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)

Sort:

LOCAL ROAD

Over: MUD CREEK

098462701, Lyon, IA

Built 1962 Load: 13.3 t ADT: 62

FM

Over: LITTLE ROCK RIVER

098441602, Lyon, IA

Built 1950 Load: 16.3 t ADT: 50

US 75

Over: DRAINAGE DITCH

3.8 mi. N of N Jct. IA 9, Lyon, IA

Built 1935 Load: 17.0 t ADT: 1,500

IA 9

Over: STREAM

200 ft. S of Jct. SR K12, Lyon, IA

Built 1940 Load: 18.1 t ADT: 4,520

IA 9

Over: MOON CREEK

0.3 mi. W of W jct. US 75, Lyon, IA

Built 1974 Load: 20.0 t ADT: 3,180

LOCAL ROAD

Over: MUD CREEK

098461601, Lyon, IA

Built 1900 Load: 20.0 t ADT: 49

LOCAL ROAD

Over: MUD CREEK

099462901, Lyon, IA

Built 1971 Load: 20.0 t ADT: 26

LOCAL ROAD

Over: MUD CREEK

099463201, Lyon, IA

Built 1971 Load: 20.0 t ADT: 30

IA 182

Over: STREAM

2.5 mi. S of Jct. IA 9, Lyon, IA

Built 1955 Load: 21.0 t ADT: 2,500

FM

Over: HEFFERMAN CREEK

098473402, Lyon, IA

Built 1978 Load: 21.0 t ADT: 60

LOCAL

Over: MUD CREEK

100473601, Lyon, IA

Built 1963 Load: 21.0 t ADT: 112

K14 BEECH AVE

Over: PLUM CREEK

098480306, Lyon, IA

Built 1977 Load: 21.4 t ADT: 41

LOCAL ROAD

Over: SPRING CREEK

099460902, Lyon, IA

Built 1971 Load: 22.1 t ADT: 30

LOCAL ROAD

Over: RAT CREEK

098432402, Lyon, IA

Built 1900 Load: 23.0 t ADT: 50

FM

Over: ARGO SLOUGH

099431202, Lyon, IA

Built 1977 Load: 23.4 t ADT: 789

LOCAL ROAD

Over: MOON CREEK

100463601, Lyon, IA

Built 1900 Load: 23.9 t ADT: 62

US 75

Over: ROCK RIVER

0.2 mi. N of S Jct SR A34, Lyon, IA

Built 1975 Load: 24.4 t ADT: 2,620

A50 260TH ST

Over: SMALL STREAM

098483103, Lyon, IA

Built 1968 Load: 24.5 t ADT: 888

FM

Over: DRY RUN CREEK

099440702, Lyon, IA

Built 1958 Load: 24.5 t ADT: 270

LOCAL ROAD

Over: EMERY CREEK

099442002, Lyon, IA

Built 1900 Load: 24.5 t ADT: 15

FM

Over: SMALL STREAM

100442001, Lyon, IA

Built 1978 Load: 24.5 t ADT: 71

FM

Over: ALBERTSON CREEK

0984715, Lyon, IA

Built 1973 Load: 24.6 t ADT: 100

FM

Over: LIZARD CREEK

098463301, Lyon, IA

Built 1970 Load: 24.9 t ADT: 399

FM

Over: WEST RAT CREEK

098431501, Lyon, IA

Built 1977 Load: 25.5 t ADT: 259

FM

Over: PUTNAM CREEK

098443301, Lyon, IA

Built 1977 Load: 25.5 t ADT: 649

FM

Over: LITTLE ROCK RIVER

098451404, Lyon, IA

Built 1955 Load: 25.6 t ADT: 369

FM

Over: LITTLE ROCK RIVER

098453101, Lyon, IA

Built 1954 Load: 25.6 t ADT: 709

FM

Over: TOM CREEK

100432202, Lyon, IA

Built 1980 Load: 25.7 t ADT: 60

FM

Over: EMERY CREEK

099443002, Lyon, IA

Built 1980 Load: 25.9 t ADT: 270

LOG AVE

Over: WEST RAT CREEK

098431402, Lyon, IA

Built 1900 Load: 26.1 t ADT: 34

LOCAL ROAD

Over: TAFT CREEK

099432302, Lyon, IA

Built 1900 Load: 26.1 t ADT: 30

LOCAL ROAD

Over: SMALL STREAM

100431501, Lyon, IA

Built 1900 Load: 26.1 t ADT: 15

LOCAL ROAD

Over: ALBERTSON CREEK

098472302, Lyon, IA

Built 2008 Load: 26.5 t ADT: 41

FM

Over: RAT CREEK

098431301, Lyon, IA

Built 1971 Load: 26.6 t ADT: 399

IA 9

Over: BLOODRUN CREEK

0.3 mi. E of Jct. SR K12, Lyon, IA

Built 1977 Load: 26.8 t ADT: 4,520

LOCAL

Over: LITTLE ROCK RIVER

098452202, Lyon, IA

Built 1987 Load: 26.8 t ADT: 26

FM

Over: BURR OAK CREEK

098453502, Lyon, IA

Built 1961 Load: 27.0 t ADT: 758

LOCAL ROAD

Over: LITTLE ROCK RIVER

099433201, Lyon, IA

Built 1970 Load: 27.1 t ADT: 34

A18 (140TH ST)

Over: BIG SIOUX RIVER

100493503, Lyon, IA

Built 1963 Load: 27.3 t ADT: 1,607

LOCAL ROAD

Over: WEST RAT CREEK

098432201, Lyon, IA

Built 1993 Load: 27.4 t ADT: 11

LOCAL

Over: LITTLE ROCK RIVER

098430604, Lyon, IA

Built 1982 Load: 27.6 t ADT: 143

FM

Over: TOOLE CREEK

100461902, Lyon, IA

Built 1970 Load: 27.6 t ADT: 290

LOCAL ROAD

Over: OTTER CREEK

098442800, Lyon, IA

Built 2010 Load: 27.9 t ADT: 35

US 18

Over: BIG SIOUX RIVER

at S.DAKOTA BORDER, Lyon, IA

Built 1978 Load: 28.0 t ADT: 2,130

LOCAL ROAD

Over: ALBERTSON CREEK

098472601, Lyon, IA

Built 1900 Load: 28.2 t ADT: 21

FM

Over: EMERY CREEK

098450101, Lyon, IA

Built 1977 Load: 28.7 t ADT: 818

FM

Over: LITTLE ROCK RIVER

099430302, Lyon, IA

Built 1975 Load: 28.8 t ADT: 100

A50 (BRIDGE ST)

Over: BIG SIOUX RIVER

098492519, Lyon, IA

Built 1971 Load: 29.2 t ADT: 888

LOCAL ROAD

Over: OVERFLOW

099431102, Lyon, IA

Built 1900 Load: 29.2 t ADT: 26

FM

Over: ALLEN CREEK

098443601, Lyon, IA

Built 1978 Load: 29.3 t ADT: 45

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

Related

Browse all → | Rankings →

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

P

Compiled by PlainBridges, Independent data publisher

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.