Total bridges
234
Public highway bridges in Lyon County
County profile · official public datasets
Lyon County, MN
234 public highway bridges tracked in the FHWA National Bridge Inventory: 75.2% rated Good, 21.8% Fair, 3% Poor.
- 234
- Public bridges
- 75.2%
- Good condition
- 3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lyon County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 43%
- lowest Poor share in state
- 3%
- Poor-condition share
- 234
- public highway bridges
- 1983
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Lyon County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lyon County ranks #37 of 87 Minnesota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3%). Lyon County, Minnesota contains 234 public highway bridges. Roughly 75.2% are rated “Good,” 21.8% “Fair,” and 3% “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.
Good condition
75.2%
176 of 234 rated 7-9
Fair condition
21.8%
51 of 234 rated 5-6
Poor condition
3%
7 of 234 rated 4 or below
In-state Poor-share rank
#37 of 87
Among Minnesota counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 234 NBI-tracked bridges by lowest applicable component rating.
Good 75.2% (176)
Fair 21.8% (51)
Poor 3% (7)
Lyon County's Poor-condition bridges carry 3,476 vehicle crossings a day
That is 2.3% of the county's reported daily bridge traffic on 3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 497 crossings a day against 378 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 234 of 234 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
25.2% of Lyon County's bridges have passed the 50-year mark
59 of the 234 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 75.2% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 79.5% of the county's Poor-condition bridge traffic
MN 23 over REDWOOD RIVER, built 1937, carries 2,763 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 7-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,476 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lyon County's bridges were built
234 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 5
1920–1929
5 bridges
- 1930s 10
1930–1939
10 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 8
1950–1959
8 bridges
- 1960s 16
1960–1969
16 bridges
- 1970s
1970–1979
30 bridges
- 1980s
1980–1989
74 bridges
- 1990s
1990–1999
39 bridges
- 2000s 29
2000–2009
29 bridges
- 2010s 17
2010–2019
17 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1980s, when 74 of the county's bridges still in the inventory were built, which is 31.6% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1983) matches the Minnesota average (1986).
How Lyon County compares with Minnesota's closest counties by inventory size
The 5 Minnesota counties nearest Lyon County in number of bridges, with their condition splits. Its 3% Poor share is the 3rd-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1983 is in line with the group.
Showing the 5 closest of 86 Minnesota counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Winona County | 237 | 43% | 52.3% | 4.6% | 1982 |
| Lyon County (this page) | 234 | 75.2% | 21.8% | 3% | 1983 |
| Stearns County | 229 | 54.6% | 42.8% | 2.6% | 1981 |
| Faribault County | 226 | 50.9% | 44.7% | 4.4% | 1986 |
| Clay County | 225 | 53.8% | 40.4% | 5.8% | 1984 |
| Yellow Medicine County | 218 | 67.4% | 29.8% | 2.8% | 1984 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Lyon County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Lyon County, both outside Minnesota so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MN (234 bridges here).
- Prince of Wales-Hyder County, AK · 234 bridges
- Morgan County, IL · 234 bridges
- Jackson County, NC · 234 bridges
- Eastland County, TX · 234 bridges
Similar average build year
Nearest mean year-built outside MN (1983 here).
