Clay County, IA

138 public highway bridges

Clay County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clay County, Iowa contains 138 public highway bridges. Roughly 35.5% are rated “Good,” 54.3% “Fair,” and 10.1% “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.

138
Total Bridges
35.5%
Good
54.3%
Fair
10.1%
Poor Condition

Condition Distribution

Good
35.5% (49)
Fair
54.3% (75)
Poor
10.1% (14)

All Bridges (138)

290TH ST

Good

Over: MEADOW CREEK

097361301, Clay, IA

Built 2002 Load: 36.3 t ADT: 35

400TH ST

Good

Over: STREAM

095361101, Clay, IA

Built 2014 Load: 36.6 t ADT: 5

300TH ST

Good

Over: LITTLE SIOUX RIVER

097372001, Clay, IA

Built 1996 Load: 37.2 t ADT: 11

345TH ST

Good

Over: STREAM

096381203, Clay, IA

Built 2002 Load: 37.3 t ADT: 15

320TH AVE

Good

Over: STREAM

097351102, Clay, IA

Built 2007 Load: 37.6 t ADT: 21

FM 190TH AVE

Good

Over: LITTLE SIOUX RIVER

097372702, Clay, IA

Built 1992 Load: 37.6 t ADT: 50

N18 340TH AVE

Good

Over: LOST ISLAND LAKE

096350105, Clay, IA

Built 2021 Load: 37.9 t ADT: 838

FM 440TH ST

Good

Over: WILLOW CREEK

095373101, Clay, IA

Built 2009 Load: 38.6 t ADT: 399

150TH AVE

Good

Over: STONEY CREEK

097381302, Clay, IA

Built 1994 Load: 38.6 t ADT: 81

FM 160TH AVE

Good

Over: STONY CREEK

097373002, Clay, IA

Built 1990 Load: 38.8 t ADT: 34

N18 330TH AVE

Good

Over: POOL-MUD LAKE

097352502, Clay, IA

Built 2018 Load: 38.9 t ADT: 350

310TH ST

Good

Over: LITTLE SIOUX RIVER

097372802, Clay, IA

Built 1986 Load: 39.2 t ADT: 81

310TH ST

Good

Over: STONY CREEK

097382501, Clay, IA

Built 2020 Load: 39.5 t ADT: 26

1ST ST SOUTH

Good

Over: PICKERAL RUN

86351803, Clay, IA

Built 2021 Load: 39.5 t ADT: 171

300TH ST

Good

Over: STONEY CREEK

097382401, Clay, IA

Built 2005 Load: 39.9 t ADT: 26

430TH ST

Good

Over: WILLOW CREEK

095382601, Clay, IA

Built 2020 Load: 41.1 t ADT: 15

340TH ST

Good

Over: OCHEYEDAN RIVER

096380505, Clay, IA

Built 2008 Load: 41.8 t ADT: 30

300TH ST

Good

Over: OCHEYDAN RIVER

097381901, Clay, IA

Built 2015 Load: 42.1 t ADT: 21

330TH ST

Good

Over: BIG MEADOW CREEK

096360301, Clay, IA

Built 1990 Load: 45.4 t ADT: 81

LOCAL RD

Good

Over: SMALL

097362102, Clay, IA

Built 2003 Load: 45.4 t ADT: 112

270TH AVE

Good

Over: MONTGOMERY CREEK

094361302, Clay, IA

Built 1993 Load: 45.7 t ADT: 26

340TH ST

Good

Over: PICKEREL RUN

096350701, Clay, IA

Built 1991 Load: 45.7 t ADT: 46

260TH AVE

Good

Over: BIG MEADOW CREEK

097363502, Clay, IA

Built 2000 Load: 45.7 t ADT: 30

200 AVE

Good

Over: OCHEYEDAN RIVER

096371502, Clay, IA

Built 2012 Load: 46.3 t ADT: 2,273

280TH AVE

Poor

Over: ELK CREEK

095353004, Clay, IA

Built 1917 ADT: 11

210TH AVE

Poor

Over: LITTLE SIOUX RIVER

096370102, Clay, IA

Built 1915 ADT: 62

470TH ST

Poor

Over: LITTLE SIOUX RIVER

094360906, Clay, IA

Built 1907 Load: 5.6 t ADT: 26

355TH ST

Poor

Over: LITTLE SIOUX RIVER

096371106, Clay, IA

Built 1905 Load: 6.5 t ADT: 41

290TH ST

Poor

Over: STREAM

097351505, Clay, IA

Built 1913 Load: 15.6 t ADT: 5

110TH AVE

Poor

Over: WILLOW CREEK

095380502, Clay, IA

Built 1928 Load: 24.6 t ADT: 30

105TH AVE

Poor

Over: HENRY CREEK

094381804, Clay, IA

Built 1965 Load: 24.7 t ADT: 41

FM 310TH AVE

Poor

Over: DITCH NO.60

096352202, Clay, IA

Built 1967 Load: 26.6 t ADT: 259

FM 350TH ST

Poor

Over: SPRING CREEK

096381403, Clay, IA

Built 1963 Load: 26.6 t ADT: 1,806

FM 300TH ST

Poor

Over: BIG MUDDY CREEK

097362301, Clay, IA

Built 1963 Load: 29.7 t ADT: 369

FM 130TH AVE

Poor

Over: OCHEYEDAN RIVER

096381002, Clay, IA

Built 1971 Load: 31.8 t ADT: 1,287

FM 160TH AVE

Poor

Over: WILLOW CREEK

095373002, Clay, IA

Built 1962 Load: 32.1 t ADT: 190

FM 340TH ST

Poor

Over: LITTLE SIOUX RIVER

096371103, Clay, IA

Built 1963 Load: 33.7 t ADT: 2,573

FM 280TH AVE

Poor

Over: PICKERAL RUN

096351902, Clay, IA

Built 1993 Load: 52.9 t ADT: 459

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
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.