Lake County, CA

129 public highway bridges

Lake County Bridge Snapshot

Lake County, California contains 129 public highway bridges in the FHWA National Bridge Inventory. Roughly 27.1% are rated “Good,” 59.7% “Fair,” 7.8% “Poor,” and 7.8% 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.

129
Total Bridges
27.1%
Good
7.8%
Poor
7.8%
Structurally Deficient

Condition Distribution

Good
27.1% (35)
Fair
59.7% (77)
Poor
7.8% (10)
SD
7.8% (10)

All Bridges (129)

ROAD M01

Fair

Over: RATTLESNAKE CREEK

40 MI. NORTH OF UPPERLAKE, Lake, CA

Built 1966 Load: 32.7 t ADT: 20

EICKHOFF RD

Fair

Over: SCOTTS CREEK

0.1 MI N/O SCOTTS VALLEY, Lake, CA

Built 1984 Load: 33.0 t ADT: 56

WOLF CREEK ROAD

Fair

Over: WOLF CREEK

IN SPRING VALLEY LAKE DEV, Lake, CA

Built 1967 Load: 33.7 t ADT: 220

ELK MOUNTAIN ROAD

Fair

Over: MIDDLE CREEK

5.08 MI N OF SR 20, Lake, CA

Built 1959 Load: 34.0 t ADT: 175

STATE ROUTE 53

Fair

Over: SEIGLER CREEK

01-LAK-053-0.02, Lake, CA

Built 1952 Load: 35.0 t ADT: 16,500

BELL PARK AVE

Fair

Over: SEIGLER CREEK

S SR 29 IN LOWER LAKE, Lake, CA

Built 1966 Load: 35.6 t ADT: 200

MAIN STREET

Fair

Over: KELSEY CREEK

JUST E/O BELL HILL ROAD, Lake, CA

Built 1946 Load: 36.3 t ADT: 3,502

SODA BAY RD

Fair

Over: MANNING CREEK

0.9 MI E/O SR 29, Lake, CA

Built 1956 Load: 36.3 t ADT: 1,545

STATE ROUTE 29

Fair

Over: MARTIN STREET

01-LAK-029-R42.00, Lake, CA

Built 1972 Load: 36.9 t ADT: 6,725

ARGONAUT ROAD

Fair

Over: ADOBE CREEK

0.1 MI W THOMAS LANE, Lake, CA

Built 1966 Load: 37.3 t ADT: 206

STATE ROUTE 20

Fair

Over: MORRISON CREEK

01-LAK-020-16.81, Lake, CA

Built 1933 Load: 37.6 t ADT: 8,900

STATE ROUTE 29

Fair

Over: MARTIN STREET

01-LAK-029-R42.00, Lake, CA

Built 1972 Load: 37.9 t ADT: 6,725

BARTLETT SPRGS RD

Fair

Over: CACHE CREEK

23.5 MI E OF SR 20, Lake, CA

Built 1982 Load: 37.9 t ADT: 108

STATE ROUTE 29

Fair

Over: COYOTE CREEK

01-LAK-029-11.89, Lake, CA

Built 1948 Load: 38.2 t ADT: 9,000

SCOTTS VALLEY ROAD

Fair

Over: SCOTTS CREEK

3.0 MI E OF HWY 29, Lake, CA

Built 1960 Load: 38.6 t ADT: 2,140

QUAIL TRAIL

Fair

Over: WOLF CREEK

IN SPRING VALLEY LAKE DEV, Lake, CA

Built 1967 Load: 38.6 t ADT: 36

KONOCTI RD

Fair

Over: COLE CREEK

1/4 MI E MAIN ST, Lake, CA

Built 1987 Load: 38.6 t ADT: 1,155

ROAD M1

Fair

Over: BENMORE CREEK

9 MI. NE OF POTTER VALLEY, Lake, CA

Built 1970 Load: 38.9 t ADT: 300

ANDERSON SPRINGS R

Fair

Over: ANDERSON CREEK

0.8 MI W OF SR 175, Lake, CA

Built 1940 Load: 40.2 t ADT: 154

BUTTS CYN RD

Fair

Over: BUCKSNORT CREEK

6.8 MI SE/O SR 29, Lake, CA

Built 1969 Load: 40.8 t ADT: 1,900

SPRUCE GROVE ROAD

Fair

Over: COPSEY CREEK

0.3 MI EAST OF SR 29, Lake, CA

Built 1995 Load: 41.1 t ADT: 512

STATE ROUTE 29

Fair

Over: LUPIYOMA CREEK

01-LAK-029-6.84, Lake, CA

Built 1955 Load: 41.8 t ADT: 10,900

STATE ROUTE 29

Fair

Over: ADOBE CREEK

01-LAK-029-R37.57, Lake, CA

Built 1966 Load: 42.1 t ADT: 12,100

