Hamilton County, IA

134 public highway bridges

Hamilton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Hamilton County, Iowa contains 134 public highway bridges. Roughly 32.1% are rated “Good,” 31.3% “Fair,” and 24.6% “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.

134
Total Bridges
32.1%
Good
31.3%
Fair
24.6%
Poor Condition

Condition Distribution

Good
32.1% (43)
Fair
31.3% (42)
Poor
24.6% (33)

All Bridges (134)

LOCAL

Good

Over: WHITE FOX CREEK

089251005, Hamilton, IA

Built 1989 Load: 99.9 t ADT: 26

LOCAL LEGNO

Poor

Over: STREAM

087262904, Hamilton, IA

Built 1920

INKPADUTA AVE

Poor

Over: BOONE RIVER

088253003, Hamilton, IA

Built 1907 ADT: 40

280TH ST

Poor

Over: BOONE RIVER

088253108, Hamilton, IA

Built 1902 ADT: 62

LOCAL

Poor

Over: DRAINAGE DITCH

089230701, Hamilton, IA

Built 1975 Load: 6.9 t ADT: 15

LOCAL

Poor

Over: IOWAY CREEK

086253201, Hamilton, IA

Built 1917 Load: 10.5 t ADT: 45

LOCAL

Poor

Over: BOONE RIVER

087261604, Hamilton, IA

Built 1954 Load: 10.9 t ADT: 60

LOCAL

Poor

Over: DRAINAGE DITCH

089230502, Hamilton, IA

Built 1922 Load: 13.6 t ADT: 15

LOCAL

Poor

Over: CREEK

086241001, Hamilton, IA

Built 1918 Load: 14.6 t ADT: 131

LOCAL

Poor

Over: BOONE RIVER

089250703, Hamilton, IA

Built 1924 Load: 15.4 t ADT: 26

LOCAL

Poor

Over: IOWAY CREEK

086253002, Hamilton, IA

Built 1952 Load: 17.2 t ADT: 15

FM

Poor

Over: DRAINAGE DITCH

088232502, Hamilton, IA

Built 1949 Load: 17.7 t ADT: 15

FM

Poor

Over: BOONE RIVER

089251701, Hamilton, IA

Built 1955 Load: 17.8 t ADT: 60

LOCAL

Poor

Over: BREWERS CR

088260304, Hamilton, IA

Built 1926 Load: 17.9 t ADT: 15

VAIL AVE

Poor

Over: OVER CC RR

089232704, Hamilton, IA

Built 1932 Load: 18.1 t ADT: 578

LOCAL

Poor

Over: DRAINAGE DITCH

088242501, Hamilton, IA

Built 1919 Load: 19.0 t ADT: 30

FM

Poor

Over: DRAINAGE DITCH

088242301, Hamilton, IA

Built 1923 Load: 19.8 t ADT: 26

LOCAL

Poor

Over: BEAR CR

086233601, Hamilton, IA

Built 1918 Load: 20.0 t ADT: 15

LOCAL

Poor

Over: DRAINAGE DITCH

089231501, Hamilton, IA

Built 1925 Load: 20.0 t ADT: 5

FM

Poor

Over: DRAINAGE DITCH

087241704, Hamilton, IA

Built 1920 Load: 20.8 t ADT: 34

FM

Poor

Over: DRAINAGE DITCH

088232404, Hamilton, IA

Built 1923 Load: 20.8 t ADT: 11

FM

Poor

Over: LONG DICK CREEK

086230901, Hamilton, IA

Built 1924 Load: 21.5 t ADT: 30

FM

Poor

Over: DRAINAGE DITCH

089231006, Hamilton, IA

Built 1960 Load: 21.8 t ADT: 319

FM

Poor

Over: CREEK

086243604, Hamilton, IA

Built 1957 Load: 22.1 t ADT: 240

FM

Poor

Over: WHITE FOX CREEK

089252103, Hamilton, IA

Built 1960 Load: 22.3 t ADT: 330

FM

Poor

Over: KEIGLEY CREEK

086252402, Hamilton, IA

Built 1949 Load: 22.7 t ADT: 26

LOCAL

Poor

Over: LONG DICK CR

086233401, Hamilton, IA

Built 1916 Load: 23.3 t ADT: 20

LOCAL

Poor

Over: DRAINAGE DITCH

087242101, Hamilton, IA

Built 1923 Load: 24.2 t ADT: 30

FM

Poor

Over: BOONE RIVER

089253101, Hamilton, IA

Built 1964 Load: 24.3 t ADT: 499

LOCAL

Poor

Over: LONG DICK CR

086230401, Hamilton, IA

Built 1924 Load: 25.3 t ADT: 20

FAS 3556

Poor

Over: CREEK

086230602, Hamilton, IA

Built 1947 Load: 31.7 t ADT: 478

FM

Poor

Over: SKUNK RIVER

086242503, Hamilton, IA

Built 1974 Load: 32.8 t ADT: 698

FM

Poor

Over: SKUNK RIVER

086243603, Hamilton, IA

Built 1992 Load: 35.9 t ADT: 459

LOCAL

Poor

Over: BREWERS CREEK

089263501, Hamilton, IA

Built 1971 Load: 99.9 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.