Lassen County, CA

108 public highway bridges

Lassen County Bridge Snapshot

Lassen County, California contains 108 public highway bridges in the FHWA National Bridge Inventory. Roughly 25% are rated “Good,” 64.8% “Fair,” 8.3% “Poor,” and 8.3% 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.

108
Total Bridges
25%
Good
8.3%
Poor
8.3%
Structurally Deficient

Condition Distribution

Good
25% (27)
Fair
64.8% (70)
Poor
8.3% (9)
SD
8.3% (9)

All Bridges (108)

U.S. HIGHWAY 395

Fair

Over: SOUTH TERMO DITCH

02-LAS-395-R114.25, Lassen, CA

Built 1971 Load: 32.4 t ADT: 1,200

FISH AND GAME ROAD

Fair

Over: SUSAN RIVER

1.6 MI. EAST OF MAPES LN, Lassen, CA

Built 1938 Load: 32.4 t ADT: 100

RICHMOND ROAD

Fair

Over: SUSAN RIVER

JUST N. OF RIVERSIDE DR., Lassen, CA

Built 1995 Load: 32.4 t ADT: 3,300

ALEXANDER AVE

Fair

Over: SUSAN RIVER

0.22 MI S OF S.H. 36, Lassen, CA

Built 1986 Load: 32.4 t ADT: 4,850

ON COUNTY ROAD 320

Fair

Over: SKEDADDLE CREEK

19.9 MI S/E OF US 395, Lassen, CA

Built 1988 Load: 32.4 t ADT: 200

CR312-BLICKENSTAFF

Fair

Over: DEEP CUT (BAXTER) CREEK

2.0 MI NE OF ROUTE 395, Lassen, CA

Built 2002 Load: 32.4 t ADT: 130

LEAVITT LN (CR213)

Fair

Over: SUSAN RIVER OVERFLOW

0.1 MI N OF US 395, Lassen, CA

Built 2009 Load: 32.4 t ADT: 1,500

MAPES LANE RD 305

Fair

Over: SUSAN RIVER OVERFLOW # 3

3.1 MI E OF LAMBERT LANE, Lassen, CA

Built 2016 Load: 32.4 t ADT: 130

MAPES LANE RD 305

Fair

Over: SUSAN RIVER OVERFLOW # 5

3.3 MI E OF LAMBERT LANE, Lassen, CA

Built 2016 Load: 32.4 t ADT: 130

HACKSTAFF ROAD

Fair

Over: LONG VALLEY CREEK

0.4 MI NE OF CR 361, Lassen, CA

Built 2021 Load: 32.4 t ADT: 80

CR316 (MCCLELLAND)

