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 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.

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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.