Clayton County, IA

214 public highway bridges

Clayton County Bridge Snapshot

Clayton County, Iowa contains 214 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.2% are rated “Good,” 57.9% “Fair,” 9.8% “Poor,” and 9.8% 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.

214

Total Bridges

32.2%

Good

9.8%

Poor

9.8%

Structurally Deficient

Condition Distribution

Good

32.2% (69)

Fair

57.9% (124)

Poor

9.8% (21)

SD

9.8% (21)

All Bridges (214)

Sort:

172ND ST

Over: SMALL STREAM

094050700, Clayton, IA

Built 2016 Load: 22.5 t ADT: 26

ECHO AVE

Over: HONEY CREEK

091050406, Clayton, IA

Built 1951 Load: 22.7 t ADT: 39

CHARIOT RD

Over: SM STREAM

093050506, Clayton, IA

Built 1957 Load: 22.7 t ADT: 34

DOLPHIN AVE

Over: SCHNEIDER CREEK

093052004, Clayton, IA

Built 1977 Load: 22.7 t ADT: 10

265TH ST

Over: SMALL STREAM

093052605, Clayton, IA

Built 1977 Load: 22.7 t ADT: 15

AGATE RD

Over: SMALL STREAM

094062103, Clayton, IA

Built 1978 Load: 22.7 t ADT: 295

125TH ST

Over: STREAM

095051603, Clayton, IA

Built 1957 Load: 22.7 t ADT: 73

125TH ST

Over: STREAM

095051605, Clayton, IA

Built 1957 Load: 22.7 t ADT: 82

DOVE AVE

Over: SILVER CREEK

095052902, Clayton, IA

Built 1984 Load: 22.7 t ADT: 41

120TH ST

Over: ROBERTS CREEK

095061601, Clayton, IA

Built 1900 Load: 22.7 t ADT: 98

FARMERSBURG RD

Over: ROBERTS CREEK

094051403, Clayton, IA

Built 1933 Load: 22.8 t ADT: 25

BELGIAM RD

Over: STREAM

091060204, Clayton, IA

Built 1930 Load: 23.3 t ADT: 30

165TH ST

Over: STREAM

094040603, Clayton, IA

Built 1975 Load: 23.7 t ADT: 47

ST SEBALD RD

Over: STREAM

092062303, Clayton, IA

Built 1939 Load: 24.2 t ADT: 39

ESSEX RD

Over: ROBERTS CREEK

094051504, Clayton, IA

Built 1917 Load: 24.3 t ADT: 16

GRANITE AVE

Over: DRY HOLLOW

094041904, Clayton, IA

Built 1950 Load: 24.6 t ADT: 35

LANDAU RD

Over: LITTLE TURKEY

091023005, Clayton, IA

Built 1955 Load: 25.9 t ADT: 62

WAYMAN RD

Over: WAYMAN CREEK

091030707, Clayton, IA

Built 1952 Load: 25.9 t ADT: 10

BIG SPRINGS RD

Over: STREAM

094053007, Clayton, IA

Built 1954 Load: 25.9 t ADT: 47

165TH ST

Over: DEER CR

094060103, Clayton, IA

Built 1957 Load: 25.9 t ADT: 108

160TH ST

Over: DEER CREEK

094060203, Clayton, IA

Built 1956 Load: 25.9 t ADT: 51

CHARIOT RD

Over: STREAM

094062703, Clayton, IA

Built 1954 Load: 25.9 t ADT: 79

CHARIOT RD

Over: SMALL STREAM

094062611, Clayton, IA

Built 1953 Load: 25.9 t ADT: 49

LACE AVE

Over: SM STREAM

093032506, Clayton, IA

Built 1955 Load: 26.2 t ADT: 79

160TH ST

Over: DEER CREEK

094060102, Clayton, IA

Built 1958 Load: 26.2 t ADT: 51

CHARIOT RD

Over: SMALL STREAM

094063510, Clayton, IA

Built 1956 Load: 26.2 t ADT: 49

DIPLOMAT RD

Over: HICKORY CREEK

095050610, Clayton, IA

Built 1953 Load: 26.2 t ADT: 511

DOLPHIN AVE

Over: STREAM

095052004, Clayton, IA

Built 1953 Load: 26.2 t ADT: 88

EAGLE RD

Over: STREAM

095053306, Clayton, IA

Built 1955 Load: 26.2 t ADT: 69

FORESTVILLE RD

Over: STREAM

091063504, Clayton, IA

Built 1949 Load: 26.6 t ADT: 560

165TH ST

Over: ROBERTS CR

094060103, Clayton, IA

Built 1958 Load: 26.6 t ADT: 108

CONCORD AVE

Over: ROBERTS CREEK

095062604, Clayton, IA

Built 1958 Load: 26.6 t ADT: 30

GREAT RIVER RD

Over: LITTLE TURKEY RIVER

091021501, Clayton, IA

Built 1983 Load: 27.3 t ADT: 403

WAYMAN RD

Over: WAYMAN CREEK

091030705, Clayton, IA

Built 1952 Load: 27.5 t ADT: 29

FM BUCK CK RD

Over: STREAM

093033605, Clayton, IA

Built 1954 Load: 27.5 t ADT: 79

LOCAL

Over: SMALL DITCH

000000000, Clayton, IA

Built 1908 Load: 27.9 t ADT: 180

US 18

Over: UNNAMED CREEK

0.1 mi. E of jct. SR B45, Clayton, IA

Built 1988 Load: 28.4 t ADT: 4,730

GREAT RIVER RD

Over: BLUE BELL CREEK

091021303, Clayton, IA

Built 1983 Load: 29.0 t ADT: 403

HICKORY AVE

Over: BLOODY RUN

095042802, Clayton, IA

Built 1920 Load: 29.2 t ADT: 108

ESSEX AVE

Over: STREAM

095050304, Clayton, IA

Built 1910 Load: 29.5 t ADT: 73

MARBLE RD

Over: LITTLE TURKEY RIVER

091021707, Clayton, IA

Built 1979 Load: 29.8 t ADT: 62

HORSESHOE RD

Over: STEELES CREEK

091042605, Clayton, IA

Built 1953 Load: 29.8 t ADT: 59

DOMINO RD

Over: WOLF CREEK

092060205, Clayton, IA

Built 1973 Load: 30.4 t ADT: 619

C-02W

Over: VOLGA RIVER

009000510, Clayton, IA

Built 1975 Load: 30.4 t ADT: 690

GREAT RIVER RD

Over: PANTHER CR

091012604, Clayton, IA

Built 1968 Load: 30.6 t ADT: 344

GRAHAM RD

Over: STREAM

091023008, Clayton, IA

Built 1918 Load: 30.7 t ADT: 62

318TH ST

Over: COX CREEK

092052004, Clayton, IA

Built 1920 Load: 30.7 t ADT: 30

DELTA AVE

Over: STREAM

093051804, Clayton, IA

Built 1905 Load: 30.7 t ADT: 16

FM

Over: HOWARD CREEK

094052406, Clayton, IA

Built 1983 Load: 30.8 t ADT: 344

352ND ST

Over: STREAM

091021003, Clayton, IA

Built 1998 Load: 32.3 t ADT: 41

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026