Plumas County, CA

170 public highway bridges

Plumas County Bridge Snapshot

Plumas County, California contains 170 public highway bridges in the FHWA National Bridge Inventory. Roughly 25.9% are rated “Good,” 67.1% “Fair,” 4.1% “Poor,” and 4.1% 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.

170
Total Bridges
25.9%
Good
4.1%
Poor
4.1%
Structurally Deficient

Condition Distribution

Good
25.9% (44)
Fair
67.1% (114)
Poor
4.1% (7)
SD
4.1% (7)

All Bridges (170)

GRNVLE RND VLY RD

Fair

Over: NORTH CANYON CREEK

0.8 MI S OF SH 89, Plumas, CA

Built 1957 Load: 38.6 t ADT: 110

BECKWRTH-GENESSEE

Fair

Over: RED CLOVER CREEK

3 MI S OF BIG INDIAN CRRD, Plumas, CA

Built 1962 Load: 38.9 t ADT: 10

DIAMOND MTN RD

Fair

Over: LIGHTS CREEK

9.4 MI NE BECKWRTH-GRN RD, Plumas, CA

Built 1997 Load: 39.2 t ADT: 80

STAMPFLI LN

Fair

Over: INDIAN CREEK

0.6 MI E OF SR 89, Plumas, CA

Built 1954 Load: 39.9 t ADT: 370

PORT WINE ROAD

Fair

Over: SLATE CREEK OVERFLOW

2 MI SE/O QUIN-LAPORT RD, Plumas, CA

Built 1936 Load: 40.5 t ADT: 30

1ST AVENUE

Fair

Over: NORTH FORK FEATHER RIVER

0.1 MI S OF S.H. 36, Plumas, CA

Built 1947 Load: 40.8 t ADT: 960

STAMPFLI LANE

Fair

Over: INDIAN CREEK

2.9 MI E SR 89, Plumas, CA

Built 1965 Load: 41.1 t ADT: 400

RICH GULCH RD

Fair

Over: RUSH CREEK

0.4 MI N OF SR 70, Plumas, CA

Built 1955 Load: 41.1 t ADT: 30

HUMBUG ROAD

Fair

Over: BUTT CREEK

1.2 MI W HUMBG-HUMBLT RD, Plumas, CA

Built 1960 Load: 42.4 t ADT: 35

DIXIE CNYN RD

Fair

Over: ROUND VALLEY LAKE OUTLET

2.9 MI SW OF SH 89, Plumas, CA

Built 1930 Load: 42.4 t ADT: 55

ROAD 21N02

Fair

Over: SULPHUR CREEK

SULPHUR CREEK, Plumas, CA

Built 1964 Load: 42.8 t ADT: 50

STATE ROUTE 70

Fair

Over: INDIAN CREEK

02-PLU-070-33.07, Plumas, CA

Built 1954 Load: 43.1 t ADT: 3,375

BUCKS LAKE ROAD

Fair

Over: ROCK CREEK

4.3 MI W/O SR 70, Plumas, CA

Built 1969 Load: 43.4 t ADT: 1,700

BECKWRTH-GEHN RD

Fair

Over: INDIAN CREEK

400 FT S OF INDIAN CR RD, Plumas, CA

Built 1956 Load: 46.3 t ADT: 10

ST LOUIS RD

Fair

Over: SLATE CREEK

AT PLUMAS CO LINE, Plumas, CA

Built 1990 Load: 47.3 t ADT: 50

BECKWORTH CALPINE

Fair

Over: MIDDLE FORK FEATHER RIV

0.2 MI SOUTH OF SH 70, Plumas, CA

Built 1961 Load: 48.9 t ADT: 1,090

DYSON LANE

Fair

Over: MID FK FEATHER RIV OVRFL

0.8 MI E BCKWRTH-CALPN RD, Plumas, CA

Built 1959 Load: 48.9 t ADT: 22

HUMBOLDT ROAD

Fair

Over: SOLDIERS MEADOW CREEK

5.0 MI W OF SH 89, Plumas, CA

Built 1970 Load: 49.9 t ADT: 40

DIAMOND MTN RD

Fair

Over: LIGHTS CREEK

4.9 MI NE GRNVLE-BECK RD, Plumas, CA

Built 1956 Load: 58.6 t ADT: 70

NO DATA ENTERED

Good

Over: WEST BRANCH LIGHTS CREEK

NO DATA ENTERED, Plumas, CA

Built 2022 ADT: 2

ROAD 23N08

Good

Over: POPLAR CREEK

POPLAR CREEK, Plumas, CA

Built 1966 ADT: 50

ROAD 24N85Y

Good

Over: BIG GRIZZLY CREEK

BIG GRIZZLY CREEK, Plumas, CA

Built 1974 ADT: 50

ROAD 22N94

Good

Over: SOUTH BR MIDDLE FORK

NO DATA ENTERED, Plumas, CA

