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)

FM

Fair

Over: CREEK

080361304, Audubon, IA

Built 1936 Load: 29.6 t ADT: 71

LOCAL

Fair

Over: CREEK

081361502, Audubon, IA

Built 1941 Load: 29.7 t ADT: 21

LOCAL

Fair

Over: CREEK

078351604, Audubon, IA

Built 1969 Load: 29.8 t ADT: 15

LOCAL

Fair

Over: E BR W NISHNABOTNA RIVER

081362502, Audubon, IA

Built 1986 Load: 29.8 t ADT: 41

FM

Fair

Over: DRAINAGE DITCH

081363604, Audubon, IA

Built 1969 Load: 31.7 t ADT: 34

FM

Fair

Over: CREEK

080342402, Audubon, IA

Built 1937 Load: 31.8 t ADT: 15

FM

Fair

Over: BLUE GRASS CREEK

080353403, Audubon, IA

Built 1993 Load: 32.7 t ADT: 120

LOCAL

Fair

Over: CREEK

078363101, Audubon, IA

Built 1939 Load: 33.9 t ADT: 30

FM

Fair

Over: CREEK

080343501, Audubon, IA

Built 1936 Load: 34.0 t ADT: 11

LOCAL

Fair

Over: CREEK

081351901, Audubon, IA

Built 1997 Load: 34.1 t ADT: 21

LOCAL

Fair

Over: CREEK

078351607, Audubon, IA

Built 1924 Load: 34.8 t ADT: 15

SIDE ROAD

Fair

Over: DRAINAGE

Fairgrounds, Audubon, IA

Built 1938 Load: 34.8 t

LOCAL

Fair

Over: CREEK

078360603, Audubon, IA

Built 1973 Load: 35.3 t ADT: 51

MOCKINGBIRD AVE

Fair

Over: CREEK

081341802, Audubon, IA

Built 1993 Load: 36.6 t ADT: 11

LOCAL

Fair

Over: CREEK

081351201, Audubon, IA

Built 1929 Load: 38.1 t ADT: 46

LOCAL

Fair

Over: E BR W NISHNABOTNA

080360302, Audubon, IA

Built 1990 Load: 38.2 t ADT: 21

FM

Fair

Over: CREEK

081351302, Audubon, IA

Built 1946 Load: 38.5 t ADT: 40

FM-N-36

Fair

Over: CREEK

079341504, Audubon, IA

Built 1975 Load: 39.0 t ADT: 278

LOCAL

Fair

Over: CREEK

080363003, Audubon, IA

Built 1925 Load: 41.5 t ADT: 30

LOCAL

Fair

Over: CREEK

078342904, Audubon, IA

Built 1940 Load: 43.6 t ADT: 21

FM

Fair

Over: ELKHORN CREEK

078360503, Audubon, IA

Built 1971 Load: 44.7 t ADT: 597

LOCAL

Fair

Over: CREEK

081341702, Audubon, IA

Built 2008 Load: 49.5 t ADT: 46

LOCAL

Fair

Over: CREEK

080361002, Audubon, IA

Built 1988 Load: 52.5 t ADT: 30

FM-M-66

Fair

Over: CREEK

080361704, Audubon, IA

Built 1972 Load: 99.9 t ADT: 338

FM

Fair

Over: CREEK

079361701, Audubon, IA

Built 1952 Load: 99.9 t ADT: 50

FM-F-65

Good

Over: PLEASANT RUN

078353603, Audubon, IA

Built 1974 Load: 20.2 t ADT: 20

LOCAL

Good

Over: BUCK CREEK

078362204, Audubon, IA

Built 1985 Load: 21.2 t ADT: 15

LOCAL

Good

Over: INDIAN CREEK

079362102, Audubon, IA

Built 1984 Load: 21.2 t ADT: 41

FM

Good

Over: DAVIDS CREEK

080342502, Audubon, IA

Built 1979 Load: 21.2 t ADT: 26

FM N-14

Good

Over: TRIB OF WEST NISHNABOTNA

081362602, Audubon, IA

Built 1980 Load: 21.2 t ADT: 60

315 ST

Good

Over: CREEK

078361605, Audubon, IA

Built 2000 Load: 22.8 t ADT: 30

HERON AVE

Good

Over: CREEK

T81N R35W Sec20, Audubon, IA

Built 2017 Load: 23.0 t ADT: 41

LOCAL

Good

Over: CREEK

079362001, Audubon, IA

Built 1938 Load: 28.5 t ADT: 30

FM

Good

Over: CREEK

078360404, Audubon, IA

Built 1939 Load: 28.7 t ADT: 60

FM F-58

Good

Over: CREEK

078343404, Audubon, IA

Built 2007 Load: 28.8 t ADT: 278

LOCAL

Good

Over: CREEK

079343104, Audubon, IA

Built 2001 Load: 28.9 t ADT: 30

LOCAL

Good

Over: CREEK

081341902, Audubon, IA

Built 1940 Load: 29.7 t ADT: 30

160TH ST

Good

Over: CREEK

0.5 M. E. of Nighhawk Ave, Audubon, IA

Built 2016 Load: 30.0 t ADT: 15

FM

Good

Over: CREEK

078362203, Audubon, IA

Built 2002 Load: 30.2 t ADT: 110

FM

Good

Over: CREEK

078362203, Audubon, IA

Built 2002 Load: 31.4 t ADT: 110

LOCAL

Good

Over: CREEK

081352001, Audubon, IA

Built 1994 Load: 31.5 t ADT: 26

130TH ST

Good

Over: CREEK

081341901 LOCAL RD, Audubon, IA

Built 2018 Load: 32.0 t ADT: 5

FM

Good

Over: CREEK

080342301, Audubon, IA

Built 2003 Load: 32.7 t ADT: 428

FM

Good

Over: CREEK

080342301, Audubon, IA

Built 2003 Load: 32.7 t ADT: 428

FM

Good

Over: BUCK CREEK

078362802, Audubon, IA

Built 1973 Load: 33.1 t ADT: 110

130TH ST

Good

Over: CREEK

081342001, Audubon, IA

Built 2023 Load: 33.4 t ADT: 21

F58 LITTLEFIELD DR

Good

Over: DRAINAGE DITCH

0.3 mile W. of Eagle Ave., Audubon, IA

Built 2015 Load: 34.3 t ADT: 597

LOCAL

Good

Over: ELKHORN CREEK

079363601, Audubon, IA

Built 1996 Load: 34.6 t ADT: 26

LOCAL

Good

Over: CREEK

081363504, Audubon, IA

Built 1998 Load: 34.6 t ADT: 30

FM

Good

Over: NISHNABOTNA RIVER

080353503, Audubon, IA

Built 1987 Load: 34.9 t ADT: 100

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