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)

250TH ST

Good

Over: ALLEN CREEK

098433001, Lyon, IA

Built 2017 Load: 32.4 t ADT: 30

MARSH AVE

Good

Over: LITTLE OTTER CREEK

098433602, Lyon, IA

Built 2019 Load: 32.4 t ADT: 71

JEFFERSON AVE

Good

Over: SMALL STREAM

098442302, Lyon, IA

Built 2014 Load: 32.4 t ADT: 46

A52 260TH ST

Good

Over: OTTER CREEK

098443401, Lyon, IA

Built 2020 Load: 32.4 t ADT: 649

HARRISON AVE

Good

Over: BURR OAK CREEK

098453402, Lyon, IA

Built 2019 Load: 32.4 t ADT: 50

IBEX AVE

Good

Over: BURR OAK CREEK

098453602, Lyon, IA

Built 2019 Load: 32.4 t ADT: 50

FIG AVE

Good

Over: LIZARD CREEK

0984622702, Lyon, IA

Built 2014 Load: 32.4 t ADT: 46

K42 GARFIELD AVE

Good

Over: LITTLE ROCK RIVER

098463602, Lyon, IA

Built 2011 Load: 32.4 t ADT: 1,087

210TH ST

Good

Over: PLUM CREEK

098470601, Lyon, IA

Built 2013 Load: 32.4 t ADT: 50

DOGWOOD AVE

Good

Over: OVERFLOW

098473602, Lyon, IA

Built 2019 Load: 32.4 t ADT: 30

220TH ST

Good

Over: PLUM CREEK

098480504, Lyon, IA

Built 2021 Load: 32.4 t ADT: 46

230TH ST

Good

Over: MCLAREN CREEK

098481301, Lyon, IA

Built 2014 Load: 32.4 t ADT: 72

230TH ST

Good

Over: MCLAREN CREEK

098481401, Lyon, IA

Built 2014 Load: 32.4 t ADT: 72

ABLE BLVD

Good

Over: MCLAREN CREEK

0984815, Lyon, IA

Built 2016 Load: 32.4 t ADT: 62

255TH ST

Good

Over: SMALL STREAM

098483003, Lyon, IA

Built 2022 Load: 32.4 t ADT: 30

LOG AVE

Good

Over: HESS CREEK

099432602, Lyon, IA

Built 2015 Load: 32.4 t ADT: 41

200TH ST

Good

Over: TAFT CREEK

099433301, Lyon, IA

Built 2014 Load: 32.4 t ADT: 45

200TH ST

Good

Over: HESS CREEK

099433401, Lyon, IA

Built 2015 Load: 32.4 t ADT: 26

LOCAL ROAD

Good

Over: EMERY CREEK

099441602, Lyon, IA

Built 1994 Load: 32.4 t ADT: 30

LOCAL ROAD

Good

Over: JOHNSON CREEK

099442701, Lyon, IA

Built 1995 Load: 32.4 t ADT: 50

200TH ST

Good

Over: JOHNSON CREEK

099443301, Lyon, IA

Built 2014 Load: 32.4 t ADT: 30

LOCAL ROAD

Good

Over: KLONDIKE CREEK

099470601, Lyon, IA

Built 1991 Load: 32.4 t ADT: 50

DOGWOOD AVE

Good

Over: SMALL STREAM

099471302, Lyon, IA

Built 2015 Load: 32.4 t ADT: 26

160TH ST

Good

Over: BURNS CREEK

099481201, Lyon, IA

Built 2017 Load: 32.4 t ADT: 41

BUCHANAN AVE

Good

Over: KLONDIKE CREEK

099481202, Lyon, IA

Built 2019 Load: 32.4 t ADT: 26

BUCHANAN AVE

Good

Over: KLONDIKE CREEK

099481202, Lyon, IA

Built 2019 Load: 32.4 t ADT: 26

BUCHANAN AVE

Good

Over: KLONDIKE CREEK

099481202, Lyon, IA

Built 2018 Load: 32.4 t ADT: 26

LARCH AVE

Good

Over: TOM CREEK

100432102, Lyon, IA

Built 2017 Load: 32.4 t ADT: 21

JACKSON AVE

Good

Over: TOM CREEK

100442102, Lyon, IA

Built 2017 Load: 32.4 t ADT: 50

K60 INDIAN AVE

Good

Over: TOM CREEK

100443002, Lyon, IA

Built 2022 Load: 32.4 t ADT: 279

LOCAL ROAD

Good

Over: KANARANZI CREEK

100451103, Lyon, IA

Built 2010 Load: 32.4 t ADT: 62

140TH ST

Good

Over: TOM CREEK

100453601, Lyon, IA

Built 2017 Load: 32.4 t ADT: 33

110TH ST

Good

Over: TOOLE CREEK

100461801, Lyon, IA

Built 2017 Load: 32.4 t ADT: 72

CHERRY AVE

Good

Over: SMALL STREAM

100470702, Lyon, IA

Built 2015 Load: 32.4 t ADT: 30

LOCAL ROAD

Good

Over: SMALL STREAM

100472502, Lyon, IA

Built 1994 Load: 32.4 t ADT: 50

LOCAL ROAD

Good

Over: CREEK

099451302, Lyon, IA

Built 1990 Load: 32.4 t ADT: 26

LOCAL ROAD

Good

Over: CREEK

100433102, Lyon, IA

Built 1989 Load: 32.4 t ADT: 35

COOLIDGE AVE

Good

Over: SMALL

098470302, Lyon, IA

Built 1993 Load: 32.4 t ADT: 100

LOCAL

Good

Over: SMALL

100433102, Lyon, IA

Built 1989 Load: 32.4 t ADT: 35

140TH ST

Good

Over: CREEK

100443601, Lyon, IA

Built 1989 Load: 32.4 t ADT: 30

JAY AVE

Good

Over: STREAM

098442202, Lyon, IA

Built 2013 Load: 32.4 t ADT: 15

DOGWOOD AVE

Good

Over: SMALL STREAM

100472402, Lyon, IA

Built 2015 Load: 32.4 t ADT: 50

FM

Good

Over: WEST RAT CREEK

098430101, Lyon, IA

Built 2007 Load: 32.7 t ADT: 578

LOCAL

Good

Over: OVER FLOW

0984623, Lyon, IA

Built 2004 Load: 32.7 t ADT: 62

LOCAL RD

Good

Over: ARGO SLOUGH

099431201, Lyon, IA

Built 2003 Load: 32.7 t ADT: 35

LOCAL ROAD

Good

Over: TAFT CREEK

099432701, Lyon, IA

Built 1992 Load: 32.7 t ADT: 26

LOCAL ROAD

Good

Over: ZOAR CREEK

099433402, Lyon, IA

Built 1992 Load: 32.7 t ADT: 46

FM

Good

Over: EMERY CREEK

099442001, Lyon, IA

Built 1978 Load: 32.7 t ADT: 40

LOCAL ROAD

Good

Over: TURNER CREEK

100441101, Lyon, IA

Built 2006 Load: 32.7 t ADT: 62

LOCAL ROAD

Good

Over: SMALL STREAM

100450902, Lyon, IA

Built 1989 Load: 32.7 t ADT: 26

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