Fair

Over: NORTH FORK DILL SLOUGH

0.2 MI N OF CR 304, Lassen, CA

Built 1978 Load: 35.3 t ADT: 50

U.S. HIGHWAY 395

Fair

Over: GALEPPI UC

02-LAS-395-R17.51, Lassen, CA

Built 1969 Load: 36.3 t ADT: 5,500

STATE ROUTE 36

Fair

Over: SUSAN RIVER

02-LAS-036-R17.38, Lassen, CA

Built 1966 Load: 37.6 t ADT: 2,900

LASSEN ST

Fair

Over: SUSAN RIVER

0.3 MI S OF S.H. 36, Lassen, CA

Built 1965 Load: 37.9 t ADT: 400

JOHNSTONVILLE RD

Fair

Over: SUSAN RIVER

0.3 MI N OF US 395, Lassen, CA

Built 1921 Load: 38.2 t ADT: 600

STATE ROUTE 36

Fair

Over: ROBBERS CREEK

02-LAS-036-3.15, Lassen, CA

Built 1924 Load: 40.2 t ADT: 2,300

U.S. HIGHWAY 395

Fair

Over: LONG VALLEY CREEK OVFL

02-LAS-395-R21.34, Lassen, CA

Built 1969 Load: 41.1 t ADT: 5,500

CHAPPIUS LANE

Fair

Over: SUSAN RIVER

1.5 MI N OF SH 395, Lassen, CA

Built 1986 Load: 42.8 t ADT: 300

U.S. HIGHWAY 395

Fair

Over: WILLOW RANCH CREEK

02-LAS-395-R24.69, Lassen, CA

Built 1969 Load: 44.4 t ADT: 5,500

U.S. HIGHWAY 395

Fair

Over: EVANS CANYON RD

02-LAS-395-R0.10, Lassen, CA

Built 1976 Load: 50.2 t ADT: 4,600

U.S. HIGHWAY 395

Fair

Over: EVANS CANYON RD

02-LAS-395-R0.10, Lassen, CA

Built 1976 Load: 52.2 t ADT: 4,600

MAPES LANE RD 305

Fair

Over: SUSAN RIVER OVERFLOW #4

1.3 MI E OF RD 304, Lassen, CA

Built 2000 Load: 56.1 t ADT: 100

NO DATA ENTERED

Good

Over: PINE CREEK

NO DATA ENTERED, Lassen, CA

Built 1961 ADT: 20

PARK RIVERSIDE DR

Good

Over: SUSAN RIVER

0.6 MI E ALEXANDER DR, Lassen, CA

Built 1973 Load: 13.0 t ADT: 4,500

U.S. HIGHWAY 395

Good

Over: STANDISH IRRIG. CANAL

02-LAS-395-62.19, Lassen, CA

Built 1936 Load: 24.3 t ADT: 2,975

STATE ROUTE 299

Good

Over: RAINES CREEK

02-LAS-299-2.45, Lassen, CA

Built 1931 Load: 24.3 t ADT: 1,500

STATE ROUTE 299

Good

Over: BIEBER CREEK

02-LAS-299-19.83, Lassen, CA

Built 1928 Load: 24.3 t ADT: 1,050

STATE ROUTE 299

Good

Over: WILLOW CREEK

02-LAS-299-24.01, Lassen, CA

Built 1929 Load: 24.3 t ADT: 1,050

HERLONG ACCESS RD

Good

Over: LONG VALLEY CREEK

2.2 MI E US HWY 395, Lassen, CA

Built 1979 Load: 27.9 t ADT: 800

STATE ROUTE 299

Good

Over: BNSF RY

02-LAS-299-11.89, Lassen, CA

Built 1977 Load: 29.5 t ADT: 1,800

U.S. HIGHWAY 395

Good

Over: SUSAN RIVER

02-LAS-395-72.29, Lassen, CA

Built 1954 Load: 30.8 t ADT: 1,775

U.S. HIGHWAY 395

Good

Over: LONG VALLEY CREEK

02-LAS-395-26.19, Lassen, CA

Built 1946 Load: 32.4 t ADT: 5,500

STATE ROUTE 36

Good

Over: JENSEN SLOUGH

02-LAS-036-R26.36, Lassen, CA

Built 1964 Load: 32.4 t ADT: 15,300

STATE ROUTE 36

Good

Over: GOLD RUN CREEK

02-LAS-036-R27.36, Lassen, CA

Built 1964 Load: 32.4 t ADT: 10,300

STATE ROUTE 36

Good

Over: GOODRICH CREEK

02-LAS-036-7.30, Lassen, CA

Built 2021 Load: 32.4 t ADT: 2,300

MCCOY RD

Good

Over: SUSAN RIVER

1.6 MI S OF SR 44, Lassen, CA

Built 1989 Load: 32.4 t ADT: 100

COUNTY RD 311

Good

Over: DEEP CUT (BAXTER) CREEK

1.75 MI E OF CR A 3, Lassen, CA

Built 1988 Load: 32.4 t ADT: 150

CR 518 (SPALDING)

Good

Over: PINE CREEK

1.5 MI S EAGLE LAKE RD, Lassen, CA

Built 1976 Load: 32.4 t ADT: 1,800

ARMSTRONG ROAD

Good

Over: WILLOW CREEK

0.25 MI. S. OF SUSANV. RD, Lassen, CA

Built 1995 Load: 32.4 t ADT: 50

SKYLINE ROAD

Good

Over: SUSAN RIVER

0.15 MILE NE OF US 395, Lassen, CA

Built 2019 Load: 32.4 t ADT: 2,000

HACKSTAFF ROAD

Good

Over: LONG VALLEY CREEK

0.6 MI NE OF CR 361, Lassen, CA

Built 2021 Load: 32.4 t ADT: 80

STATE ROUTE 139

Good

Over: WILLOW CREEK

02-LAS-139-17.02, Lassen, CA

Built 1966 Load: 33.0 t ADT: 550

CONSERVATION CTR R

Good

Over: BROCKMAN SLOUGH

7.5 MI E OF SR 36, Lassen, CA

Built 1969 Load: 36.3 t ADT: 1,200

STATE ROUTE 139

Good

Over: MEADOW CHANNEL

02-LAS-139-16.92, Lassen, CA

Built 1966 Load: 41.1 t ADT: 550

BERT ROAD

Good

Over: LONG VALLEY CRK OVRFLOW

0.6 MI S OF US HWY 395, Lassen, CA

Built 1968 Load: 41.1 t ADT: 10

CR302 (LAMBERT LN)

Good

Over: HARTSON SLOUGH

0.4 MI SOUTH OF US 395, Lassen, CA

Built 2011 Load: 50.5 t ADT: 166

RD 302 (LAMBERT)

Good

Over: HARTSON SLOUGH OVERFLOW

0.3 MI SOUTH OF US 395, Lassen, CA

Built 2011 Load: 50.5 t ADT: 100

U.S. HIGHWAY 395

Good

Over: SCOTT UC

02-LAS-395-R1.09, Lassen, CA

Built 1976 Load: 52.2 t ADT: 4,600

U.S. HIGHWAY 395

Good

Over: SCOTT UC

02-LAS-395-R1.09, Lassen, CA

Built 1976 Load: 53.8 t ADT: 4,600

CR 305 (MAPES RD)

Poor

Over: HARTSON SLOUGH

0.4 MI E/O RD 303, Lassen, CA

Built 1978 ADT: 100

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