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: SMALL

096462601, Sioux, IA

Built 1981 Load: 99.9 t ADT: 80

LOCAL

Fair

Over: SMALL

095453401, Sioux, IA

Built 1987 Load: 99.9 t ADT: 131

LOCAL

Fair

Over: SMALL

097433302, Sioux, IA

Built 1983 Load: 99.9 t ADT: 71

LOCAL

Fair

Over: SMALL

097461002, Sioux, IA

Built 1984 Load: 99.9 t ADT: 60

280TH ST

Fair

Over: SMALL

097440801, Sioux, IA

Built 1978 Load: 99.9 t ADT: 45

IA 10

Good

Over: DRAINAGE DITCH

1.3 mi. E of S.R. B-46, Sioux, IA

Built 1954 Load: 13.6 t ADT: 1,910

LOCAL

Good

Over: SMALL STREAM

094431602, Sioux, IA

Built 1977 Load: 20.5 t ADT: 26

LOCAL

Good

Over: SMALL STREAM

094433002, Sioux, IA

Built 1938 Load: 20.5 t ADT: 50

LOCAL

Good

Over: SMALL STREAM

094442602, Sioux, IA

Built 1977 Load: 20.5 t ADT: 45

LOCAL

Good

Over: SMALL STREAM

094450701, Sioux, IA

Built 1937 Load: 20.5 t ADT: 20

LOCAL

Good

Over: SMALL STREAM

094451102, Sioux, IA

Built 2002 Load: 20.5 t ADT: 40

LOCAL

Good

Over: SMALL STREAM

094452801, Sioux, IA

Built 1982 Load: 20.5 t ADT: 71

LOCAL

Good

Over: SMALL

094470402, Sioux, IA

Built 1978 Load: 20.5 t ADT: 50

LOCAL

Good

Over: SMALL

094470402, Sioux, IA

Built 1980 Load: 20.5 t ADT: 50

LOCAL

Good

Over: SMALL STREAM

094472301, Sioux, IA

Built 1977 Load: 20.5 t ADT: 26

LOCAL

Good

Over: SMALL STREAM

094473402, Sioux, IA

Built 1948 Load: 20.5 t ADT: 30

LOCAL

Good

Over: SMALL

094473402, Sioux, IA

Built 1980 Load: 20.5 t ADT: 30

LOCAL

Good

Over: SMALL STREAM

095430102, Sioux, IA

Built 1940 Load: 20.5 t ADT: 20

LOCAL

Good

Over: SMALL

095441701, Sioux, IA

Built 1979 Load: 20.5 t ADT: 45

LOCAL

Good

Over: STREAM

095450102, Sioux, IA

Built 1978 Load: 20.5 t ADT: 131

LOCAL

Good

Over: SIXMILE CREEK

095460302, Sioux, IA

Built 1937 Load: 20.5 t ADT: 71

LOCAL

Good

Over: SMALL STREAM

095460901, Sioux, IA

Built 1938 Load: 20.5 t ADT: 80

LOCAL

Good

Over: SMALL STREAM

095460902, Sioux, IA

Built 1947 Load: 20.5 t ADT: 60

LOCAL RD

Good

Over: SIX MILE CREEK

095471801, Sioux, IA

Built 1992 Load: 20.5 t ADT: 15

LOCAL

Good

Over: DRY CREEK

095473101, Sioux, IA

Built 1938 Load: 20.5 t ADT: 60

LOCAL

Good

Over: SMALL STREAM

096441801, Sioux, IA

Built 1938 Load: 20.5 t ADT: 15

LOCAL

Good

Over: NO NAME CREEK

096441802, Sioux, IA

Built 1900 Load: 20.5 t ADT: 40

LOCAL

Good

Over: SMALL

096450702, Sioux, IA

Built 1940 Load: 20.5 t ADT: 45

LOCAL

Good

Over: SMALL

096461902, Sioux, IA

Built 1978 Load: 20.5 t ADT: 20

LOCAL

Good

Over: SMALL STREAM

096463502, Sioux, IA

Built 1938 Load: 20.5 t ADT: 40

LOCAL

Good

Over: SMALL

097431801, Sioux, IA

Built 1941 Load: 20.5 t ADT: 15

LOCAL

Good

Over: SM STREAM

097433502, Sioux, IA

Built 1937 Load: 20.5 t ADT: 34

LOCAL

Good

Over: SM STREAM

097440101, Sioux, IA

Built 2002 Load: 20.5 t ADT: 20

LOCAL

Good

Over: SM STREAM

097440501, Sioux, IA

Built 1977 Load: 20.5 t ADT: 26

LOCAL

Good

Over: SM STREAM

097450102, Sioux, IA

Built 1977 Load: 20.5 t ADT: 60

LOCAL

Good

Over: SM STREAM

097450401, Sioux, IA

Built 1931 Load: 20.5 t ADT: 20

LOCAL

Good

Over: SM STREAM

097450702, Sioux, IA

Built 1947 Load: 20.5 t ADT: 40

LOCAL

Good

Over: SMALL

097452301, Sioux, IA

Built 1978 Load: 20.5 t ADT: 34

LOCAL

Good

Over: SMALL

097453002, Sioux, IA

Built 1980 Load: 20.5 t ADT: 80

DOVE AVE

Good

Over: SMALL STREAM

094463002, Sioux, IA

Built 2021 Load: 21.0 t ADT: 15

IA 12

Good

Over: DRAINAGE

1.3 mi. S of Jct. IA 10, Sioux, IA

Built 1954 Load: 22.7 t ADT: 1,120

LOCAL

Good

Over: SMALL STREAM

094483502, Sioux, IA

Built 1977 Load: 22.9 t ADT: 34

LOCAL

Good

Over: OTTER CREEK

097440201, Sioux, IA

Built 1987 Load: 25.1 t ADT: 50

DOGWOOD AVE

Good

Over: SMALL STREAM

094472502, Sioux, IA

Built 2022 Load: 25.5 t ADT: 26

IA 10

Good

Over: SPRING CREEK

2.1 mi W of jct SR K-30, Sioux, IA

Built 1987 Load: 25.6 t ADT: 2,040

LOCAL

Good

Over: SIX MILE CREEK

094470701, Sioux, IA

Built 1983 Load: 27.3 t ADT: 45

FM

Good

Over: WEST BRANCH FLOYD RIVER

095452301, Sioux, IA

Built 1983 Load: 27.3 t ADT: 120

B62

Good

Over: SMALL

094473501, Sioux, IA

Built 1978 Load: 28.6 t ADT: 30

LOCAL

Good

Over: FLOYD RIVER

095432005, Sioux, IA

Built 1940 Load: 28.6 t ADT: 30

LOCAL

Good

Over: SMALL STREAM

097450502, Sioux, IA

Built 1986 Load: 29.0 t ADT: 34

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