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)

Sort:

UP RR & BNSF RY

Over: STATE ROUTE 70

02-PLU-070-7.10, Plumas, CA

Built 1910 ADT: 1,345

UP RR & BNSF RY

Over: STATE ROUTE 89

02-PLU-089-8.58, Plumas, CA

Built 1908 ADT: 2,025

BNSF RY

Over: STATE ROUTE 89

02-PLU-089-27.36, Plumas, CA

Built 1931 ADT: 1,625

POWERHOUSE

Over: STATE ROUTE 70

02-PLU-070-3.95, Plumas, CA

Built 1949 ADT: 1,345

UP RR & BNSF RY

Over: STATE ROUTE 49

02-PLU-049-7.10, Plumas, CA

Built 1928 ADT: 1,150

NO DATA ENTERED

Over: BIG GRIZZLY CREEK

NO DATA ENTERED, Plumas, CA

Built 1974 ADT: 50

ROAD 24N05

Over: RED CLOVER CREEK

NO DATA ENTERED, Plumas, CA

Built 1954 ADT: 50

ROAD 22N10

Over: GRAY EAGLE CREEK

GRAY EAGLE LODGE, Plumas, CA

Built 1977 ADT: 50

ROAD 23N10

Over: POPLAR CREEK

POPLAR CREEK NEAR SLOAT, Plumas, CA

Built 1975 ADT: 50

ROAD 23N08

Over: TRIBUTARY TO JAMISON CR

NO DATA ENTERED, Plumas, CA

Built 1976 ADT: 50

ROAD 27N24Y

Over: INDIAN CREEK

CAMPGROUND - ANTELOPE LK, Plumas, CA

Built 1967 ADT: 50

ROAD 22N25

Over: PINCHARD CREEK

NO DATA ENTERED, Plumas, CA

Built 1949 ADT: 50

ROAD 23N10

Over: UPPER HOPKINS CREEK

NO DATA ENTERED, Plumas, CA

Built 1984 ADT: 50

ROAD 22N22

Over: LAVA CREEK

NO DATA ENTERED, Plumas, CA

Built 1971 ADT: 50

ROAD 22N43Y

Over: LOWER HOPKINS CREEK

NO DATA ENTERED, Plumas, CA

Built 1984 ADT: 5

ROAD 22N57

Over: BLACK ROCK CREEK

NO DATA ENTERED, Plumas, CA

Built 1981 ADT: 50

ROAD 22N57

Over: SO FORK FEATHER RIVER

NO DATA ENTERED, Plumas, CA

Built 1960 ADT: 40

ROAD 23N15

Over: LITTLE NORTH FORK/CG

NO DATA ENTERED, Plumas, CA

Built 1953 ADT: 50

ROAD 23N18

Over: TOLAND CREEK

NO DATA ENTERED, Plumas, CA

Built 1974 ADT: 50

ROAD 23N18

Over: COLDWATER CREEK

AT ARKANSAS RAVINE, Plumas, CA

Built 1960 ADT: 50

ROAD 23N68

Over: SO FORK ROCK CREEK

NO DATA ENTERED, Plumas, CA

Built 1966 ADT: 50

ROAD 24N29

Over: MEADOW VALLEY CREEK

MEADOW VALLEY CREEK, Plumas, CA

Built 1966 ADT: 50

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.4 MI E BCKWRTH-CALPN RD, Plumas, CA

