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)

280TH ST

Good

Over: CREEK

LOCAL 078340503, Audubon, IA

Built 2012 Load: 35.6 t ADT: 91

270 ST

Good

Over: INDIAN CREEK

079363003, Audubon, IA

Built 2000 Load: 35.6 t ADT: 72

150 ST

Good

Over: E NISHNABOTNA RIVER

081343101, Audubon, IA

Built 2000 Load: 35.6 t ADT: 29

FM F-65

Good

Over: TROUBLESOME CR

078353505, Audubon, IA

Built 1989 Load: 36.6 t ADT: 34

FM

Good

Over: BEAVER CREEK

081340202, Audubon, IA

Built 1994 Load: 36.8 t ADT: 20

FM

Good

Over: CREEK

081363501, Audubon, IA

Built 2006 Load: 36.9 t ADT: 409

FM

Good

Over: INDIAN CREEK

079362202, Audubon, IA

Built 1996 Load: 37.2 t ADT: 45

LOCAL

Good

Over: E NISHNABOTNA RIVER

078350501, Audubon, IA

Built 1996 Load: 37.6 t ADT: 41

KINGBIRD AVE

Good

Over: BR NISHNABOTNA RIVER

1.5 Mile N. of Co Hwy F32, Audubon, IA

Built 2016 Load: 37.6 t ADT: 34

LARK AVE

Good

Over: CREEK

FM 80353606, Audubon, IA

Built 2017 Load: 37.6 t ADT: 60

LOCAL

Good

Over: TROUBLESOME CREEK

078352403, Audubon, IA

Built 1994 Load: 37.9 t ADT: 26

IA 173

Good

Over: INDIAN CREEK

0.5 MI. S OF Jct. IA 44, Audubon, IA

Built 2003 Load: 38.2 t ADT: 1,360

305TH ST

Good

Over: TROUBLESOME CREEK

078340707, Audubon, IA

Built 2021 Load: 38.2 t ADT: 51

140TH ST

Good

Over: CREEK

081362501, Audubon, IA

Built 2013 Load: 38.2 t ADT: 35

US 71

Good

Over: BLUEGRASS CREEK

1.4 mi. S of Jct. SR F32, Audubon, IA

Built 2006 Load: 38.5 t ADT: 3,080

LARK AVE

Good

Over: CREEK

0.25 Mile S. Co Hwy F32, Audubon, IA

Built 2017 Load: 38.6 t ADT: 29

LARK AVE

Good

Over: BR E NISHNABOTNA R

FM 081351202, Audubon, IA

Built 2018 Load: 38.6 t ADT: 50

LOCAL

Good

Over: E NISHNABOTNA RIVER

080352501, Audubon, IA

Built 1998 Load: 38.8 t ADT: 103

130TH ST

Good

Over: CREEK

081 34 24 01, Audubon, IA

Built 2021 Load: 38.8 t ADT: 20

GOLDFINCH AVE

Good

Over: CREEK

081350702, Audubon, IA

Built 2021 Load: 38.8 t ADT: 50

FM

Good

Over: CREEK

000000000, Audubon, IA

Built 2010 Load: 40.0 t ADT: 34

FM

Good

Over: CREEK

081342502, Audubon, IA

Built 1932 Load: 40.0 t ADT: 15

N36 PHEASANT AVE

Good

Over: DAVIDS CREEK

FM 079340302, Audubon, IA

Built 2021 Load: 41.5 t ADT: 240

PHEASANT AVE

Good

Over: CREEK

081340302, Audubon, IA

Built 2019 Load: 49.7 t ADT: 35

FM

Good

Over: BEAVER CREEK

081340203, Audubon, IA

Built 1991 Load: 49.8 t ADT: 11

F58 LITTLEFIELD DR

Good

Over: CREEK

FM 078340802, Audubon, IA

Built 2005 Load: 52.9 t ADT: 548

FM

Good

Over: ELK HORN CREEK

078360405, Audubon, IA

Built 2002 Load: 55.3 t ADT: 20

FM F-58

Good

Over: CROOKED CREEK

078342702, Audubon, IA

Built 2003 Load: 58.1 t ADT: 278

LOCAL

Poor

Over: CREEK

079341603, Audubon, IA

Built 1932 ADT: 15

LOCAL

Poor

Over: CREEK

078342601, Audubon, IA

Built 1935 Load: 2.7 t ADT: 21

LOCAL

Poor

Over: NISHNABOTNA RIVER

079352203, Audubon, IA

Built 1958 Load: 6.3 t ADT: 35

FM

Poor

Over: CREEK

079343003, Audubon, IA

Built 1956 Load: 9.9 t ADT: 34

LOCAL

Poor

Over: CREEK

079361108, Audubon, IA

Built 1956 Load: 10.6 t ADT: 26

270TH ST

Poor

Over: CREEK

079353101, Audubon, IA

Built 1959 Load: 11.7 t ADT: 20

FM

Poor

Over: CREEK

080351001, Audubon, IA

Built 1946 Load: 14.2 t ADT: 34

LOCAL

Poor

Over: CREEK

080361403, Audubon, IA

Built 1967 Load: 14.9 t ADT: 26

LOCAL

Poor

Over: CREEK

078342701, Audubon, IA

Built 1951 Load: 15.1 t ADT: 11

LOCAL

Poor

Over: CREEK

079362201, Audubon, IA

Built 1964 Load: 15.2 t ADT: 30

LOCAL

Poor

Over: CREEK

081351802, Audubon, IA

Built 1933 Load: 15.2 t ADT: 21

LOCAL

Poor

Over: BR BLUE GRASS CREEK

079351008, Audubon, IA

Built 1925 Load: 16.0 t ADT: 21

LOCAL

Poor

Over: CREEK

080361902, Audubon, IA

Built 1926 Load: 16.5 t ADT: 11

LOCAL

Poor

Over: CREEK

079362501, Audubon, IA

Built 1940 Load: 16.6 t ADT: 5

LOCAL

Poor

Over: E NISHNABOTNA RIVER

081343001, Audubon, IA

Built 1971 Load: 17.1 t ADT: 26

LOCAL(SHELBY!)

Poor

Over: CREEK

079363102, Audubon, IA

Built 1928 Load: 20.4 t ADT: 21

LOCAL

Poor

Over: E NISHNABOTNA RIVER

081351101, Audubon, IA

Built 1971 Load: 20.4 t ADT: 35

LOCAL

Poor

Over: CREEK

081360702, Audubon, IA

Built 1987 Load: 20.6 t ADT: 21

LOCAL

Poor

Over: CREEK

081350701, Audubon, IA

Built 1951 Load: 21.5 t ADT: 5

FM

Poor

Over: CREEK

078360301, Audubon, IA

Built 1948 Load: 22.9 t ADT: 20

LOCAL

Poor

Over: ELKHORN CREEK

078360604, Audubon, IA

Built 1973 Load: 23.5 t ADT: 62

LOCAL

Poor

Over: CREEK

081342403, Audubon, IA

Built 1950 Load: 23.9 t ADT: 5

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