Colusa County, CA

211 public highway bridges

Colusa County Bridge Snapshot

Colusa County, California contains 211 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.4% are rated “Good,” 48.3% “Fair,” 6.2% “Poor,” and 6.2% 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.

211
Total Bridges
37.4%
Good
6.2%
Poor
6.2%
Structurally Deficient

Condition Distribution

Good
37.4% (79)
Fair
48.3% (102)
Poor
6.2% (13)
SD
6.2% (13)

All Bridges (211)

INTERSTATE 5

Fair

Over: FRESHWATER CREEK

03-COL-005-R19.66, Colusa, CA

Built 1971 Load: 41.1 t ADT: 15,000

DELPHOS RD

Fair

Over: FRESHWATER CREEK

0.4 MI N/O FRESHWATER RD, Colusa, CA

Built 1971 Load: 41.1 t ADT: 29

STATE ROUTE 20

Fair

Over: COLUSA TROUGH

03-COL-020-27.83, Colusa, CA

Built 1962 Load: 41.8 t ADT: 6,400

DANLEY ROAD

Fair

Over: LURLINE CREEK

AT LURLINE RD, Colusa, CA

Built 1974 Load: 42.1 t ADT: 152

INTERSTATE 5

Fair

Over: CORTINA CREEK

03-COL-005-R12.55, Colusa, CA

Built 1967 Load: 46.0 t ADT: 15,000

INTERSTATE 5 SB

Fair

Over: CNFR & OLD HWY 99W

03-COL-005-R16.57, Colusa, CA

Built 1971 Load: 48.0 t ADT: 14,000

INTERSTATE 5 NB

Fair

Over: CNFR & OLD HWY 99W

03-COL-005-R16.55, Colusa, CA

Built 1971 Load: 48.0 t ADT: 14,000

TWO MILE ROAD

Fair

Over: STONE CORRAL CREEK

1.9 MI N OF MAXWELL RD, Colusa, CA

Built 1983 Load: 48.9 t ADT: 76

CLARK AVENUE

Fair

Over: COLUSA DRAIN

1.5 MI S OF NORMAN RD, Colusa, CA

Built 1982 Load: 49.9 t ADT: 15

BRIM ROAD

Fair

Over: MILL CREEK

0.4 MI W BEAR VALLEY RD, Colusa, CA

Built 1986 Load: 51.2 t ADT: 11

BEAR VALLEY ROAD

Fair

Over: BEAR CREEK

0.2 MI S KEGAN RD, Colusa, CA

Built 1960 Load: 51.5 t ADT: 33

LURLINE AVE

Fair

Over: LURLINE CREEK

2.1 MI EAST OF I-5, Colusa, CA

Built 1981 Load: 54.4 t ADT: 108

BRIDGE ST

Fair

Over: SACRAMENTO RIVER

BETWEEN MAIN ST/RIV RD, Colusa, CA

Built 1980 Load: 55.4 t ADT: 2,006

COLLEGE CITY RD

Fair

Over: SOUTH FORK BRUSH CREEK

1.2 MI N OF WHITE RD, Colusa, CA

Built 1972 Load: 56.1 t ADT: 402

SUTTON ROAD

Fair

Over: FUNKS CREEK

0.25 MI N OF LENAHAN RD, Colusa, CA

Built 1964 Load: 59.6 t ADT: 65

FRESHWATER ROAD

Fair

Over: SALT CREEK

0.1 MI E OF I-5, Colusa, CA

Built 1968 Load: 61.6 t ADT: 829

INTERSTATE 5 NB

Fair

Over: STONE CORRAL CREEK

03-COL-005-R27.74, Colusa, CA

Built 1971 Load: 63.8 t ADT: 17,000

SITES-LODOGA RD

Fair

Over: SQUAW CREEK

21.8 MI W/O I-5, Colusa, CA

Built 1973 Load: 64.8 t ADT: 283

WALNUT DR

Fair

Over: SALT CREEK

1.5 MI E OF SR 20, Colusa, CA

Built 1970 Load: 65.4 t ADT: 181

LEESVILLE-LODGA RD

Good

Over: INDIAN CREEK

1.0 MI S LDOGA-STNYFD RD, Colusa, CA

Built 1930 Load: 16.2 t ADT: 69

WHITE ROAD

Good

Over: RD 108 10Q CANAL

1.4 MI W/O SR 45/BROWNING, Colusa, CA

Built 1926 Load: 16.2 t ADT: 59

OLD 99W

Good

Over: FRESHWATER CREEK

0.3 MI N FRESHWATER RD, Colusa, CA

Built 1930 Load: 16.8 t ADT: 1,797

SYCAMORE CUTOFF

Good

Over: IRRIGATION DITCH

0.1 MI N/E OF SR 45, Colusa, CA

Built 1930 Load: 16.8 t ADT: 1,085

HILLGATE ROAD

Good

Over: SALT CREEK

