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:

A AVE

Over: STREAM

094061906, Clayton, IA

Built 1900 Load: 5.5 t ADT: 15

HOME ENT (SDB)

Over: PANTHER CREEK

091012903, Clayton, IA

Built 1920 Load: 8.1 t ADT: 10

EGRET RD

Over: STREAM

093052804, Clayton, IA

Built 1940 Load: 10.0 t ADT: 79

ECHO AVE

Over: STREAM

091050306, Clayton, IA

Built 1920 Load: 10.4 t ADT: 11

DOVE AVE

Over: ROBERTS CREEK

094050806, Clayton, IA

Built 1964 Load: 10.4 t ADT: 11

260TH ST

Over: SCHNEIDERS CREEK

093052803, Clayton, IA

Built 1915 Load: 10.7 t ADT: 41

GRANDVIEW RD

Over: VOLGA RIVER

092042605, Clayton, IA

Built 1960 Load: 11.3 t ADT: 491

CABLE AVE

Over: TURKEY RIVER

094062608, Clayton, IA

Built 1953 Load: 11.3 t ADT: 69

BUCK CREEK RD

Over: BUCK CREEK

093032205, Clayton, IA

Built 1954 Load: 11.7 t ADT: 39

270TH ST

Over: SM STREAM

093053405, Clayton, IA

Built 1920 Load: 11.7 t ADT: 11

HARVEST RD

Over: STREAM

091041006, Clayton, IA

Built 1920 Load: 13.6 t ADT: 21

KENNEDY RD

Over: STREAM

092031603, Clayton, IA

Built 1955 Load: 14.3 t ADT: 62

SPOOK CAVE RD

Over: SM STREAM

095041604, Clayton, IA

Built 1954 Load: 14.3 t ADT: 91

JIGSAW RD

Over: CEDAR CREEK

093033103, Clayton, IA

Built 1925 Load: 14.6 t ADT: 21

COFFEE RD

Over: PLUM CREEK

091013403, Clayton, IA

Built 1900 Load: 15.2 t ADT: 49

JASMINE RD

Over: CEDAR CREEK

092030603, Clayton, IA

Built 1953 Load: 15.2 t ADT: 15

KENNEDY RD

Over: CEDAR CREEK

092030703, Clayton, IA

Built 1955 Load: 15.2 t ADT: 34

KENNEDY RD

Over: STREAM

092030703, Clayton, IA

Built 1955 Load: 15.2 t ADT: 34

145TH ST

Over: ROBERTS CREEK

095062605, Clayton, IA

Built 1953 Load: 15.5 t ADT: 59

JUPITER RD

Over: WAYMAN CREEK

092043618, Clayton, IA

Built 1951 Load: 15.6 t ADT: 246

CHARIOT RD

Over: STREAM

094062705, Clayton, IA

Built 1954 Load: 15.6 t ADT: 34

290TH ST

Over: COON CREEK

092050701, Clayton, IA

Built 1920 Load: 15.9 t ADT: 82

IOWA AVE

Over: STREAM

091042604, Clayton, IA

Built 1940 Load: 17.0 t ADT: 79

FANTAIL RD

Over: STREAM

091050106, Clayton, IA

Built 1925 Load: 17.0 t ADT: 15

OSTERDOCK RD

Over: JOLES CREEK

092033606, Clayton, IA

Built 1942 Load: 17.0 t ADT: 412

HAZEL RD

Over: STREAM

092042604, Clayton, IA

Built 1954 Load: 17.0 t ADT: 30

FORT RD

Over: STREAM

092052703, Clayton, IA

Built 1931 Load: 17.0 t ADT: 39

BUSH RD

Over: WILLOW CREEK

092060504, Clayton, IA

Built 1948 Load: 17.0 t ADT: 15

HARBER RD

Over: STREAM

093042102, Clayton, IA

Built 1954 Load: 17.0 t ADT: 29

CHARIOT RD

Over: STREAM

093050506, Clayton, IA

Built 1957 Load: 17.0 t ADT: 34

APPLE RD

Over: STREAM

094060404, Clayton, IA

Built 1949 Load: 17.0 t ADT: 403

CHARIOT RD

Over: SM STREAM

094061907, Clayton, IA

Built 1953 Load: 17.0 t ADT: 73

ABBEY RD

Over: STREAM

094062906, Clayton, IA

Built 1955 Load: 17.0 t ADT: 25

DOGWOOD AVE

Over: SILVER CREEK

095053002, Clayton, IA

Built 1930 Load: 17.0 t ADT: 98

ASPEN AVE

Over: ROBERTS CREEK

095060804, Clayton, IA

Built 1957 Load: 17.0 t ADT: 157

CONCORD AVE

Over: STREAM

095063504, Clayton, IA

Built 1948 Load: 17.0 t ADT: 47

HORSESHOE RD

Over: ELK CREEK

091042607, Clayton, IA

Built 1939 Load: 18.0 t ADT: 79

NICKEL RD

Over: LITTLE TURKEY

091021604, Clayton, IA

Built 1935 Load: 18.1 t ADT: 62

BIGHORN RD

Over: HEWETT CREEK

092062204, Clayton, IA

Built 1920 Load: 18.1 t ADT: 51

390TH ST

Over: MAQUOKETA RIVER

091063103, Clayton, IA

Built 1958 Load: 18.5 t ADT: 108

KENNEDY RD

Over: SM STREAM

092030807, Clayton, IA

Built 1955 Load: 18.5 t ADT: 34

GRAPE RD

Over: DRY MILL CR

093043003, Clayton, IA

Built 1959 Load: 18.5 t ADT: 69

145TH ST

Over: STREAM

095052805, Clayton, IA

Built 1925 Load: 18.8 t ADT: 137

HERON AVE

Over: DRY MILL CREEK

093040406, Clayton, IA

Built 1960 Load: 21.1 t ADT: 82

GLACIER RD

Over: DOE CR

092043106, Clayton, IA

Built 1958 Load: 22.0 t ADT: 108

US 18 & 52

Over: BRANCH ROBERTS CREEK

0.3 MI. W OF JCT. SR W64, Clayton, IA

Built 1967 Load: 22.2 t ADT: 4,140

GRAPE RD

Over: ROBERT CREEK

093052504, Clayton, IA

Built 1946 Load: 22.4 t ADT: 196

BEAR RD

Over: ENSIGN HOLLOW

092062806, Clayton, IA

Built 1976 Load: 22.5 t ADT: 39

220TH ST

Over: BUCK CREEK

093030503, Clayton, IA

Built 1978 Load: 22.5 t ADT: 15

232ND ST

Over: BUCK CREEK

093030903, Clayton, IA

Built 1973 Load: 22.5 t ADT: 113

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