Hamilton County, IA

134 public highway bridges

Hamilton County Bridge Snapshot

Hamilton County, Iowa contains 134 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.1% are rated “Good,” 31.3% “Fair,” 24.6% “Poor,” and 24.6% 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.

134
Total Bridges
32.1%
Good
24.6%
Poor
24.6%
Structurally Deficient

Condition Distribution

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

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

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: 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: 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

INKPADUTA AVE

Structurally Deficient

Over: BOONE RIVER

088253003, Hamilton, IA

Built 1907 ADT: 40

280TH ST

Structurally Deficient

Over: BOONE RIVER

088253108, Hamilton, IA

Built 1902 ADT: 62

LOCAL

Structurally Deficient

Over: DRAINAGE DITCH

089230701, Hamilton, IA

Built 1975 Load: 6.9 t ADT: 15

LOCAL

Structurally Deficient

Over: IOWAY CREEK

086253201, Hamilton, IA

Built 1917 Load: 10.5 t ADT: 45

VAIL AVE

Structurally Deficient

Over: OVER CC RR

089232704, Hamilton, IA

Built 1932 Load: 18.1 t ADT: 578

LOCAL

Structurally Deficient

Over: DRAINAGE DITCH

088242501, Hamilton, IA

Built 1919 Load: 19.0 t ADT: 30

FM

Structurally Deficient

Over: CREEK

086243604, Hamilton, IA

Built 1957 Load: 22.1 t ADT: 240

LOCAL

Structurally Deficient

Over: LONG DICK CR

086233401, Hamilton, IA

Built 1916 Load: 23.3 t ADT: 20

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial