Sioux County, IA

429 public highway bridges

Sioux County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Sioux County, Iowa contains 429 public highway bridges. Roughly 61.5% are rated “Good,” 34% “Fair,” and 2.3% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

429
Total Bridges
61.5%
Good
34%
Fair
2.3%
Poor Condition

Condition Distribution

Good
61.5% (264)
Fair
34% (146)
Poor
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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.