- Dallas County, TX · avg 1983 · 3,230 bridges
- Bexar County, TX · avg 1983 · 2,342 bridges
- Sedgwick County, KS · avg 1983 · 1,333 bridges
- Will County, IL · avg 1983 · 649 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (51)
CSAH 10
FairOver: STREAM
0.4 MI W OF JCT CSAH 3, Lyon, MN
Built 1963 Load: 7.0 t ADT: 445
CSAH 25
FairOver: REDWOOD RIVER
1.7 MI SW OF JCT CSAH 5, Lyon, MN
Built 1975 Load: 16.3 t ADT: 218
T 95
FairOver: REDWOOD RIVER
0.5 MI W OF JCT TH 23, Lyon, MN
Built 1974 Load: 19.6 t ADT: 48
CR 60
FairOver: REDWOOD RIVER
0.7 MI E OF JCT TH 23, Lyon, MN
Built 1956 Load: 21.5 t ADT: 37
T 26
FairOver: BIG COTTONWOOD RIVER
1.5 MI W OF JCT TH 59, Lyon, MN
Built 1925 Load: 21.9 t ADT: 13
SPR 7
FairOver: LOW WATER CROSSING
IN CAMDEN STATE PARK, Lyon, MN
Built 2005 Load: 22.7 t ADT: 20
CSAH 31
FairOver: REDWOOD RIVER
0.5 MI W OF RUSSELL, Lyon, MN
Built 1936 Load: 22.9 t ADT: 462
CSAH 3
FairOver: N BR YELLOW MEDICINE R
1.5 MI N OF JCT CSAH 26, Lyon, MN
Built 1958 Load: 23.3 t ADT: 420
T 421
FairOver: REDWOOD RIVER
0.9 MI S OF JCT TH 19, Lyon, MN
Built 1958 Load: 23.5 t ADT: 12
SPR 4
FairOver: BNSF RR
0.6 MI NW OF JCT TH 23, Lyon, MN
Built 1972 Load: 23.5 t ADT: 150
CSAH 11
FairOver: BIG COTTONWOOD RIVER
0.6 MI S OF JCT CSAH 2, Lyon, MN
Built 1964 Load: 26.1 t ADT: 960
MN 19
FairOver: REDWOOD RIVER
0.2 MI NE OF JCT TH 59, Lyon, MN
Built 1931 Load: 26.2 t ADT: 8,800
CSAH 13
FairOver: S BR YELLOW MEDICINE R
2.3 MI N OF JCT TH 19, Lyon, MN
Built 1967 Load: 26.8 t ADT: 65
CSAH 13
FairOver: S BR YELLOW MEDICINE R
0.2 MI N OF JCT TH 19, Lyon, MN
Built 1967 Load: 26.8 t ADT: 65
MN 19
FairOver: REDWOOD R DIVERSION CHAN
1.3 MI SW OF JCT TH 59, Lyon, MN
Built 1962 Load: 27.1 t ADT: 2,900
MN 19
FairOver: REDWOOD RIVER
0.7 MI SW OF MARSHALL, Lyon, MN
Built 1932 Load: 27.4 t ADT: 2,900
T 127
FairOver: S BR YELLOW MEDICINE R
0.8 MI S OF JCT TH 19, Lyon, MN
Built 1925 Load: 28.1 t ADT: 29
T 31
FairOver: S BR YELLOW MEDICINE R
0.1 MI N OF JCT CSAH 10, Lyon, MN
Built 1958 Load: 28.4 t ADT: 65
CR 74
FairOver: REDWOOD RIVER
0.2 MI W OF JCT TH 23, Lyon, MN
Built 1969 Load: 29.0 t ADT: 298
MN 19
FairOver: STREAM
8.6 MI W OF MARSHALL, Lyon, MN
Built 1919 Load: 29.4 t ADT: 1,450
MN 19
FairOver: THREE MILE CREEK
7.0 MI W OF MARSHALL, Lyon, MN
Built 1937 Load: 29.4 t ADT: 1,450
US 14
FairOver: REDWOOD RIVER
2.0 MI E OF FLORENCE, Lyon, MN
Built 1928 Load: 29.4 t ADT: 1,064
US 59
FairOver: STREAM
8.3 MI SE OF MARSHALL, Lyon, MN
Built 1934 Load: 29.4 t ADT: 2,597
US 59
FairOver: DITCH
4.7 MI SE OF MARSHALL, Lyon, MN
Built 1934 Load: 29.4 t ADT: 2,597
