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)

FM

Good

Over: SMALL STREAM

094442102, Sioux, IA

Built 1985 Load: 29.8 t ADT: 2,539

62

Good

Over: WILLOW CREEK

094443601, Sioux, IA

Built 1984 Load: 29.8 t ADT: 31

LOCAL

Good

Over: SIX MILE CREEK

095472802, Sioux, IA

Built 1984 Load: 29.8 t ADT: 20

K64

Good

Over: SMALL STREAM

096440804, Sioux, IA

Built 1984 Load: 29.8 t ADT: 1,277

FM

Good

Over: DRY CREEK

096472502, Sioux, IA

Built 1982 Load: 29.8 t ADT: 60

LOCAL

Good

Over: NO NAME CREEK

096473405, Sioux, IA

Built 1982 Load: 29.8 t ADT: 60

FM

Good

Over: WILLOW CR

094431702, Sioux, IA

Built 1973 Load: 30.0 t ADT: 722

FM

Good

Over: SPRING CREEK

094470202, Sioux, IA

Built 1974 Load: 30.0 t ADT: 748

FM

Good

Over: NO NAME CREEK

096471702, Sioux, IA

Built 1971 Load: 30.0 t ADT: 718

LOCAL

Good

Over: WEST BRANCH FLOYD RIVER

095451401, Sioux, IA

Built 1983 Load: 30.2 t ADT: 34

FM

Good

Over: SIXMILE CREEK

095462002, Sioux, IA

Built 1973 Load: 30.2 t ADT: 957

FM

Good

Over: DRY CREEK

096473402, Sioux, IA

Built 1973 Load: 30.2 t ADT: 529

FM

Good

Over: BURR OAK CREEK

097460104, Sioux, IA

Built 1973 Load: 30.2 t ADT: 1,087

LOCAL

Good

Over: BRANCH OF ROCK RIVER

097472301, Sioux, IA

Built 1983 Load: 30.2 t ADT: 131

K64

Good

Over: FLOYD RIVER

094443302, Sioux, IA

Built 1975 Load: 30.4 t ADT: 995

FM

Good

Over: W BRANCH FLOYD RIVER

094453201, Sioux, IA

Built 1977 Load: 30.4 t ADT: 71

IA 10

Good

Over: SIX MILE CREEK

1.7 mi. W of W jct SR K22, Sioux, IA

Built 1987 Load: 31.5 t ADT: 2,210

LOCAL

Good

Over: SMALL STREAM

094433001, Sioux, IA

Built 1996 Load: 32.3 t ADT: 11

IA 12

Good

Over: SIX MILE CREEK

2.1 mi. N of SR C12, Sioux, IA

Built 2013 Load: 32.4 t ADT: 1,120

LOCAL

Good

Over: SMALL STREAM

095452903, Sioux, IA

Built 1998 Load: 32.4 t ADT: 45

IA 10

Good

Over: WILLOW CREEK

0.8 mi. E of SR L14, Sioux, IA

Built 2008 Load: 32.5 t ADT: 1,980

FM

Good

Over: NO NAME

094432002, Sioux, IA

Built 1974 Load: 33.0 t ADT: 722

L22

Good

Over: WILLOW CREEK

095432602, Sioux, IA

Built 1955 Load: 33.0 t ADT: 359

FM

Good

Over: CREEK

095443501, Sioux, IA

Built 1968 Load: 33.0 t ADT: 71

FM

Good

Over: NO NAME

095462101, Sioux, IA

Built 1974 Load: 33.0 t ADT: 898

FM

Good

Over: NO NAME CREEK

095471502, Sioux, IA

Built 1973 Load: 33.0 t ADT: 369

LOCAL

Good

Over: SMALL STREAM

097452703, Sioux, IA

Built 1960 Load: 33.0 t ADT: 1,117

FM

Good

Over: SMALL CREEK

097472902, Sioux, IA

Built 1976 Load: 33.0 t ADT: 718

FM

Good

Over: SIX MILE CREEK

096462502, Sioux, IA

Built 1982 Load: 33.4 t ADT: 1,337

IA 60 SB

Good

Over: WILLOW CREEK

0.7 mi. N of Jct. SR B40, Sioux, IA

Built 2003 Load: 33.6 t ADT: 2,485

IA 60 NB

Good

Over: WILLOW CREEK

0.7 mi. N of Jct. SR B40, Sioux, IA

Built 2003 Load: 33.6 t ADT: 2,485

370TH ST

Good

Over: NO NAME CREEK

096452701, Sioux, IA

Built 1965 Load: 33.7 t ADT: 988

FM

Good

Over: STREAM

096471101, Sioux, IA

Built 1960 Load: 33.7 t ADT: 210

L 22

Good

Over: SMALL

097433402, Sioux, IA

Built 2004 Load: 33.7 t ADT: 270

L14 KINGBIRD AVE

Good

Over: NO NAME CREEK

096431802, Sioux, IA

Built 2016 Load: 34.0 t ADT: 578

FM

Good

Over: NO NAME CREEK

097431101, Sioux, IA

Built 1965 Load: 34.0 t ADT: 609

LOCAL

Good

Over: SMALL

094471802, Sioux, IA

Built 1960 Load: 34.0 t ADT: 11

LILY AVE

Good

Over: SMALL

096432202, Sioux, IA

Built 2008 Load: 34.0 t ADT: 270

KINGBIRD AVE

Good

Over: SMALL

096433002, Sioux, IA

Built 2010 Load: 34.0 t ADT: 578

LOCAL

Good

Over: SM STREAM

097461201, Sioux, IA

Built 1931 Load: 34.1 t ADT: 61

L22

Good

Over: SMALL STREAM

094430202, Sioux, IA

Built 1955 Load: 34.3 t ADT: 366

FM

Good

Over: CREEK

095440801, Sioux, IA

Built 1965 Load: 34.3 t ADT: 2,992

FM

Good

Over: CREEK

095460201, Sioux, IA

Built 1977 Load: 34.3 t ADT: 1,926

LOCAL

Good

Over: SMALL

097440901, Sioux, IA

Built 1978 Load: 34.3 t ADT: 80

LARCH AVE

Good

Over: SMALL

096432102, Sioux, IA

Built 1954 Load: 34.3 t ADT: 20

K52

Good

Over: SMALL STREAM

096452602, Sioux, IA

Built 1978 Load: 34.7 t ADT: 1,257

LOCAL

Good

Over: SM STREAM

097450201, Sioux, IA

Built 2005 Load: 34.7 t ADT: 71

IA 60 NB

Good

Over: LITTLE FLOYD RIVER

0.4 mi. S of Jct. SR L26, Sioux, IA

Built 2005 Load: 35.1 t ADT: 3,250

IA 60 SB

Good

Over: LITTLE FLOYD RIVER

0.4 mi. S of SR L26, Sioux, IA

Built 2006 Load: 35.1 t ADT: 3,250

L 14

Good

Over: OTTER CREEK

097440102, Sioux, IA

Built 1991 Load: 35.2 t ADT: 1,267

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