0.3 MI E OF ALMOND RD, Colusa, CA

Built 1965 Load: 17.2 t ADT: 952

POUNDSTONE ROAD

Good

Over: RD 108 MAIN CANAL

1.1 MI S OF TULE RD, Colusa, CA

Built 1930 Load: 21.4 t ADT: 62

FOUTS SPRINGS RD

Good

Over: SALT CREEK

0.2 MI W LADOGA-STNYFD RD, Colusa, CA

Built 1970 Load: 22.0 t ADT: 237

OLD 99W

Good

Over: LURLINE CREEK

2.0 MI NORTH OF HAAS RD, Colusa, CA

Built 1930 Load: 23.7 t ADT: 1,298

SR 20

Good

Over: POWELL SLOUGH

03-COL-020-28.54, Colusa, CA

Built 1915 Load: 24.3 t ADT: 6,400

OLD 99W

Good

Over: GLENN VALLEY SLOUGH OFLO

1.9 MI NORTH OF HAAS RD, Colusa, CA

Built 1914 Load: 24.3 t ADT: 1,298

BAGLEY RD

Good

Over: TEHAMA-COLUSA CANAL

2.8 MI W DANLEY RD, Colusa, CA

Built 1978 Load: 26.6 t ADT: 10

FRESHWATER RD

Good

Over: TEHAMA-COLUSA CANAL

3.4 MI W DANLEY RD, Colusa, CA

Built 1978 Load: 26.6 t ADT: 17

MCDERMOTT RD

Good

Over: STONE CORRAL CREEK

0.8 MI N OF MAXWELL-SITES, Colusa, CA

Built 1947 Load: 26.9 t ADT: 268

STATE ROUTE 20

Good

Over: STEER DITCH

03-COL-020-36.02, Colusa, CA

Built 1923 Load: 27.2 t ADT: 9,800

KING RD

Good

Over: TEHAMA-COLUSA CANAL

1.7 MI E OF S.R. 20, Colusa, CA

Built 1978 Load: 27.2 t ADT: 56

WALNUT DR

Good

Over: TEHAMA-COLUSA CANAL

1.2 MI E OF S.R. 20, Colusa, CA

Built 1978 Load: 27.9 t ADT: 178

MAXWELL ROAD

Good

Over: COLUSA TROUGH

2.4 MI E FOUR MI RD, Colusa, CA

Built 1972 Load: 28.5 t ADT: 2,282

CORTINA VINEYARD R

Good

Over: TEHAMA-COLUSA CANAL

1.1 MI S MEYER RD, Colusa, CA

Built 1976 Load: 28.8 t ADT: 62

STATE ROUTE 20

Good

Over: TEHAMA-COLUSA CANAL

03-COL-020-13.93, Colusa, CA

Built 1977 Load: 29.2 t ADT: 5,800

INTERSTATE 5

Good

Over: HILLGATE ROAD

03-COL-005-6.84, Colusa, CA

Built 1957 Load: 30.8 t ADT: 35,000

CORTINA SCHOOL RD

Good

Over: CORTINA CREEK

1.4 MI SOUTH MEYERS RD, Colusa, CA

Built 1970 Load: 31.1 t ADT: 473

ALMOND AVE

Good

Over: TEHAMA-COLUSA CANAL

0.8 MI S OF HILLGATE RD, Colusa, CA

Built 1976 Load: 31.1 t ADT: 450

WAGNER AVE

Good

Over: TEHAMA-COLUSA CANAL

0.2 MI W OF WILDWOOD RD, Colusa, CA

Built 1976 Load: 31.1 t ADT: 399

NONPAREIL AVE

Good

Over: TEHAMA-COLUSA CANAL

0.5 MI E OF WILDWOOD RD, Colusa, CA

Built 1976 Load: 31.1 t ADT: 60

GREENBAY ROAD

Good

Over: TEHAMA-COLUSA CANAL

0.7 MI E OF WILDWOOD RD, Colusa, CA

Built 1976 Load: 31.1 t ADT: 271

HARRINGTON AVE

Good

Over: TEHAMA-COLUSA CANAL

1.0 MI W OF I-5, Colusa, CA

Built 1976 Load: 31.1 t ADT: 243

INTERSTATE 5

Good

Over: SOUTH BRANCH SAND CREEK

03-COL-005-R8.51, Colusa, CA

Built 1967 Load: 32.4 t ADT: 29,500

INTERSTATE 5

Good

Over: CORTINA CREEK OVERFLOW

03-COL-005-R11.83, Colusa, CA

Built 1946 Load: 32.4 t ADT: 33,000

INTERSTATE 5

Good

Over: BRUSH CREEK

03-COL-005-R2.95, Colusa, CA

Built 1967 Load: 32.4 t ADT: 35,000

STATE ROUTE 20

Good

Over: REFUGE DRAIN

03-COL-020-28.81, Colusa, CA

Built 1983 Load: 32.4 t ADT: 7,750

STATE ROUTE 20

Good

Over: BEAR CREEK TRIBUTARY

03-COL-020-3.40, Colusa, CA

Built 2009 Load: 32.4 t ADT: 4,950

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