Humboldt County, IA

70 public highway bridges

Humboldt County Bridge Snapshot

Humboldt County, Iowa contains 70 public highway bridges in the FHWA National Bridge Inventory. Roughly 34.3% are rated “Good,” 52.9% “Fair,” 12.9% “Poor,” and 12.9% 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.

70
Total Bridges
34.3%
Good
12.9%
Poor
12.9%
Structurally Deficient

Condition Distribution

Good
34.3% (24)
Fair
52.9% (37)
Poor
12.9% (9)
SD
12.9% (9)

All Bridges (70)

LOCAL

Fair

Over: DD

092291902, Humboldt, IA

Built 1900 Load: 16.2 t ADT: 100

LOCAL

Fair

Over: DD

091292801, Humboldt, IA

Built 1900 Load: 18.1 t ADT: 20

FM

Fair

Over: DRAINAGE DITCH

091282301, Humboldt, IA

Built 1900 Load: 19.0 t ADT: 529

LOCAL

Fair

Over: CREEK

093290702, Humboldt, IA

Built 1966 Load: 19.7 t ADT: 15

LOCAL

Fair

Over: DD

092270802, Humboldt, IA

Built 1900 Load: 20.0 t ADT: 50

LOCAL

Fair

Over: DD

093271402, Humboldt, IA

Built 1960 Load: 20.4 t ADT: 34

LOCAL

Fair

Over: DD

092301303, Humboldt, IA

Built 1955 Load: 21.1 t ADT: 11

LOCAL

Fair

Over: DD

093293202, Humboldt, IA

Built 1953 Load: 21.2 t ADT: 40

LOCAL

Fair

Over: DD

093272001, Humboldt, IA

Built 1900 Load: 21.4 t ADT: 15

LOCAL

Fair

Over: DD

091271504, Humboldt, IA

Built 1937 Load: 21.7 t ADT: 15

LOCAL

Fair

Over: CREEK

091282802, Humboldt, IA

Built 1900 Load: 22.4 t ADT: 40

FM

Fair

Over: DM RIVER

091281904, Humboldt, IA

Built 1961 Load: 22.5 t ADT: 559

LOCAL

Fair

Over: DRAINAGE DITCH

091292802, Humboldt, IA

Built 1955 Load: 22.5 t ADT: 11

LOCAL

Fair

Over: DD

093272404, Humboldt, IA

Built 1956 Load: 22.5 t ADT: 15

FM

Fair

Over: DM RIVER

092300705, Humboldt, IA

Built 1958 Load: 22.7 t ADT: 679

LOCAL

Fair

Over: CREEK

091291902, Humboldt, IA

Built 1900 Load: 22.9 t ADT: 11

LOCAL

Fair

Over: CREEK

093291303, Humboldt, IA

Built 1954 Load: 23.4 t ADT: 40

LOCAL

Fair

Over: CREEK

092281104, Humboldt, IA

Built 1971 Load: 24.9 t ADT: 45

LOCAL

Fair

Over: CREEK

092292004, Humboldt, IA

Built 1900 Load: 24.9 t ADT: 15

FM

Fair

Over: BLOODY RUN CREEK

093283204, Humboldt, IA

Built 1966 Load: 25.7 t ADT: 450

FM

Fair

Over: DD

093293302, Humboldt, IA

Built 1925 Load: 26.1 t ADT: 339

LOCAL

Fair

Over: DD

093282301, Humboldt, IA

Built 1955 Load: 26.6 t ADT: 5

FM

Fair

Over: DD

092301102, Humboldt, IA

Built 1948 Load: 26.8 t ADT: 34

LOCAL

Fair

Over: DD

092282902, Humboldt, IA

Built 1955 Load: 27.4 t ADT: 11

LOCAL

Fair

Over: DRAINAGE DITCH

091273602, Humboldt, IA

Built 1941 Load: 27.7 t ADT: 80

US 169

Fair

Over: W FORK DES MOINES RIVER

0.6 mi S of IA 3, Humboldt, IA

Built 1997 Load: 29.0 t ADT: 7,100

FM

Fair

Over: DRAINAGE DITCH

092270606, Humboldt, IA

Built 1940 Load: 29.8 t ADT: 170

FM

Fair

Over: PRAIRIE CREEK

093272305, Humboldt, IA

Built 1968 Load: 30.4 t ADT: 71

FM

Fair

Over: DRAINAGE DITCH

091282702, Humboldt, IA

Built 1970 Load: 30.8 t ADT: 1,257

FM

Fair

Over: DD NO 100

093270301, Humboldt, IA

Built 1974 Load: 30.8 t ADT: 290

FM

Fair

Over: PRAIRIE CREEK

093272301, Humboldt, IA

Built 1970 Load: 30.8 t ADT: 71

LOCAL

Fair

Over: DD

093302501, Humboldt, IA

Built 1900 Load: 32.2 t ADT: 15

US 169

Fair

Over: DRAINAGE DITCH

2.4 mi. N of jct. IA 3, Humboldt, IA

Built 1985 Load: 32.4 t ADT: 3,020

US 169

Fair

Over: TRULNER CREEK

0.3 mi. S of SR C20, Humboldt, IA

Built 1995 Load: 33.3 t ADT: 3,220

FM

Fair

Over: TRULINER CREEK

093292201, Humboldt, IA

Built 1937 Load: 33.4 t ADT: 649

FM

Fair

Over: DRAINAGE DITCH

091292101, Humboldt, IA

Built 1958 Load: 35.1 t ADT: 170

FM

Fair

Over: E FORK DES MOINES RIVER

093290103, Humboldt, IA

Built 1957 Load: 38.9 t ADT: 509

LOCAL RD

Good

Over: D D #2

091293001, Humboldt, IA

Built 1978 Load: 24.8 t ADT: 26

FM

Good

Over: TRULINER CREEK

093290906, Humboldt, IA

Built 1958 Load: 28.5 t ADT: 578

FM

Good

Over: DM RIVER

093281603, Humboldt, IA

Built 2001 Load: 32.7 t ADT: 478

FM

Good

Over: E.FK DES MOINES RIVER

092281003, Humboldt, IA

Built 1994 Load: 34.6 t ADT: 190

KANSAS AVE

Good

Over: CREEK

091292304, Humboldt, IA

Built 2017 Load: 34.7 t ADT: 26

JUNIPER AVE

Good

Over: CREEK

091292702, Humboldt, IA

Built 2012 Load: 35.3 t ADT: 11

270TH ST

Good

Over: CREEK

091283203, Humboldt, IA

Built 2017 Load: 36.0 t ADT: 30

GEORGIA AVE

Good

Over: DD

Humboldt, Humboldt, IA

Built 2019 Load: 37.6 t ADT: 40

FM

Good

Over: W FK DES MOINES RIVER

092292904, Humboldt, IA

Built 1990 Load: 38.5 t ADT: 518

VIRGINIA AVE

Good

Over: CREEK

T93N R27W Vernon TWP, Humboldt, IA

Built 2020 Load: 42.8 t ADT: 40

LOCAL

Good

Over: PRAIRIE CREEK

093271404, Humboldt, IA

Built 2008 Load: 43.3 t ADT: 50

MONTANA AVE

Good

Over: CREEK

093291304, Humboldt, IA

Built 2014 Load: 45.2 t ADT: 40

LOCAL

Good

Over: DRAINAGE DITCH

091271402, Humboldt, IA

Built 2004 Load: 45.3 t ADT: 34

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