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:

STATE ROUTE 70

Over: NORTH FORK FEATHER RIVER

02-PLU-070-6.99, Plumas, CA

Built 1936 Load: 24.3 t ADT: 1,345

STATE ROUTE 70

Over: GREENHORN CREEK

02-PLU-070-47.74, Plumas, CA

Built 1941 Load: 24.3 t ADT: 3,425

HARRIET LN

Over: MID FK FEATHER RIV OVRFL

1.4 MI S DYSON LN, Plumas, CA

Built 1963 Load: 24.3 t ADT: 125

N ARM ESIDE RD

Over: PETERS CREEK

3.8 MI NE OF BECKWRTH-GRD, Plumas, CA

Built 1955 Load: 24.3 t ADT: 100

STATE ROUTE 70

Over: BIG GRIZZLY CREEK

02-PLU-070-R78.64, Plumas, CA

Built 1969 Load: 24.6 t ADT: 3,400

CHANDLER ROAD

Over: SPANISH CR & GREENHRN CR

INTERSECT OAKLAND CAMP RD, Plumas, CA

Built 1953 Load: 24.6 t ADT: 520

HARRIET LANE

Over: MID FK FEATHER RIV OVRFL

1.2 MI S DYSON LN, Plumas, CA

Built 1963 Load: 24.9 t ADT: 125

HARRLET LN

Over: MID FK FEATHER RIV OVRFL

1.3 MI S DYSON LN, Plumas, CA

Built 1963 Load: 24.9 t ADT: 125

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

1.86 MI E BCKWTH-CLPIN RD, Plumas, CA

Built 1959 Load: 25.3 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

1.9 MI E BCKWRTH-CALPN RD, Plumas, CA

Built 1959 Load: 25.3 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

1.95 MI E BCKWTH-CLPIN RD, Plumas, CA

Built 1959 Load: 25.3 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.30 MI E BCKWTH-CLPIN RD, Plumas, CA

Built 1959 Load: 25.3 t ADT: 45

HARRIET LANE

Over: MID FK FEATHER RIV OVRFL

1.1 MI S DYSON LN, Plumas, CA

Built 1963 Load: 25.3 t ADT: 125

LAKE DAVIS ROAD

Over: LAKE DAVIS SPILLWAY

7.1 MI N/O SH 70, Plumas, CA

Built 1966 Load: 25.3 t ADT: 300

DRYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.5 MI E BCKWTH-CLPINE RD, Plumas, CA

Built 1962 Load: 25.6 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.55 MI E BCKWTH-CLPIN RD, Plumas, CA

Built 1962 Load: 25.6 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.6 MI E BCKWTH-CLPINE RD, Plumas, CA

Built 1962 Load: 25.6 t ADT: 45

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

2.65 MI E BCKWTH-CLPIN RD, Plumas, CA

Built 1962 Load: 25.6 t ADT: 22

ROUND HOUSE RD

Over: SPANISH CREEK

AT SH 70, Plumas, CA

Built 1940 Load: 26.2 t ADT: 60

STATE ROUTE 70

Over: NORTH FORK FEATHER RIVER

02-PLU-070-3.07, Plumas, CA

Built 1936 Load: 26.9 t ADT: 1,345

BECKWTH GRNVLE RD

Over: INDIAN CREEK

0.6 MI S BKWOTH GENESE RD, Plumas, CA

Built 1986 Load: 26.9 t ADT: 30

BECKWORTH GENESEE

Over: RED CLOVER CREEK

8.0 MI SE INDIAN CREEK RD, Plumas, CA

Built 1961 Load: 26.9 t ADT: 40

CLIO-STATE 40A RD

Over: MIDDLE FORK FEATHER RIV

0.1 MILE NORTH OF SR 89, Plumas, CA

Built 1953 Load: 27.2 t ADT: 570

WARNER VALLEY RD

Over: WARNER CREEK

9.1 MI NW OF SH 36, Plumas, CA

Built 1956 Load: 27.5 t ADT: 60

SPANISH RANCH RD

Over: SPANISH CREEK

INTERSECT BUCKS LAKE RD, Plumas, CA

Built 1962 Load: 28.8 t ADT: 50

GULLING STREET

Over: UP RR & BNSF RY

0.35 MI S SH 70, Plumas, CA

Built 1954 Load: 30.5 t ADT: 10,046

DYSON LANE

Over: MID FK FEATHER RIV OVRFL

0.9 MI E BCKWRTH-CALPN RD, Plumas, CA

Built 1959 Load: 31.8 t ADT: 22

BECKWOURTH GRNVLE

Over: LIGHTS CRK (DEADFALL BR)

