Sioux County, IA

429 public highway bridges

Sioux County Bridge Snapshot

Sioux County, Iowa contains 429 public highway bridges in the FHWA National Bridge Inventory. Roughly 61.5% are rated “Good,” 34% “Fair,” 2.3% “Poor,” and 2.3% 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 IA 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.

429
Total Bridges
61.5%
Good
2.3%
Poor
2.3%
Structurally Deficient

Condition Distribution

Good
61.5% (264)
Fair
34% (146)
Poor
2.3% (10)
SD
2.3% (10)

All Bridges (429)

LOCAL

Fair

Over: SM STREAM

097450901, Sioux, IA

Built 1933 Load: 20.5 t ADT: 50

LOCAL

Fair

Over: SMALL STREAM

097451002, Sioux, IA

Built 1981 Load: 20.5 t ADT: 60

LOCAL

Fair

Over: SM STREAM

097451502, Sioux, IA

Built 1977 Load: 20.5 t ADT: 40

LOCAL

Fair

Over: SMALL

097461201, Sioux, IA

Built 1978 Load: 20.5 t ADT: 60

LOCAL

Fair

Over: SM STREAM

097462602, Sioux, IA

Built 1977 Load: 20.5 t ADT: 120

FM

Fair

Over: DRY RUN

097471201, Sioux, IA

Built 1977 Load: 20.5 t ADT: 71

LOCAL

Fair

Over: SMALL STREAM

097471302, Sioux, IA

Built 1900 Load: 20.5 t ADT: 110

LOCAL

Fair

Over: SMALL

097473201, Sioux, IA

Built 1995 Load: 20.5 t ADT: 15

LOCAL

Fair

Over: FLOYD RIVER

094441404, Sioux, IA

Built 1962 Load: 20.7 t ADT: 60

LOCAL

Fair

Over: FLOYD RIVER

094442203, Sioux, IA

Built 1963 Load: 20.7 t ADT: 30

LOCAL

Fair

Over: SMALL STREAM

095452601, Sioux, IA

Built 1954 Load: 21.1 t ADT: 50

LOCAL

Fair

Over: OTTER CR

097430702, Sioux, IA

Built 1963 Load: 21.2 t ADT: 11

FM

Fair

Over: OTTER CREEK

097430801, Sioux, IA

Built 1962 Load: 21.2 t ADT: 619

LOCAL

Fair

Over: OTTER CREEK

097430802, Sioux, IA

Built 1962 Load: 21.2 t ADT: 45

FM

Fair

Over: OTTER CREEK

097441201, Sioux, IA

Built 1962 Load: 21.2 t ADT: 619

LOCAL

Fair

Over: WEST BRANCH

094452001, Sioux, IA

Built 1938 Load: 22.0 t ADT: 26

IA 60 NB

Fair

Over: FLOYD RIVER TRIBUTARY

0.5 mi. S of SR K64, Sioux, IA

Built 1932 Load: 22.9 t ADT: 3,200

LOCAL

Fair

Over: SMALL STREAM

094463002, Sioux, IA

Built 1938 Load: 22.9 t ADT: 15

LOCAL

Fair

Over: CREEK

095462202, Sioux, IA

Built 1962 Load: 23.0 t ADT: 45

LOCAL

Fair

Over: SMALL STREAM

095462801, Sioux, IA

Built 1962 Load: 23.0 t ADT: 40

LOCAL

Fair

Over: SMALL STREAM

095443602, Sioux, IA

Built 1965 Load: 24.0 t ADT: 199

LOCAL

Fair

Over: SMALL STREAM

095471402, Sioux, IA

Built 1963 Load: 24.0 t ADT: 5

LOCAL

Fair

Over: SMALL STREAM

096432701, Sioux, IA

Built 1965 Load: 24.0 t ADT: 20

