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)

Sort:

290TH ST

Over: STONEY CREEK

097381401, Clay, IA

Built 2004 Load: 33.2 t ADT: 15

300TH AVE

Over: STREAM

096352102, Clay, IA

Built 1999 Load: 33.7 t ADT: 46

370TH AVE

Over: STREAM

096382501, Clay, IA

Built 2000 Load: 33.8 t ADT: 30

455TH ST

Over: MONTGOMERY CREEK

094360203, Clay, IA

Built 2002 Load: 34.0 t ADT: 62

FM 320TH AVE

Over: DD #22

094352602, Clay, IA

Built 2003 Load: 34.6 t ADT: 20

300TH AVE

Over: STREAM

097353302, Clay, IA

Built 2000 Load: 34.7 t ADT: 11

RAILWAY ST

Over: ELK CREEK

000000000, Clay, IA

Built 1996 Load: 34.7 t ADT: 884

FM 170TH AVE

Over: WILLOW CREEK

095373202, Clay, IA

Built 1963 Load: 35.0 t ADT: 219

FM 260TH AVE

Over: MONTGOMERY CREEK

094360202, Clay, IA

Built 1978 Load: 35.3 t ADT: 71

280TH ST

Over: STREAM

097351001, Clay, IA

Built 2000 Load: 35.6 t ADT: 60

250TH AVE

Over: PRAIRIE CREEK

096362702, Clay, IA

Built 1990 Load: 35.9 t ADT: 62

330TH AVE

Over: D.D#60

00000, Clay, IA

Built 2011 Load: 36.0 t ADT: 15

FM 290TH AVE

Over: PICKERAL RUN #37

097353202, Clay, IA

Built 1995 Load: 36.0 t ADT: 50

290TH ST

Over: LITTLE SIOUX RIVER

097371701, Clay, IA

Built 1978 Load: 36.0 t ADT: 30

460TH ST

Over: STREAM

094371203, Clay, IA

Built 1994 Load: 37.3 t ADT: 41

FM 390TH ST

Over: LITTLE SIOUX RIVER

095360201, Clay, IA

Built 1986 Load: 37.6 t ADT: 40

350TH ST

Over: LITTLE SIOUX RIVER

096371405, Clay, IA

Built 1976 Load: 37.6 t ADT: 2,584

FM 350TH ST

Over: OCHEYEDAN RIVER

096371803, Clay, IA

Built 1973 Load: 38.6 t ADT: 1,806

FM 240TH AVE

Over: DRAINAGE DITCH #28

097363304, Clay, IA

Built 1987 Load: 41.3 t ADT: 1,228

FM 200TH AVE

Over: WILLOW CREEK

094371102, Clay, IA

Built 1989 Load: 50.0 t ADT: 45

340TH ST

Over: STONY CREEK

096370703, Clay, IA

Built 2003 Load: 52.9 t ADT: 185

330TH ST

Over: STREAM

096380601, Clay, IA

Built 2005 Load: 52.9 t ADT: 72

110TH AVE

Over: HENRY CREEK

094380802, Clay, IA

Built 1965 Load: 95.9 t ADT: 26

250TH AVE

Over: LITTLE MUDDY CREEK

097361502, Clay, IA

Built 1996 Load: 97.2 t ADT: 72

FM 320TH ST

Over: DD #28

097363201, Clay, IA

Built 1996 Load: 97.2 t ADT: 1,228

SR M22

Over: SIDE DITCH

At jct. SR M-22, Clay, IA

Built 1959 Load: 18.1 t ADT: 10

PK 658(WANATA)

Over: LITTLE SIOUX RIVER

IN WANATA STATE PARK, Clay, IA

Built 1972 Load: 19.8 t ADT: 58

200TH AVE

Over: PRAIRIE CREEK

096373502, Clay, IA

Built 2003 Load: 26.8 t ADT: 11

390TH ST

Over: PRAIRIE CREEK

095370401, Clay, IA

Built 2008 Load: 27.7 t ADT: 50

160TH AVE

Over: SPRING CREEK

096370702, Clay, IA

Built 1981 Load: 29.7 t ADT: 40

FM 430TH ST

Over: ELK CREEK

095353001, Clay, IA

Built 2004 Load: 30.3 t ADT: 240

340TH ST

Over: LITTLE MEADOW CREEK

096360905, Clay, IA

Built 1981 Load: 30.3 t ADT: 103

140TH AVE

Over: STONY CREEK

097381102, Clay, IA

Built 1978 Load: 30.4 t ADT: 46

FM 240TH AVE

Over: LITTLE MUDDY CREEK

097363208, Clay, IA

Built 1987 Load: 31.2 t ADT: 240

US 18

Over: OCHEYEDAN RIVER

2.3 mi W of SR M-27, Clay, IA

Built 2014 Load: 32.4 t ADT: 2,990

US 71

Over: PRAIRIE CREEK

1.4 MI. N OF JCT. SR B40, Clay, IA

Built 2017 Load: 32.4 t ADT: 4,770

420TH ST

Over: STREAM

095362201, Clay, IA

Built 2005 Load: 32.4 t ADT: 46

495TH ST

Over: LITTLE SIOUX RIVER

094362803, Clay, IA

Built 2005 Load: 32.7 t ADT: 30

FM 170TH AVE

Over: SMALL WATERWAY

094370802, Clay, IA

Built 1993 Load: 32.7 t ADT: 219

FM 240TH AVE

Over: LITTLE SIOUX RIVER

096361608, Clay, IA

Built 1991 Load: 32.7 t ADT: 2,623

390TH ST

Over: WILLOW CREEK

095380601, Clay, IA

Built 2008 Load: 32.9 t ADT: 5

330TH ST

Over: LITTLE MEADOW CREEK

096360403, Clay, IA

Built 1975 Load: 32.9 t ADT: 103

120TH AVE

Over: WILLOW CREEK

00000, Clay, IA

Built 2011 Load: 33.0 t ADT: 11

400TH ST

Over: WILLOW CREEK

95381701, Clay, IA

Built 2011 Load: 33.0 t ADT: 11

460TH ST

Over: STREAM

094370801, Clay, IA

Built 2005 Load: 33.7 t ADT: 21

390TH ST

Over: PRARIE CREEK

095370201, Clay, IA

Built 2006 Load: 33.7 t ADT: 21

370TH ST

Over: STREAM

096352701, Clay, IA

Built 1998 Load: 33.7 t ADT: 41

150TH AVE

Over: STREAM

096382402, Clay, IA

Built 2000 Load: 33.8 t ADT: 62

100TH AVE

Over: WILLOW CREEK

096383102, Clay, IA

Built 1996 Load: 34.6 t ADT: 35

FM 190TH AVE

Over: OCHEYEDAN RIVER

096371502, Clay, IA

Built 2002 Load: 35.3 t ADT: 1,277

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

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Compiled by PlainBridges, Independent data publisher

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.