Audubon County, IA

161 public highway bridges

Audubon County Bridge Snapshot

Audubon County, Iowa contains 161 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.9% are rated “Good,” 46.6% “Fair,” 20.5% “Poor,” and 20.5% 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.

161
Total Bridges
32.9%
Good
20.5%
Poor
20.5%
Structurally Deficient

Condition Distribution

Good
32.9% (53)
Fair
46.6% (75)
Poor
20.5% (33)
SD
20.5% (33)

All Bridges (161)

LOCAL

Fair

Over: INDIAN CREEK

079361402, Audubon, IA

Built 1958 Load: 7.3 t ADT: 11

LOCAL

Fair

Over: TROUBLESOME CREEK

078340404, Audubon, IA

Built 1925 Load: 9.5 t ADT: 46

LOCAL

Fair

Over: TROUBLESOME CREEK

078351305, Audubon, IA

Built 1959 Load: 12.1 t ADT: 21

LOCAL

Fair

Over: CREEK

079340805, Audubon, IA

Built 1900 Load: 12.9 t ADT: 11

LOCAL

Fair

Over: E NISHNABOTNA RIVER

079350201, Audubon, IA

Built 1924 Load: 13.0 t ADT: 15

270TH ST

Fair

Over: CREEK

079353101, Audubon, IA

Built 1957 Load: 13.5 t ADT: 20

LOCAL

Fair

Over: UNNAMED CREEK

080360705, Audubon, IA

Built 1967 Load: 13.5 t ADT: 15

LOCAL

Fair

Over: CREEK

078361704, Audubon, IA

Built 1950 Load: 15.6 t ADT: 21

COUNTY RD

Fair

Over: CROOKED CREEK

FM 078342402, Audubon, IA

Built 1955 Load: 16.0 t ADT: 15

FM

Fair

Over: CREEK

079343102, Audubon, IA

Built 1959 Load: 16.6 t ADT: 34

LOCAL

Fair

Over: E NISHNABOTNA RIVER

078363605, Audubon, IA

Built 1984 Load: 16.9 t ADT: 30

FM F-32

Fair

Over: CREEK

080360807, Audubon, IA

Built 1965 Load: 16.9 t ADT: 110

LOCAL

Fair

Over: CREEK

081350103, Audubon, IA

Built 1939 Load: 17.0 t ADT: 11

LOCAL

Fair

Over: CREEK

078363202, Audubon, IA

Built 1973 Load: 17.1 t ADT: 62

FM

Fair

Over: BR ELKHORN CREEK

079353102, Audubon, IA

Built 1967 Load: 17.9 t ADT: 15

SWIFT AVE

Fair

Over: CREEK

078340204, Audubon, IA

Built 1945 Load: 18.0 t ADT: 35

FM

Fair

Over: BR NISHNABOTNA RIVER

079352701, Audubon, IA

Built 1963 Load: 18.0 t ADT: 34

LOCAL

Fair

Over: STREAM

081351301, Audubon, IA

Built 1941 Load: 18.0 t ADT: 40

FM

Fair

Over: NISHNABOTNA

078351905, Audubon, IA

Built 1959 Load: 18.1 t ADT: 170

FM M-66

Fair

Over: CREEK

080360808, Audubon, IA

Built 1958 Load: 18.1 t ADT: 338

FM

Fair

Over: NISHNABOTNA RIVER

078350409, Audubon, IA

Built 1958 Load: 18.1 t ADT: 597

LOCAL

Fair

Over: CREEK

079340303, Audubon, IA

Built 1933 Load: 19.0 t ADT: 15

LOCAL

Fair

Over: BUCK CREEK

078362801, Audubon, IA

Built 1975 Load: 19.3 t ADT: 15

LOCAL

Fair

Over: E NISHNABOTNA RIVER

081350202, Audubon, IA

Built 1940 Load: 19.3 t ADT: 40

LOCAL

Fair

Over: CREEK

081341002, Audubon, IA

Built 1949 Load: 20.7 t ADT: 21

LOCAL

Fair

Over: CREEK

080362104, Audubon, IA

Built 1928 Load: 20.8 t ADT: 15

LOCAL

Fair

Over: CROOKED CREEK

078343502, Audubon, IA

Built 1900 Load: 20.9 t ADT: 5

LOCAL

Fair

Over: CREEK

080362401, Audubon, IA

Built 1936 Load: 21.5 t ADT: 91

JAY AVE

Fair

Over: CREEK

078351601, Audubon, IA

Built 1925 Load: 21.9 t ADT: 35

LOCAL

Fair

Over: CREEK

079343204, Audubon, IA

Built 1939 Load: 22.0 t ADT: 15

LOCAL

Fair

Over: TRIB OF TROUBLESOME CRK

078340505, Audubon, IA

Built 1980 Load: 22.4 t ADT: 41

LOCAL

Fair

Over: BUCK CREEK

078363201, Audubon, IA

Built 1974 Load: 22.5 t ADT: 30

FM

Fair

Over: CREEK

080361302, Audubon, IA

Built 1930 Load: 22.5 t ADT: 71

LOCAL

Fair

Over: CREEK

080341401, Audubon, IA

Built 1933 Load: 24.9 t ADT: 11

FM

Fair

Over: CREEK

080340502, Audubon, IA

Built 1963 Load: 25.3 t ADT: 26

LOCAL

Fair

Over: E NISHNABOTNA RIVER

081341901, Audubon, IA

Built 1971 Load: 25.3 t ADT: 5

FM

Fair

Over: BLUE GRASS CREEK

080351601, Audubon, IA

Built 1962 Load: 26.0 t ADT: 210

LOCAL

Fair

Over: PLEASANT RUN

078353602, Audubon, IA

Built 1973 Load: 26.4 t ADT: 11

FM

Fair

Over: NISHNABOTNA RIVER (EF)

080361503, Audubon, IA

Built 1963 Load: 26.5 t ADT: 110

LOCAL

Fair

Over: CREEK

080360703, Audubon, IA

Built 1938 Load: 26.6 t ADT: 30

LOCAL

Fair

Over: CREEK

078341602, Audubon, IA

Built 1977 Load: 26.8 t ADT: 51

FM

Fair

Over: CREEK

080343501, Audubon, IA

Built 1936 Load: 26.9 t ADT: 11

FM

Fair

Over: CREEK

081342402, Audubon, IA

Built 1932 Load: 26.9 t ADT: 5

FM F-65

Fair

Over: CROOKED CREEK

078343301, Audubon, IA

Built 1936 Load: 27.2 t ADT: 60

LOCAL

Fair

Over: CREEK

079360201, Audubon, IA

Built 1931 Load: 28.5 t ADT: 21

LOCAL

Fair

Over: CREEK

081341702, Audubon, IA

Built 1987 Load: 28.6 t ADT: 46

N DIVISION ST

Fair

Over: BLUE GRASS CREEK

Fairgrounds, Audubon, IA

Built 1933 Load: 28.7 t

FM

Fair

Over: CREEK

078340301, Audubon, IA

Built 1945 Load: 28.8 t ADT: 45

LOCAL

Fair

Over: CREEK

078360504, Audubon, IA

Built 1939 Load: 29.2 t ADT: 30

FM

Fair

Over: CREEK

078343004, Audubon, IA

Built 1920 Load: 29.3 t ADT: 60

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