Lyon County, IA

241 public highway bridges

Lyon County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Lyon County, Iowa contains 241 public highway bridges. Roughly 41.1% are rated “Good,” 37.8% “Fair,” and 21.2% “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.

241
Total Bridges
41.1%
Good
37.8%
Fair
21.2%
Poor Condition

Condition Distribution

Good
41.1% (99)
Fair
37.8% (91)
Poor
21.2% (51)

All Bridges (241)

LOCAL ROAD

Poor

Over: KLONDIKE CREEK

099481201, Lyon, IA

Built 1900 ADT: 41

LOCAL ROAD

Poor

Over: TOM CREEK

100442902, Lyon, IA

Built 1900 ADT: 15

N 2ND AVE

Poor

Over: SMALL STREAM

100453304, Lyon, IA

Built 1900 ADT: 346

LOCAL ROAD

Poor

Over: JOHNSON CREEK

098440502, Lyon, IA

Built 1900 Load: 2.7 t ADT: 5

LOCAL ROAD

Poor

Over: BLOOD RUN CREEK

100482302, Lyon, IA

Built 1900 Load: 3.4 t ADT: 90

LOCAL ROAD

Poor

Over: OVERFLOW

098433502, Lyon, IA

Built 1900 Load: 5.9 t ADT: 26

SIDE DITCH ENT

Poor

Over: SIDE DITCH

098471002, Lyon, IA

Built 1900 Load: 5.9 t ADT: 10

LOCAL ROAD

Poor

Over: SMALL STREAM

098482304, Lyon, IA

Built 1900 Load: 6.1 t ADT: 21

LOCAL ROAD

Poor

Over: LITTLE ROCK RIVER

098452907, Lyon, IA

Built 1900 Load: 7.9 t ADT: 62

LOCAL ROAD

Poor

Over: LITTLE OTTER CREEK

098433502, Lyon, IA

Built 1900 Load: 11.6 t ADT: 26

FM

Poor

Over: KANARANZI CREEK

100452202, Lyon, IA

Built 1959 Load: 13.1 t ADT: 369

LOCAL ROAD

Poor

Over: LIZARD CREEK

098462701, Lyon, IA

Built 1900 Load: 13.4 t ADT: 62

LOCAL ROAD

Poor

Over: ARGO SLOUGH

099431602, Lyon, IA

Built 1900 Load: 13.7 t ADT: 46

LOCAL ROAD

Poor

Over: TAFT CREEK

099432702, Lyon, IA

Built 1900 Load: 14.2 t ADT: 26

A26 (180TH ST)

Poor

Over: BIG SIOUX RIVER

099482103, Lyon, IA

Built 1977 Load: 14.7 t ADT: 1,017

LOCAL ROAD

Poor

Over: OVERFLOW

098472601, Lyon, IA

Built 1900 Load: 18.0 t ADT: 21

LOCAL ROAD

Poor

Over: HEFFERMAN CREEK

098473301, Lyon, IA

Built 1900 Load: 18.3 t ADT: 46

FM

Poor

Over: OVERFLOW

098430501, Lyon, IA

Built 1969 Load: 19.0 t ADT: 718

FM

Poor

Over: RIGGS CREEK

100471204, Lyon, IA

Built 1970 Load: 19.1 t ADT: 290

FM

Poor

Over: LITTLE ROCK RIVER

100433503, Lyon, IA

Built 1968 Load: 22.6 t ADT: 131

LOCAL ROAD

Poor

Over: ALLEN CREEK

098433002, Lyon, IA

Built 1900 Load: 23.0 t ADT: 26

LOCAL ROAD

Poor

Over: KLONDIKE CREEK

099480104, Lyon, IA

Built 1900 Load: 24.4 t ADT: 41

FM

Poor

Over: SMALL STREAM

099463002, Lyon, IA

Built 1972 Load: 24.5 t ADT: 240

FM

Poor

Over: NELSON CREEK

098483204, Lyon, IA

Built 1966 Load: 24.7 t ADT: 789

FM

Poor

Over: KLONDIKE CREEK

099482105, Lyon, IA

Built 1962 Load: 24.7 t ADT: 1,017

L14

Poor

Over: TURNER CREEK

100441418, Lyon, IA

Built 1964 Load: 24.7 t ADT: 509

L14

Poor

Over: DRY RUN CREEK

100442606, Lyon, IA

Built 1964 Load: 25.1 t ADT: 509

LOCAL ROAD

Poor

Over: ALBERTSON CREEK

098471601, Lyon, IA

Built 1900 Load: 25.7 t ADT: 41

L14

Poor

Over: TOM CREEK

100442304, Lyon, IA

Built 1964 Load: 25.9 t ADT: 509

LOCAL ROAD

Poor

Over: EMERY CREEK

099443001, Lyon, IA

Built 1900 Load: 26.1 t ADT: 35

FM

Poor

Over: MUD CREEK

098460406, Lyon, IA

Built 1961 Load: 26.3 t ADT: 509

FM

Poor

Over: ROCK RIVER

098462402, Lyon, IA

Built 1966 Load: 27.1 t ADT: 977

FM

Poor

Over: ROCK RIVER

098463501, Lyon, IA

Built 1970 Load: 27.3 t ADT: 399

LOCAL ROAD

Poor

Over: RAT CREEK

098432801, Lyon, IA

Built 1900 Load: 28.8 t ADT: 21

FM

Poor

Over: RAT CREEK

098432202, Lyon, IA

Built 1966 Load: 30.4 t ADT: 199

FM

Poor

Over: LITTLE OTTER CREEK

098433402, Lyon, IA

Built 1968 Load: 30.4 t ADT: 199

FM

Poor

Over: KLONDIKE CREEK

099481502, Lyon, IA

Built 1966 Load: 30.4 t ADT: 309

FM

Poor

Over: MUD CREEK

100471301, Lyon, IA

Built 1970 Load: 30.4 t ADT: 290

FM

Poor

Over: PLUM CREEK

098480102, Lyon, IA

Built 1968 Load: 32.3 t ADT: 210

FM

Poor

Over: WEST RAT CREEK

098430102, Lyon, IA

Built 1965 Load: 33.0 t ADT: 230

FM

Poor

Over: BLOOD RUN CREEK

100481902, Lyon, IA

Built 1971 Load: 36.9 t ADT: 180

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.