Built 1908 Load: 6.8 t ADT: 40

PORT WINE ROAD

Over: SLATE CREEK

2.1 MI SE/O QUIN-LAPOR R, Plumas, CA

Built 1910 Load: 7.5 t ADT: 50

CAMPGROUND RD

Over: JAMISON CREEK

PLUMAS-EUREKA STATE PARK, Plumas, CA

Built 1963 Load: 12.0 t ADT: 275

BUCKS LAKE ROAD

Over: BIG GRIZZLEY CREEK

1.7MI W BUCKS LAKE DAM RD, Plumas, CA

Built 2011 Load: 12.6 t ADT: 350

RICH BAR RD

Over: E BR N FK FEATHER RIVER

0.3 MI S OF SH 70, Plumas, CA

Built 1932 Load: 13.9 t ADT: 10

CAMP LAYMAN ROAD

Over: MIDDLE FORK FEATHER RIV

0.2 MI SOUTH OF SR 70, Plumas, CA

Built 1938 Load: 15.2 t ADT: 35

GOPHER HILL LDFL R

Over: SPANISH CREEK

200FT N/O BUCKS LAKE RD, Plumas, CA

Built 1969 Load: 16.2 t ADT: 120

BUTT RESERVOIR RD

Over: BUTT RESERVOIR SPILLWAY

9.3 MI SOUTH OF SR 89, Plumas, CA

Built 1940 Load: 16.5 t ADT: 80

BIG SPRINGS RD/A13

Over: HAMILTON BRANCH CREEK

0.1 MI WEST OF SR 147, Plumas, CA

Built 1955 Load: 16.8 t ADT: 1,300

BLARSDEN GRAGLE RD

Over: MIDDLE FORK FEATHER RIV

0.5 MI NORTH OF S.H.89, Plumas, CA

Built 1910 Load: 16.8 t ADT: 370

SLOAT-POPLAR VLY R

Over: MIDDLE FORK FEATHER RIV

AT SLOAT RD, Plumas, CA

Built 1959 Load: 16.8 t ADT: 140

DIAMOND MTN RD

Over: COOKS CREEK

3.6 MI NE BCKWTH GRNVLE R, Plumas, CA

Built 1950 Load: 17.2 t ADT: 240

SCHNEIDER CR RD

Over: MEADOW VALLEY CREEK

0.3 MI S OF BUCKS LAKE RD, Plumas, CA

Built 1968 Load: 17.2 t ADT: 120

KEDDIE RESORT ROAD

Over: SPANISH CREEK

AT SR 70, Plumas, CA

Built 1914 Load: 17.8 t ADT: 140

WARNER VALLEY RD

Over: WARNER CREEK

13.4 MI NW SH36, Plumas, CA

Built 1965 Load: 18.5 t ADT: 90

GRNVILE WOLF CK RD

Over: WOLF CREEK

150 FT SOUTH OF SH 89, Plumas, CA

Built 1961 Load: 18.8 t ADT: 10

NELSON ST

Over: INDIAN CREEK

1.0 MI N ARLINGTON RD, Plumas, CA

Built 1941 Load: 19.1 t ADT: 280

RAILROAD STREET

Over: ESTRAY CREEK

0.2 MI SW SH 70, Plumas, CA

Built 1984 Load: 19.1 t ADT: 50

ROAD 23N37

Over: JAMISON CREEK

JAMISON CREEK, Plumas, CA

Built 1952 Load: 19.8 t ADT: 50

ROAD 22N94

Over: CASCADE CREEK

NO DATA ENTERED, Plumas, CA

Built 1966 Load: 20.1 t ADT: 60

OAKLAND CAMP ROAD

Over: SPANISH CREEK

4.3 MI N/O RTE 70, Plumas, CA

Built 1920 Load: 21.4 t ADT: 130

ROAD 23N18

Over: LITTLE NO FORK G BASIN

GRANITE BASIN, Plumas, CA

Built 1973 Load: 21.4 t ADT: 50

STATE ROUTE 70

Over: NORTH FORK FEATHER RIVER

02-PLU-070-16.54, Plumas, CA

Built 1934 Load: 21.7 t ADT: 1,345

BELDEN TOWN ROAD

Over: NORTH FORK FEATHER RIVER

0.01 MI SOUTH OF SR 70, Plumas, CA

Built 1912 Load: 23.3 t ADT: 170

STATE ROUTE 36

Over: NORTH FORK FEATHER RIVER

02-PLU-036-8.84, Plumas, CA

Built 1966 Load: 23.7 t ADT: 5,500

STATE ROUTE 70

Over: SPANISH CREEK

02-PLU-070-42.45, Plumas, CA

Built 1964 Load: 24.0 t ADT: 6,700

ROCKY POINT ROAD

Over: BIG GRIZZLY CREEK

0.5 MI S SH 70, Plumas, CA

Built 1962 Load: 24.0 t ADT: 130

GOLD LAKE FOR HWY

Over: FRAZIER CREEK

1.1 MI SE/O SH 89, Plumas, CA

Built 1967 Load: 24.0 t ADT: 620

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026