FM

Fair

Over: DRY CREEK

096450701, Sioux, IA

Built 1965 Load: 24.0 t ADT: 60

LOCAL

Fair

Over: FLOYD RIV

096431401, Sioux, IA

Built 1954 Load: 24.6 t ADT: 50

FM

Fair

Over: OTTER CREEK 2ND CHANNEL

097441201, Sioux, IA

Built 1962 Load: 24.6 t ADT: 619

LOCAL

Fair

Over: WEST BRANCH

094452901, Sioux, IA

Built 1984 Load: 25.1 t ADT: 30

LOCAL

Fair

Over: FLOYD RIVER

096432701, Sioux, IA

Built 1979 Load: 25.3 t ADT: 20

LOCAL

Fair

Over: SM STREAM

097430902, Sioux, IA

Built 1960 Load: 25.3 t ADT: 71

US 18

Fair

Over: WEST FORK FLOYD RIVER

2.0 mi. E of Jct. SR K64, Sioux, IA

Built 1976 Load: 25.6 t ADT: 5,200

FM

Fair

Over: W BRANCH FLOYD RIVER

094451701, Sioux, IA

Built 1942 Load: 25.9 t ADT: 548

LOCAL

Fair

Over: SMALL STREAM

094450802, Sioux, IA

Built 1969 Load: 26.6 t ADT: 40

FM

Fair

Over: ORANGE CITY SLOUGH

094451202, Sioux, IA

Built 1969 Load: 26.6 t ADT: 51

FM

Fair

Over: NO NAME CREEK

094473502, Sioux, IA

Built 1967 Load: 26.6 t ADT: 649

FM

Fair

Over: NO NAME CREEK

096440904, Sioux, IA

Built 1965 Load: 26.6 t ADT: 1,277

FM

Fair

Over: NO NAME CREEK

097433402, Sioux, IA

Built 1968 Load: 26.6 t ADT: 270

LOCAL

Fair

Over: FLOYD RIVER

094442803, Sioux, IA

Built 1966 Load: 26.8 t ADT: 26

IA 10

Fair

Over: ORANGE CITY SLOUGH

4.5 mi. E of US 75, Sioux, IA

Built 1977 Load: 26.9 t ADT: 4,060

FM

Fair

Over: WEST BRANCH

096443001, Sioux, IA

Built 1963 Load: 26.9 t ADT: 738

US 18

Fair

Over: FLOYD RIVER

0.2 W of Jct. SR L26, Sioux, IA

Built 1992 Load: 27.1 t ADT: 5,100

LOCAL

Fair

Over: WEST BRANCH

095452702, Sioux, IA

Built 1950 Load: 27.5 t ADT: 100

ALBANY AVE.N

Fair

Over: ORANGE CITY SLOUGH

095442804, Sioux, IA

Built 1973 Load: 27.9 t ADT: 3,610

LOCAL

Fair

Over: FLOYD RIVER

096433401, Sioux, IA

Built 1983 Load: 28.2 t ADT: 26

LOCAL

Fair

Over: OVER ABAND RR

094470802, Sioux, IA

Built 1963 Load: 28.8 t ADT: 34

LOCAL

Fair

Over: SMALL STREAM

094430401, Sioux, IA

Built 1960 Load: 29.5 t ADT: 50

FM

Fair

Over: ROCK RIVER OVERFLOW

097462102, Sioux, IA

Built 1950 Load: 29.8 t ADT: 2,963

FM

Fair

Over: SIXMILE CREEK

095460301, Sioux, IA

Built 1972 Load: 30.0 t ADT: 1,926

LOCAL

Fair

Over: W FORK FLOYD RIV

095453303, Sioux, IA

Built 1969 Load: 30.1 t ADT: 131

FM

Fair

Over: BURR OAK CREEK

097451402, Sioux, IA

Built 1967 Load: 30.1 t ADT: 1,097

B40

Fair

Over: FLOYD RIVER

095431001, Sioux, IA

Built 1977 Load: 30.4 t ADT: 1,795

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