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:

450TH ST

Over: STREAM

094370501, Clay, IA

Built 1949 Load: 20.7 t ADT: 15

140TH AVE

Over: OCHEYEDAN RIVER

096381102, Clay, IA

Built 1963 Load: 21.7 t ADT: 153

390TH ST

Over: OVERFLOW LITTLE SIOUX R

095360201, Clay, IA

Built 1955 Load: 22.7 t ADT: 40

420TH ST

Over: ELK CREEK

095352001, Clay, IA

Built 1978 Load: 23.0 t ADT: 11

330TH ST

Over: STONY CREEK

096370603, Clay, IA

Built 1965 Load: 23.7 t ADT: 41

FM 350TH ST

Over: BIG MEADOW CREEK

096361501, Clay, IA

Built 1963 Load: 24.9 t ADT: 878

FM 300TH ST

Over: DRAINAGE DITCH

097352201, Clay, IA

Built 1963 Load: 25.2 t ADT: 469

FM 130TH AVE

Over: WILLOW CREEK

095381502, Clay, IA

Built 1964 Load: 26.0 t ADT: 619

FM 190TH AVE

Over: PRAIRIE CREEK

096373402, Clay, IA

Built 1964 Load: 26.6 t ADT: 818

FM 310TH AVE

Over: L TRUMBULL OUTLET

097352702, Clay, IA

Built 1970 Load: 26.6 t ADT: 968

FM 270TH AVE

Over: MEADOW CREEK

097361302, Clay, IA

Built 1968 Load: 26.6 t ADT: 50

US 18

Over: LITTLE SIOUX OVERFLOW

3.6 mi. E of E jct. US 71, Clay, IA

Built 1931 Load: 27.7 t ADT: 4,170

180TH AVE

Over: PRAIRIE CREEK

095370402, Clay, IA

Built 2008 Load: 27.7 t ADT: 21

FM 260TH AVE

Over: LITTLE SIOUX RIVER

095363502, Clay, IA

Built 1969 Load: 27.9 t ADT: 71

190TH AVE

Over: WILLOW CREEK

094370302, Clay, IA

Built 1978 Load: 28.6 t ADT: 72

470TH ST

Over: MONTGOMERY CREEK

094361403, Clay, IA

Built 1998 Load: 29.5 t ADT: 30

225TH ST

Over: WILLOW CREEK

094360704, Clay, IA

Built 1978 Load: 29.7 t ADT: 26

FM 150TH AVE

Over: WILLOW CREEK

095382502, Clay, IA

Built 1973 Load: 29.7 t ADT: 180

270TH ST

Over: STONY CREEK

097380301, Clay, IA

Built 1976 Load: 29.7 t ADT: 26

FM 160TH AVE

Over: OCHEYEDAN RIVER

096370702, Clay, IA

Built 1981 Load: 30.2 t ADT: 40

FM 260TH AVE

Over: OVERFLOW LITTLE SIOUX

094360202, Clay, IA

Built 1966 Load: 30.3 t ADT: 71

180TH AVE

Over: WILLOW CREEK

094370402, Clay, IA

Built 1979 Load: 30.4 t ADT: 50

FM 100TH AVE

Over: BR OCHEYEDAN R

096380602, Clay, IA

Built 1967 Load: 30.4 t ADT: 359

270TH ST

Over: BIG MEADOW CK

097350601, Clay, IA

Built 1976 Load: 30.4 t ADT: 20

340TH ST

Over: BIG MEADOW CREEK

096361001, Clay, IA

Built 1981 Load: 30.6 t ADT: 105

230TH AVE

Over: DD #28

097362902, Clay, IA

Built 1979 Load: 30.6 t ADT: 123

350TH ST

Over: OVERFLOW MEADOW CREEK

096361501, Clay, IA

Built 1976 Load: 31.1 t ADT: 878

FM 300TH ST

Over: LITTLE MEADOW CK

097362101, Clay, IA

Built 1989 Load: 31.1 t ADT: 369

310TH ST

Over: LITTLE MUDDY CREEK

097362801, Clay, IA

Built 1991 Load: 31.1 t ADT: 21

420TH ST

Over: WILLOW CREEK

095382201, Clay, IA

Built 1978 Load: 32.3 t ADT: 11

290TH AVE

Over: STREAM

096352002, Clay, IA

Built 1994 Load: 32.3 t ADT: 103

380TH ST

Over: PRAIRIE CK

096363301, Clay, IA

Built 1977 Load: 32.3 t ADT: 30

330TH ST

Over: STREAM

096380201, Clay, IA

Built 1900 Load: 32.3 t ADT: 123

FM 350TH ST

Over: DRAINAGE

096381701, Clay, IA

Built 1972 Load: 32.3 t ADT: 908

FM 100TH AVE

Over: STREAM

096381802, Clay, IA

Built 1972 Load: 32.3 t ADT: 529

310TH ST

Over: MEADOW CREEK

097362601, Clay, IA

Built 1999 Load: 32.4 t ADT: 30

240TH AVE

Over: LITTLE MEADOWS

097362802, Clay, IA

Built 1999 Load: 32.4 t ADT: 123

FM 280TH ST

Over: STONEY CREEK

097381001, Clay, IA

Built 1965 Load: 32.4 t ADT: 270

490TH ST

Over: MONTGOMERY CREEK

094353001, Clay, IA

Built 1990 Load: 32.7 t ADT: 46

190TH AVE

Over: STREAM

094371002, Clay, IA

Built 1999 Load: 32.7 t ADT: 46

225TH AVE

Over: SMALL STREAM

095360604, Clay, IA

Built 1978 Load: 32.7 t ADT: 81

FM 440TH ST

Over: SMALL

095373201, Clay, IA

Built 1988 Load: 32.7 t ADT: 469

FM 400TH ST

Over: WILLOW CREEK

095380801, Clay, IA

Built 1968 Load: 32.7 t ADT: 797

370TH ST

Over: STREAM

096352601, Clay, IA

Built 2001 Load: 32.7 t ADT: 47

US 71

Over: BR OF LITTLE MEADOW CRK

0.8 mi. N of N jct. US 18, Clay, IA

Built 1990 Load: 32.7 t ADT: 11,400

FM 320TH ST

Over: BIG MEADOW CREEK

097363501, Clay, IA

Built 1978 Load: 32.9 t ADT: 80

FM 280TH AVE

Over: PICKEREL RUN

096351704, Clay, IA

Built 1990 Load: 33.0 t ADT: 120

FM 280TH ST

Over: BIG MEADOW CREEK

097350701, Clay, IA

Built 1977 Load: 33.0 t ADT: 50

FM 320TH ST

Over: DRAINAGE DIST #37 DITCH

097353301, Clay, IA

Built 1978 Load: 33.0 t ADT: 34

FM 280TH ST

Over: LITTLE SIOUX RIVER

097370701, Clay, IA

Built 1966 Load: 33.0 t ADT: 270

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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