Humboldt County, IA

70 public highway bridges

Humboldt County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Humboldt County, Iowa contains 70 public highway bridges. Roughly 34.3% are rated “Good,” 52.9% “Fair,” and 12.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

70
Total Bridges
34.3%
Good
52.9%
Fair
12.9%
Poor Condition

Condition Distribution

Good
34.3% (24)
Fair
52.9% (37)
Poor
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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.