JNCT DIAMOND MTN RD, Plumas, CA

Built 1947 Load: 32.1 t ADT: 345

STATE ROUTE 284

Over: LITTLE LAST CHANCE CREEK

02-PLU-284-5.60, Plumas, CA

Built 2000 Load: 32.4 t ADT: 640

STATE ROUTE 284

Over: LITTLE LAST CHANCE CREEK

02-PLU-284-7.31, Plumas, CA

Built 2000 Load: 32.4 t ADT: 640

STATE ROUTE 70

Over: SPANISH CREEK

02-PLU-070-35.32, Plumas, CA

Built 2012 Load: 32.4 t ADT: 3,375

MOHAWK HWY

Over: MIDDLE FORK FEATHER RIV

0.4 MI S/E OF S.H. 70, Plumas, CA

Built 1989 Load: 32.4 t ADT: 690

QUINCY-LA PORTE RD

Over: MIDDLE FORK FEATHER RIV

7.9 MI S/W SH 70, Plumas, CA

Built 1975 Load: 32.4 t ADT: 180

QUINCY-LA PORTE RD

Over: NELSON CREEK

10.4 MI SOUTH OF SH 70, Plumas, CA

Built 1986 Load: 32.4 t ADT: 180

MAIN STREET

Over: WOLF CREEK

0.2 MI SW SH 89, Plumas, CA

Built 1980 Load: 32.4 t ADT: 1,100

VIRGILIA ROAD

Over: E BR N FK FEATHER RIVER

0.1 MILE S OF SR 70, Plumas, CA

Built 1949 Load: 32.4 t ADT: 50

SENECA ROAD

Over: NORTH FORK FEATHER RIVER

5.6 MI S OF SH 89, Plumas, CA

Built 1983 Load: 32.4 t ADT: 80

DOTTA-GUIDICCI RD

Over: LAST CHANCE CREEK

0.6 MI W FRENCHMAN LKE RD, Plumas, CA

Built 1965 Load: 32.4 t ADT: 50

BKWTH GRNVILLE RD

Over: HOSSELKUS CREEK

0.3 MI W OF GENESSEE, Plumas, CA

Built 1983 Load: 32.4 t ADT: 115

STATE ROUTE 70

Over: CHIPPS CREEK

02-PLU-070-13.56, Plumas, CA

Built 1959 Load: 33.4 t ADT: 1,345

PAXTON RD

Over: E BR N FK FEATHER RIVER

AT SH 70, Plumas, CA

Built 1957 Load: 33.4 t ADT: 50

HUMBUG RD

Over: YELLOW CREEK

7.8 MI W HUMBG-HMBLT RD, Plumas, CA

Built 1960 Load: 33.4 t ADT: 35

QUINCY JUNCTION RD

Over: GREENHORN CREEK

2.2 MI N OF S.H. 70, Plumas, CA

Built 1955 Load: 34.7 t ADT: 930

SETZER CAMP RD

Over: WOLF CREEK

200 FT S OF SH 89, Plumas, CA

Built 1957 Load: 34.7 t ADT: 100

OLD RED BLUFF RD

Over: NORTH FORK FEATHER RIVER

7.0 MI W WARNER CREEK RD, Plumas, CA

Built 1956 Load: 36.0 t ADT: 130

BUTTERFLY VLY RD

Over: E BR N FK FEATHER RIVER

0.5 MI SE/O SR 70, Plumas, CA

Built 1950 Load: 36.3 t ADT: 20

FEATHER RIVER DR

Over: BRANCH CREEK

0.5 MI NW OF SH 36, Plumas, CA

Built 1966 Load: 36.6 t ADT: 400

STATE ROUTE 89

Over: MIDDLE FORK FEATHER RIV

02-PLU-089-8.23, Plumas, CA

Built 1955 Load: 37.3 t ADT: 2,025

BUCKS LAKE ROAD

Over: HASKINS CREEK

AT BUCKS LAKE, Plumas, CA

Built 1967 Load: 37.6 t ADT: 360

DIAMOND MOUNTAN RD

Over: E BRANCH LIGHTS CREEK

12.6 MI NE GRNVLE-BKWT RD, Plumas, CA

Built 1954 Load: 38.6 t ADT: 80

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