US 59
FairOver: COTTONWOOD RIVER
13.5 MI S OF MARSHALL, Lyon, MN
Built 1941 Load: 29.4 t ADT: 2,597
US 59
FairOver: REDWOOD RIVER
ON MAIN ST IN MARSHALL, Lyon, MN
Built 1950 Load: 29.4 t ADT: 9,500
MN 19
FairOver: REDWOOD RIVER
0.1 MI SW OF JCT 59, Lyon, MN
Built 1975 Load: 29.4 t ADT: 8,300
T 21
FairOver: BIG COTTONWOOD RIVER
2.7 MI S OF JCT CSAH 2, Lyon, MN
Built 1974 Load: 29.8 t ADT: 21
CSAH 8
FairOver: THREE MILE CREEK
1.5 MI W OF JCT CSAH 9, Lyon, MN
Built 1962 Load: 30.2 t ADT: 165
US 59
FairOver: REDWOOD R DIVERSION CHAN
0.5 MI N OF JCT TH 68, Lyon, MN
Built 1962 Load: 30.7 t ADT: 5,200
CSAH 7
FairOver: STREAM
1.5 MI S OF JCT TH 14, Lyon, MN
Built 1966 Load: 30.8 t ADT: 205
T 302
FairOver: STREAM
1.1 MI W OF JCT CR 65, Lyon, MN
Built 1974 Load: 30.8 t ADT: 15
US 59
FairOver: THREE MILE CREEK
8.5 MI N OF MARSHALL, Lyon, MN
Built 1952 Load: 31.0 t ADT: 1,650
CSAH 11
FairOver: REDWOOD RIVER
0.5 MI S OF JCT CSAH 8, Lyon, MN
Built 1971 Load: 31.2 t ADT: 179
T 176
FairOver: STREAM
1.5 MI N OF JCT TH 14, Lyon, MN
Built 1969 Load: 31.7 t ADT: 45
CSAH 8
FairOver: THREE MILE CREEK
0.2 MI W OF JCT CR 65, Lyon, MN
Built 1973 Load: 32.5 t ADT: 435
CR 65
FairOver: THREE MILE CREEK
0.6 MI N OF JCT CSAH 8, Lyon, MN
Built 1970 Load: 33.1 t ADT: 26
CSAH 5
FairOver: THREE MILE CREEK
0.6 MI S OF JCT CR 76, Lyon, MN
Built 1958 Load: 33.3 t ADT: 340
CSAH 9
FairOver: MEADOW CREEK
0.2 MI S OF JCT CR 72, Lyon, MN
Built 1923 Load: 33.3 t ADT: 451
CR 64
FairOver: STREAM
0.2 MI E OF JCT CSAH 11, Lyon, MN
Built 1964 Load: 33.5 t ADT: 20
MN 23
FairOver: REDWOOD RIVER
4.3 MI N OF E JCT TH19, Lyon, MN
Built 1973 Load: 33.7 t ADT: 5,204
MN 23
FairOver: THREE MILE CREEK
5.9 MI N OF JCT TH 19, Lyon, MN
Built 1973 Load: 34.6 t ADT: 4,677
CSAH 33
FairOver: BNSF RR
0.6 MI E OF JCT TH 59, Lyon, MN
Built 1983 Load: 34.6 t ADT: 4,014
CR 66
FairOver: COON CREEK
0.5 MI N OF JCT CR 66, Lyon, MN
Built 1970 Load: 35.1 t ADT: 25
MN 68
FairOver: REDWOOD R DIVERSION CHAN
0.6 MI NW OF JCT TH 59, Lyon, MN
Built 1962 Load: 36.6 t ADT: 3,810
T 172
FairOver: THREE MILE CREEK
0.4 MI S OF JCT TH 19, Lyon, MN
Built 1987 Load: 39.2 t ADT: 16
MN 23
FairOver: REDWOOD RIVER
0.2 MI SW OF JCT TH91, Lyon, MN
Built 1971 Load: 40.4 t ADT: 3,480
MN 19
FairOver: S BR YELLOW MEDICINE R
13.3 MI W OF MARSHALL, Lyon, MN
Built 1936 Load: 41.2 t ADT: 1,450
MSAS 111
FairOver: REDWOOD RIVER
0.1 MI W OF JCT TH 19, Lyon, MN
Built 1971 Load: 43.6 t ADT: 3,600
CR 87
FairOver: THREE MILE CREEK
1.4 MI S OF JCT TH 19, Lyon, MN
Built 1941 Load: 47.0 t ADT: 145
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.