Built 1957 ADT: 60

ROAD 22N94

Good

Over: LGV DAM SPILLWAY APPROCH

500 FT NORTH OF LGV DAM, Plumas, CA

Built 1966 ADT: 50

ROAD 23N10

Good

Over: EAST BRANCH HOPKINS CREK

NO DATA ENTERED, Plumas, CA

Built 1984 ADT: 50

ROAD 22N57

Good

Over: LOWER KENZIE RAVINE

NO DATA ENTERED, Plumas, CA

Built 1960 ADT: 40

ROAD 27N26

Good

Over: MOSQUITO CREEK

CARIBOU ROAD, Plumas, CA

Built 1984 ADT: 50

ROAD 27N17

Good

Over: RUSH CREEK

RUSH CREEK, Plumas, CA

Built 1977 ADT: 25

GREENVILLE PARK RD

Good

Over: WOLF CREEK

0.1 MI S HOT SPRINGS RD, Plumas, CA

Built 1987 Load: 13.9 t ADT: 50

ARLINGTON RD

Good

Over: INDIAN CREEK

0.1 MI W/O BCKW-GRNV RD, Plumas, CA

Built 1964 Load: 19.4 t ADT: 280

21N10 IN L.B. CG

Good

Over: GRAY EAGLE CK

WITHIN CAMPGROUND, Plumas, CA

Built 1995 Load: 20.7 t ADT: 50

ROAD 26N04

Good

Over: LAST CHANCE CREEK

LAST CHANCE CREEK, Plumas, CA

Built 1973 Load: 21.1 t ADT: 50

STATE ROUTE 70

Good

Over: NORTH FORK FEATHER RIVER

02-PLU-070-5.58, Plumas, CA

Built 1936 Load: 22.4 t ADT: 1,345

ARLINGTON RD

Good

Over: INDIAN CREEK

0.1 MI E/O SR 89, Plumas, CA

Built 1964 Load: 22.7 t ADT: 780

STATE ROUTE 89

Good

Over: GRAEAGLE CREEK

02-PLU-089-7.29, Plumas, CA

Built 1954 Load: 24.3 t ADT: 2,025

STATE ROUTE 70

Good

Over: CLEAR STREAM

02-PLU-070-42.86, Plumas, CA

Built 1937 Load: 24.3 t ADT: 6,700

ROAD 26N70

Good

Over: DIXIE CREEK

DIXIE CREEK, Plumas, CA

Built 2002 Load: 24.6 t ADT: 150

STATE ROUTE 70

Good

Over: UP RR & BNSF RY

02-PLU-070-35.56, Plumas, CA

Built 1932 Load: 25.9 t ADT: 3,375

STATE ROUTE 147

Good

Over: HAMILTON BRANCH CREEK

02-PLU-147-8.98, Plumas, CA

Built 2018 Load: 26.9 t ADT: 1,525

SLOAT ROAD

Good

Over: LONG VALLEY CREEK

1.2 MI S/W SH 70, Plumas, CA

Built 1989 Load: 26.9 t ADT: 180

STATE ROUTE 36

Good

Over: BAILEY CREEK

02-PLU-036-R13.73, Plumas, CA

Built 1966 Load: 28.5 t ADT: 5,000

STATE ROUTE 89

Good

Over: FRAZIER CREEK

02-PLU-089-6.29, Plumas, CA

Built 1954 Load: 29.5 t ADT: 1,015

STATE ROUTE 70

Good

Over: CHAMBERS CREEK

02-PLU-070-9.04, Plumas, CA

Built 1959 Load: 32.4 t ADT: 1,345

STATE ROUTE 89

Good

Over: SULPHUR CREEK

02-PLU-089-3.40, Plumas, CA

Built 2002 Load: 32.4 t ADT: 1,015

STATE ROUTE 89

Good

Over: BNSF RY

02-PLU-089-19.90, Plumas, CA

Built 1988 Load: 32.4 t ADT: 3,050

STATE ROUTE 89

Good

Over: WOLF CREEK

02-PLU-089-20.01, Plumas, CA

Built 1988 Load: 32.4 t ADT: 3,050

STATE ROUTE 70

Good

Over: GREENHORN CR, UP RR,BNSF

02-PLU-070-51.21, Plumas, CA

Built 1956 Load: 32.4 t ADT: 3,425

STATE ROUTE 284

Good

Over: LITTLE LAST CHANCE CREEK

02-PLU-284-7.01, Plumas, CA

Built 2000 Load: 32.4 t ADT: 640

STATE ROUTE 70

Good

Over: YELLOW CREEK

02-PLU-070-14.90, Plumas, CA

Built 2020 Load: 32.4 t ADT: 1,345

STATE ROUTE 89

Good

Over: LAKE ALMANOR SPILLWAY

02-PLU-089-29.97, Plumas, CA

Built 2018 Load: 32.4 t ADT: 1,150

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