVER

4.9 MI W OF RTE 1, Mendocino, CA

Built 1969 Load: 29.2 t ADT: 330

STATE ROUTE 128

Fair

Over: BEEBE CREEK

01-MEN-128-38.80, Mendocino, CA

Built 1931 Load: 29.5 t ADT: 2,050

U.S. HIGHWAY 101

Fair

Over: ST RTE 271 (@ PM 19.46)

01-MEN-101-R103.81, Mendocino, CA

Built 1970 Load: 29.8 t ADT: 6,100

BRICELAND RD CR435

Fair

Over: MATTOLE RIVER

0.75 MI S HUM CO LINE, Mendocino, CA

Built 1967 Load: 30.1 t ADT: 26

FOREST ROAD 300

Fair

Over: PARLIN CREEK

BY JCT RD 320 & RD 340, Mendocino, CA

Built 1958 Load: 30.1 t ADT: 50

STATE ROUTE 271

Fair

Over: BIG DANN CREEK

01-MEN-271-4.92, Mendocino, CA

Built 1933 Load: 30.5 t ADT: 150

STATE ROUTE 1

Fair

Over: LITTLE RIVER

01-MEN-001-48.05, Mendocino, CA

Built 1955 Load: 30.5 t ADT: 4,550

STATE ROUTE 162

Fair

Over: SHORT CREEK

01-MEN-162-34.03, Mendocino, CA

Built 1962 Load: 30.8 t ADT: 2,200

STATE ROUTE 1

Fair

Over: GUALALA RIVER

01-MEN-001-0.01, Mendocino, CA

Built 1958 Load: 30.8 t ADT: 4,200

U.S. HIGHWAY 101

Fair

Over: MARION LANE

01-MEN-101-R88.80, Mendocino, CA

Built 1970 Load: 30.8 t ADT: 6,100

CLOVER RD

Fair

Over: WILLITS CREEK

0.02 MI S BIRCH ST, Mendocino, CA

Built 1967 Load: 31.1 t ADT: 850

STATE ROUTE 20

Fair

Over: BROADDUS CREEK

01-MEN-020-R32.82-WLTS, Mendocino, CA

Built 1966 Load: 31.4 t ADT: 5,450

U.S. HIGHWAY 101

Fair

Over: OUTLET CREEK

01-MEN-101-50.66, Mendocino, CA

Built 1979 Load: 32.4 t ADT: 6,950

U.S. HIGHWAY 101

Fair

Over: TEN MILE CREEK

01-MEN-101-66.50, Mendocino, CA

Built 1953 Load: 32.4 t ADT: 6,750

U.S. HIGHWAY 101

Fair

Over: BRIDGES CREEK

01-MEN-101-97.47, Mendocino, CA

Built 1980 Load: 32.4 t ADT: 6,100

STATE ROUTE 20

Fair

Over: COLD CREEK

01-MEN-020-R39.16, Mendocino, CA

Built 1965 Load: 32.4 t ADT: 10,400

STATE ROUTE 1 SB

Fair

Over: OCEANSIDE BLUFF

01-MEN-001-3.81, Mendocino, CA

Built 2003 Load: 32.4 t ADT: 4,200

U.S. HIGHWAY 101

Fair

Over: ROCK CREEK

01-MEN-101-93.71, Mendocino, CA

Built 2000 Load: 32.4 t ADT: 6,100

STATE ROUTE 128

Fair

Over: DRY CREEK

01-MEN-128-43.44, Mendocino, CA

Built 2005 Load: 32.4 t ADT: 2,300

STATE ROUTE 128

Fair

Over: ANDERSON CREEK

01-MEN-128-28.29, Mendocino, CA

Built 2005 Load: 32.4 t ADT: 5,200

U.S. HIGHWAY 101

Fair

Over: PIETA CREEK

01-MEN-101-R5.94, Mendocino, CA

Built 2003 Load: 32.4 t ADT: 13,300

U.S. HIGHWAY 101

Fair

Over: SR 271 (@ PM 3.38)

01-MEN-101-R87.67, Mendocino, CA

Built 1967 Load: 32.4 t ADT: 6,150

STATE ROUTE 162

Fair

Over: CORRAL CREEK

01-MEN-162-2.21, Mendocino, CA

Built 1959 Load: 32.4 t ADT: 860

U.S. HIGHWAY 101

Fair

Over: BEAR PEN RD (PRIVATE)

01-MEN-101-R101.06, Mendocino, CA

Built 1976 Load: 32.4 t ADT: 6,100

U.S. HIGHWAY 101

Fair

Over: DORA CREEK

01-MEN-101-96.49, Mendocino, CA

Built 1985 Load: 32.4 t ADT: 6,100

U.S. HIGHWAY 101

Fair

Over: FORSYTHE CREEK

01-MEN-101-R31.88, Mendocino, CA

Built 1990 Load: 32.4 t ADT: 19,000

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