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)

US 18

Good

Over: ROCK RIVER

0.3 mi. W of Jct SR K24, Sioux, IA

Built 2002 Load: 35.6 t ADT: 3,040

FM

Good

Over: SMALL

094433501, Sioux, IA

Built 1983 Load: 36.0 t ADT: 41

LOCAL

Good

Over: SMALL STREAM

094451902, Sioux, IA

Built 1984 Load: 36.0 t ADT: 34

K30 ELMWOOD AVE

Good

Over: ROCK RIVER

097461606, Sioux, IA

Built 2017 Load: 36.0 t ADT: 2,963

US 75

Good

Over: W FORK FLOYD RIVER

0.1 mi N of Jct. IA 10, Sioux, IA

Built 1989 Load: 36.5 t ADT: 7,300

IA 12

Good

Over: DRY CREEK

0.4 mi. S of IA 10, Sioux, IA

Built 1963 Load: 36.5 t ADT: 2,750

FM

Good

Over: SIX MILE CREEK

095462001, Sioux, IA

Built 1978 Load: 36.9 t ADT: 898

LOCAL

Good

Over: SMALL

094440902, Sioux, IA

Built 1940 Load: 36.9 t ADT: 2,930

LOCAL

Good

Over: SIX MILE CREEK

094482602, Sioux, IA

Built 1990 Load: 37.2 t ADT: 45

IA 60 NB

Good

Over: FLOYD RIVER

0.7 mi S of jct IA 10, Sioux, IA

Built 2002 Load: 37.4 t ADT: 2,035

K30 EAGLE AVE

Good

Over: SMALL STREAM

094462902, Sioux, IA

Built 2019 Load: 37.6 t ADT: 638

US 18

Good

Over: ROCK RIVER OVERFLOW

0.7 mi. W of Jct SR K24, Sioux, IA

Built 1989 Load: 37.7 t ADT: 3,040

FM

Good

Over: SIX MILE CREEK

095472202, Sioux, IA

Built 1993 Load: 37.9 t ADT: 439

FM

Good

Over: SMALL

095 44 19 01, Sioux, IA

Built 2009 Load: 38.9 t ADT: 60

LOCAL

Good

Over: SM STREAM

097462702, Sioux, IA

Built 2011 Load: 38.9 t ADT: 240

LOCAL

Good

Over: W BR FLOYD RIVER

095452701, Sioux, IA

Built 1990 Load: 39.5 t ADT: 50

LOCAL

Good

Over: FLOYD RIVER

096432301, Sioux, IA

Built 2005 Load: 39.9 t ADT: 139

LOCAL

Good

Over: NO NAME CREEK

094441601, Sioux, IA

Built 2011 Load: 40.0 t ADT: 219

LOCAL

Good

Over: SMALL

094453402, Sioux, IA

Built 2009 Load: 40.0 t ADT: 11

K 52 (IBEX AVE)

Good

Over: CREEK

095452502, Sioux, IA

Built 2013 Load: 40.0 t ADT: 150

FM

Good

Over: SIX MILE CREEK

094482402, Sioux, IA

Built 1971 Load: 40.2 t ADT: 379

290TH ST

Good

Over: STREAM

1675 east of Dogwood, Sioux, IA

Built 2015 Load: 40.5 t ADT: 50

FM

Good

Over: DRY CREEK

096461202, Sioux, IA

Built 2010 Load: 40.8 t ADT: 957

FM

Good

Over: NO NAME CREEK

097480804, Sioux, IA

Built 1966 Load: 41.1 t ADT: 789

LOCAL

Good

Over: SIX MILE CREEK

094482401, Sioux, IA

Built 1997 Load: 41.7 t ADT: 40

395TH ST

Good

Over: FLOYD RIVER

095430309, Sioux, IA

Built 2021 Load: 42.1 t ADT: 60

IA 60 SB

Good

Over: FLOYD RIVER

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

Built 2002 Load: 42.1 t ADT: 2,035

A54B

Good

Over: NO NAME CREEK

097481301, Sioux, IA

Built 2021 Load: 43.4 t ADT: 609

US 75

Good

Over: BURR OAK CREEK

3.1 mi N of N jct US 18, Sioux, IA

Built 2011 Load: 44.7 t ADT: 2,610

LOCAL

Good

Over: FLOYD RIVER

095431601, Sioux, IA

Built 2001 Load: 44.7 t ADT: 26

LOCAL

Good

Over: SMALL

095451004, Sioux, IA

Built 2004 Load: 45.0 t ADT: 2,324

B 58 (470TH ST)

Good

Over: SIX MILE CREEK

094481301, Sioux, IA

Built 2012 Load: 45.3 t ADT: 40

K30 EAGLE AVE

Good

Over: INDIAN CREEK

094460802, Sioux, IA

Built 2006 Load: 45.4 t ADT: 1,555

FM

Good

Over: BARNES CREEK

094432402, Sioux, IA

Built 1993 Load: 45.4 t ADT: 345

FM

Good

Over: STREAM

094440902, Sioux, IA

Built 1998 Load: 45.4 t ADT: 2,930

LOCAL

Good

Over: ORANGE CITY SLOUGH

094452201, Sioux, IA

Built 1996 Load: 45.4 t ADT: 40

FM

Good

Over: CREEK

094453401, Sioux, IA

Built 2007 Load: 45.4 t ADT: 50

LOCAL

Good

Over: SMALL STREAM

095450201, Sioux, IA

Built 1994 Load: 45.4 t ADT: 40

FM

Good

Over: CREEK

095452001, Sioux, IA

Built 1999 Load: 45.4 t ADT: 1,236

FM

Good

Over: CREEK

095462902, Sioux, IA

Built 2003 Load: 45.4 t ADT: 957

MARSH AVE

Good

Over: NO NAME CREEK

096430102, Sioux, IA

Built 2000 Load: 45.4 t ADT: 30

LOCAL

Good

Over: SMALL STREAM

096441002, Sioux, IA

Built 2007 Load: 45.4 t ADT: 30

FM

Good

Over: STREAM

097430801, Sioux, IA

Built 1995 Load: 45.4 t ADT: 619

LOCAL

Good

Over: SMALL STREAM

094451201, Sioux, IA

Built 2001 Load: 45.7 t ADT: 40

LOCAL

Good

Over: SMALL STREAM

095441702, Sioux, IA

Built 1992 Load: 45.7 t ADT: 60

LOCAL

Good

Over: SMALL STREAM

095443202, Sioux, IA

Built 1989 Load: 45.7 t ADT: 549

LOCAL

Good

Over: SMALL STREAM

096440302, Sioux, IA

Built 1999 Load: 45.7 t ADT: 30

B 30 370TH ST

Good

Over: NO NAME CREEK

096452701, Sioux, IA

Built 2018 Load: 45.7 t ADT: 988

LOCAL

Good

Over: SMALL STREAM

097462604, Sioux, IA

Built 1990 Load: 45.7 t ADT: 50

K24 DOGWOOD AVE

Good

Over: NO NAME CREEK

097473604, Sioux, IA

Built 2017 Load: 45.7 t ADT: 429

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