Hardin County, IA

211 public highway bridges

Hardin County Bridge Snapshot

Hardin County, Iowa contains 211 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.9% are rated “Good,” 33.6% “Fair,” 30.3% “Poor,” and 30.3% 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.

211

Total Bridges

29.9%

Good

30.3%

Poor

30.3%

Structurally Deficient

Condition Distribution

Good

29.9% (63)

Fair

33.6% (71)

Poor

30.3% (64)

SD

30.3% (64)

All Bridges (211)

Sort:

EB US 20

Over: CO RD S-27

AT JUNCTION WITH SR S27, Hardin, IA

Built 1990 ADT: 545

WB US 20

Over: CO RD S-27

AT JUNCTION WITH SR S27, Hardin, IA

Built 1990 ADT: 545

D AVENUE

Over: US 20

2.0 MILES W OF SR S27, Hardin, IA

Built 1990 ADT: 9,600

H AVENUE

Over: US 20

2.0 MILES E OF JCT SR S27, Hardin, IA

Built 1990 ADT: 9,400

JJ AVENUE

Over: US 20

2.0 MILES W OF JCT US 65, Hardin, IA

Built 1990 ADT: 9,400

US 20 EB

Over: US 65

AT JUNCTION WITH US 65, Hardin, IA

Built 2003 ADT: 1,820

US 20 WB

Over: US 65

AT JUNCTION WITH US 65, Hardin, IA

Built 2003 ADT: 1,820

US 20 EB

Over: D 35 (ELM ST)

3.4 MILES E OF JCT US 65, Hardin, IA

Built 2003 ADT: 125

US 20 WB

Over: D 35 (ELM ST)

3.4 MILES E OF JCT US 65, Hardin, IA

Built 2003 ADT: 125

V AVENUE

Over: US 20

2.4 MILES W OF JCT SR S56, Hardin, IA

Built 2003 ADT: 9,300

T AVENUE

Over: US 20

1.2 MILES E OF JCT SR D35, Hardin, IA

Built 2003 ADT: 9,300

D35

Over: US 20

AT JUNCTION SR D35, Hardin, IA

Built 2003 ADT: 9,000

S 56

Over: US 20

AT JUNCTION WITH SR S56, Hardin, IA

Built 2003 ADT: 9,500

290TH ST

Over: CREEK

086191101, Hardin, IA

Built 2000 Load: 13.2 t ADT: 69

FM

Over: BEAR CREEK

086190202, Hardin, IA

Built 1985 Load: 15.3 t ADT: 15

LOCAL

Over: HONEY CREEK

087222501, Hardin, IA

Built 1983 Load: 15.8 t ADT: 15

FM

Over: BEAR CREEK

087193502, Hardin, IA

Built 1986 Load: 15.9 t ADT: 20

LOCAL

Over: TIPTON CREEK

088223302, Hardin, IA

Built 1900 Load: 16.0 t ADT: 25

LOCAL

Over: SMALL STREAM

089221701, Hardin, IA

Built 1987 Load: 17.8 t ADT: 26

HIDDEN VALLY DR

Over: ELK RUN

000000000, Hardin, IA

Built 1977 Load: 18.1 t ADT: 66

FM

Over: BEAR CREEK

086190907, Hardin, IA

Built 1900 Load: 18.5 t ADT: 59

LOCAL

Over: CREEK

086190201, Hardin, IA

Built 1990 Load: 18.7 t ADT: 20

LOCAL

Over: CREEK

089223204, Hardin, IA

Built 1987 Load: 19.8 t ADT: 30

LOCAL

Over: SOUTH FORK

089220607, Hardin, IA

Built 1981 Load: 20.3 t ADT: 16

LOCAL

Over: SO.FK. IOWA RIVER

089222801, Hardin, IA

Built 1990 Load: 22.6 t ADT: 26

FM

Over: SMALL

088193602, Hardin, IA

Built 1983 Load: 23.2 t ADT: 34

FM

Over: CREEK

087191404, Hardin, IA

Built 1988 Load: 24.3 t ADT: 39

FM

Over: CREEK

086190513, Hardin, IA

Built 1967 Load: 24.5 t ADT: 285

LOCAL

Over: HONEY CREEK

087222301, Hardin, IA

Built 1980 Load: 24.8 t ADT: 26

LOCAL

Over: CREEK

086211204, Hardin, IA

Built 1956 Load: 25.1 t ADT: 41

LOCAL

Over: IOWA RIVER

088200205, Hardin, IA

Built 1983 Load: 25.1 t ADT: 41

FM

Over: CREEK

088190204, Hardin, IA

Built 1985 Load: 25.3 t ADT: 5

FM

Over: BEAVER CREEK

088200804, Hardin, IA

Built 1982 Load: 25.3 t ADT: 15

LOCAL

Over: IA RIVER

088220304, Hardin, IA

Built 1957 Load: 25.4 t ADT: 26

LOCAL

Over: CREEK

087201106, Hardin, IA

Built 1959 Load: 25.5 t ADT: 20

FM

Over: CREEK

088190304, Hardin, IA

Built 1970 Load: 25.7 t ADT: 1,493

FM

Over: ELK CREEK

088192707, Hardin, IA

Built 1964 Load: 25.7 t ADT: 491

FM

Over: CREEK

086203302, Hardin, IA

Built 1921 Load: 25.9 t ADT: 147

FM

Over: BEAVER CREEK

088200701, Hardin, IA

Built 1942 Load: 26.6 t ADT: 44

LOCAL

Over: HONEY CREEK

086210302, Hardin, IA

Built 1963 Load: 26.7 t ADT: 16

LOCAL

Over: SOUTH FORK IOWA RIVER

087202604, Hardin, IA

Built 1986 Load: 27.3 t ADT: 21

LOCAL

Over: HONEY CREEK

087222402, Hardin, IA

Built 1985 Load: 28.4 t ADT: 51

LOCAL

Over: HONEY CREEK

086210202, Hardin, IA

Built 1981 Load: 29.0 t ADT: 51

LOCAL

Over: CREEK

086220103, Hardin, IA

Built 1989 Load: 29.5 t ADT: 51

LOCAL

Over: SOUTH FORK IOWA RIVER

087201703, Hardin, IA

Built 1985 Load: 29.8 t ADT: 35

LOCAL

Over: SOUTH FORK IOWA RIVER

088212004, Hardin, IA

Built 1980 Load: 30.2 t ADT: 47

FM

Over: IOWA RIVER

088201205, Hardin, IA

Built 1982 Load: 30.7 t ADT: 47

FM

Over: IOWA RIVER

086190907, Hardin, IA

Built 1978 Load: 30.8 t ADT: 59

FM

Over: CREEK

089211105, Hardin, IA

Built 1982 Load: 30.8 t ADT: 442

FM

Over: TIPTON CREEK

087211701, Hardin, IA

Built 1968 Load: 31.3 t ADT: 236

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 6, 2026