Lyon County, IA

241 public highway bridges

Lyon County Bridge Snapshot

Lyon County, Iowa contains 241 public highway bridges in the FHWA National Bridge Inventory. Roughly 41.1% are rated “Good,” 37.8% “Fair,” 21.2% “Poor,” and 21.2% 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.

241
Total Bridges
41.1%
Good
21.2%
Poor
21.2%
Structurally Deficient

Condition Distribution

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

All Bridges (241)

K14 BUCHANAN AVE

Good

Over: BLOOD RUN CREEK

100481302, Lyon, IA

Built 2019 Load: 32.7 t ADT: 50

FM

Good

Over: SMALL STREAM

099451301, Lyon, IA

Built 1990 Load: 32.7 t ADT: 30

LOCAL

Good

Over: SMALL STREAM

100463201, Lyon, IA

Built 1990 Load: 32.7 t ADT: 81

LOCAL

Good

Over: SMALL STREAM

099441701, Lyon, IA

Built 1991 Load: 32.7 t ADT: 26

LOCAL

Good

Over: SMALL STREAM

099453101, Lyon, IA

Built 1991 Load: 32.7 t ADT: 26

LOCAL ROAD

Good

Over: TRIB TO MUD CREEK

099460202, Lyon, IA

Built 2004 Load: 32.7 t ADT: 112

LOCAL ROAD

Good

Over: TRIB TO MUD CREEK

099461001, Lyon, IA

Built 2004 Load: 32.7 t ADT: 46

LOCAL ROAD

Good

Over: TRIB TO MUD CREEK

100460904, Lyon, IA

Built 2004 Load: 32.7 t ADT: 26

LOCAL ROAD

Good

Over: SMALL

100483302, Lyon, IA

Built 2004 Load: 32.7 t ADT: 62

140TH ST

Good

Over: DRY RUN CREEK

100443501, Lyon, IA

Built 2005 Load: 32.7 t ADT: 20

KENNEDY AVE

Good

Over: DRY RUN CREEK

100443602, Lyon, IA

Built 2005 Load: 32.7 t ADT: 35

BUCHANAN AVE

Good

Over: MCLAREN CREEK

098481202, Lyon, IA

Built 1992 Load: 32.7 t ADT: 35

FM

Good

Over: KANARANZI CREEK

100452201, Lyon, IA

Built 1980 Load: 33.7 t ADT: 100

LOCAL ROAD

Good

Over: TOM CREEK

1002431902, Lyon, IA

Built 2011 Load: 34.4 t ADT: 26

LOCAL ROAD

Good

Over: JOHNSON CREEK

098440701, Lyon, IA

Built 2005 Load: 35.7 t ADT: 30

FM

Good

Over: SMALL STREAM

100431702, Lyon, IA

Built 1977 Load: 36.2 t ADT: 45

CHERRY AVE

Good

Over: PLUM CREEK

98470602, Lyon, IA

Built 2018 Load: 36.3 t ADT: 90

210TH ST

Good

Over: PLUM CREEK

098480101, Lyon, IA

Built 2018 Load: 36.3 t ADT: 11

210TH ST

Good

Over: PLUM CREEK

098480101, Lyon, IA

Built 2018 Load: 36.3 t ADT: 11

LOCAL ROAD

Good

Over: LITTLE ROCK RIVER

099433003, Lyon, IA

Built 1999 Load: 37.6 t ADT: 26

BIRCH AVE

Good

Over: KLONDIKE CREEK

099481402, Lyon, IA

Built 2021 Load: 37.9 t ADT: 103

BUCHANAN AVE

Good

Over: KLONDIKE CREEK

099481202, Lyon, IA

Built 2019 Load: 38.9 t ADT: 26

W DAKTOA AVE

Good

Over: RIO GRANDE CREEK

098440201, Lyon, IA

Built 2011 Load: 38.9 t ADT: 1,349

LOG AVE

Good

Over: WEST RAT CREEK

098431402, Lyon, IA

Built 2020 Load: 39.9 t ADT: 34

240TH ST

Good

Over: RAT CREEK

098432401, Lyon, IA

Built 2020 Load: 39.9 t ADT: 81

220TH ST

Good

Over: EMERY CREEK

098451101, Lyon, IA

Built 2017 Load: 39.9 t ADT: 46

IBEX AVE

Good

Over: EMERY CREEK

098451202, Lyon, IA

Built 2017 Load: 39.9 t ADT: 46

260TH ST

Good

Over: ALBERTSON CREEK

098473501, Lyon, IA

Built 2017 Load: 39.9 t ADT: 50

A42 240TH ST

Good

Over: ALBERTSON CREEK

098472201, Lyon, IA

Built 2019 Load: 40.2 t ADT: 1,176

K30 DOVE AVE

Good

Over: SYKES CREEK

099470104, Lyon, IA

Built 2019 Load: 40.2 t ADT: 450

JAY AVE

Good

Over: TOM CREEK

100442702, Lyon, IA

Built 2015 Load: 40.2 t ADT: 30

ASHLEY AVE

Good

Over: BLOOD RUN CREEK

100482102, Lyon, IA

Built 2018 Load: 40.2 t ADT: 21

LARCH AVE

Good

Over: OVERFLOW OTTER CREEK

098433302, Lyon, IA

Built 2022 Load: 41.1 t ADT: 30

LOCAL ROAD

Good

Over: LITTLE ROCK RIVER

098441501, Lyon, IA

Built 1997 Load: 41.5 t ADT: 81

A42 240TH ST

Good

Over: MUD CREEK

098462201, Lyon, IA

Built 2003 Load: 41.6 t ADT: 698

FM

Good

Over: BNSF RR

098462201, Lyon, IA

Built 2003 Load: 44.7 t ADT: 698

FM

Good

Over: JOHNSON CREEK

098440501, Lyon, IA

Built 2006 Load: 45.4 t ADT: 1,168

ASHLEY AVE

Good

Over: PETERSON CREEK

099480902, Lyon, IA

Built 2022 Load: 45.7 t ADT: 50

LOCAL ROAD

Good

Over: BLOOD RUN CREEK

100482301, Lyon, IA

Built 2000 Load: 48.0 t ADT: 21

FM

Good

Over: BLOOD RUN CREEK

100481201, Lyon, IA

Built 2000 Load: 50.0 t ADT: 439

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

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

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