BARTLETT SPRNGS RD

Fair

Over: COMPLEXION CREEK

28 MI E OF SR 20, Lake, CA

Built 1960 Load: 42.1 t ADT: 103

STATE ROUTE 175

Fair

Over: DRY CREEK

01-LAK-175-27.48, Lake, CA

Built 1952 Load: 42.8 t ADT: 3,150

STATE ROUTE 20

Fair

Over: CLOVER CREEK

01-LAK-020-8.89, Lake, CA

Built 1975 Load: 44.1 t ADT: 8,000

NEW LONG VALLEY RD

Fair

Over: LONG VALLEY CREEK

2.3 MI N/O SR 20, Lake, CA

Built 1984 Load: 48.6 t ADT: 346

SYLAR LANE

Fair

Over: COLE CREEK

0.2 MI E/O STATE STREET, Lake, CA

Built 1965 Load: 59.0 t ADT: 250

BRIDGE ARBOR RD

Fair

Over: ROBINSON CREEK

0.4 MI E OF SR 29, Lake, CA

Built 1925 Load: 59.3 t ADT: 65

BOTTLE ROCK ROAD

Fair

Over: COLE CREEK

0.15 MI S OF S.R. 29, Lake, CA

Built 1971 Load: 59.6 t ADT: 1,205

CLARK DRIVE

Fair

Over: COLE CREEK

0.7 MI S/O SODA BAY RD, Lake, CA

Built 1940 Load: 60.9 t ADT: 114

BARTLETT SPRGS RD

Fair

Over: STANTON CREEK

19.6 MI N OF SR 20, Lake, CA

Built 1960 Load: 73.5 t ADT: 108

BARTLETT SPRGS RD

Fair

Over: KILPEPPER CREEK

12 MI N OF SR 20, Lake, CA

Built 1960 Load: 80.4 t ADT: 103

SOCRATES MINE RD

Fair

Over: GUNNING CREEK

1.9 MI W/O STATE RTE 175, Lake, CA

Built 1981 Load: 97.2 t ADT: 546

ROAD

Good

Over: TROUT CREEK

TROUT CREEK, Lake, CA

Built 2016 ADT: 50

BRIDGE ARBOR N RD

Good

Over: CLOVER CREEK

SOUTH OF SR 20 IN UPER LK, Lake, CA

Built 1931 Load: 6.2 t ADT: 80

FIRST STREET

Good

Over: CLOVER CREEK

0.1 MI E MAIN ST UPER LK, Lake, CA

Built 1930 Load: 15.2 t ADT: 400

LAKESHORE BLVD

Good

Over: LYONS CREEK

0.5 MI S/O NICE-LUCERNE R, Lake, CA

Built 1931 Load: 16.8 t ADT: 1,066

STATE ROUTE 20

Good

Over: MIDDLE CREEK

01-LAK-020-8.56, Lake, CA

Built 1959 Load: 21.1 t ADT: 8,000

STATE ROUTE 175

Good

Over: PUTAH CREEK

01-LAK-175-R24.95, Lake, CA

Built 1964 Load: 23.3 t ADT: 3,150

STATE ROUTE 29

Good

Over: SAINT HELENA CREEK

01-LAK-029-6.31, Lake, CA

Built 1934 Load: 25.3 t ADT: 10,900

PITNEY LN

Good

Over: ALLEY CREEK

0.3 MI E OF ELK MTN RD, Lake, CA

Built 1958 Load: 25.6 t ADT: 321

ROAD M10

Good

Over: BEAR CREEK

24 MI. N.E. OF UPPERLAKE, Lake, CA

Built 1973 Load: 30.1 t ADT: 20

STATE ROUTE 29

Good

Over: PUTAH CREEK

01-LAK-029-9.74, Lake, CA

Built 2003 Load: 32.4 t ADT: 10,900

STATE ROUTE 29

Good

Over: KELSEY CREEK

01-LAK-029-R34.97, Lake, CA

Built 1966 Load: 32.4 t ADT: 12,100

STATE ROUTE 29

Good

Over: HILL CREEK

01-LAK-029-R36.56, Lake, CA

Built 1966 Load: 32.4 t ADT: 12,100

STATE ROUTE 29

Good

Over: MANNING CREEK

01-LAK-029-R38.91, Lake, CA

Built 1966 Load: 32.4 t ADT: 12,100

SR 53

Good

Over: CACHE CREEK

01-LAK-053-1.00, Lake, CA

Built 1997 Load: 32.4 t ADT: 8,250

STATE ROUTE 20

Good

Over: BACHELOR CREEK

01-LAK-020-5.84, Lake, CA

Built 2022 Load: 32.4 t ADT: 10,600

STATE ROUTE 175

Good

Over: PUTAH CREEK

01-LAK-175-R24.00, Lake, CA

Built 1994 Load: 32.4 t ADT: 3,150

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