Total bridges
97
Public highway bridges in Swift County
County profile · official public datasets
Swift County, MN
97 public highway bridges tracked in the FHWA National Bridge Inventory: 75.3% rated Good, 23.7% Fair, 1% Poor.
- 97
- Public bridges
- 75.3%
- Good condition
- 1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Swift County pairs a top-10% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 8%
- lowest Poor share in state
- 1%
- Poor-condition share
- 97
- public highway bridges
- 1993
- 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.
Swift County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Swift County ranks #7 of 87 Minnesota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1%). Swift County, Minnesota contains 97 public highway bridges. Roughly 75.3% are rated “Good,” 23.7% “Fair,” and 1% “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
75.3%
73 of 97 rated 7-9
Fair condition
23.7%
23 of 97 rated 5-6
Poor condition
1%
1 of 97 rated 4 or below
In-state Poor-share rank
#7 of 87
Among Minnesota counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 97 NBI-tracked bridges by lowest applicable component rating.
Good 75.3% (73)
Fair 23.7% (23)
Poor 1% (1)
Swift County's Poor-condition bridges carry 1 vehicle crossings a day
That is 0% of the county's reported daily bridge traffic on 1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1 crossings a day against 395 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 97 of 97 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
10.3% of Swift County's bridges have passed the 50-year mark
10 of the 97 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 75.3% 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 100% of the county's Poor-condition bridge traffic
T 312 over SHAKOPEE CREEK, built 1924, carries 1 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 1-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Swift County's bridges were built
97 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1950s 1
1950–1959
1 bridges
- 1960s 3
1960–1969
3 bridges
- 1970s
1970–1979
14 bridges
- 1980s
1980–1989
19 bridges
- 1990s
1990–1999
23 bridges
- 2000s
2000–2009
14 bridges
- 2010s
2010–2019
16 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1990s, when 23 of the county's bridges still in the inventory were built, which is 23.7% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1993, 7 years newer than the Minnesota average of 1986.
How Swift County compares with Minnesota's closest counties by inventory size
The 5 Minnesota counties nearest Swift County in number of bridges, with their condition splits. Its 1% Poor share is the 2nd-lowest of these 6. Its average build year of 1993 against a peer-group mean of 1987 is 6 years newer.
Showing the 5 closest of 86 Minnesota counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Sibley County | 102 | 61.8% | 37.3% | 1% | 1994 |
| Beltrami County | 101 | 63.4% | 33.7% | 3% | 1989 |
| Koochiching County | 98 | 54.1% | 38.8% | 7.1% | 1987 |
| Swift County (this page) | 97 | 75.3% | 23.7% | 1% | 1993 |
| Aitkin County | 96 | 55.2% | 36.5% | 8.3% | 1985 |
| Kandiyohi County | 94 | 48.9% | 43.6% | 7.4% | 1980 |
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 Swift 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 Swift County, both outside Minnesota so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MN (97 bridges here).
- Forsyth County, GA · 97 bridges
- Elmore County, ID · 97 bridges
- Mason County, KY · 97 bridges
- Madison County, MT · 97 bridges
Similar average build year
Nearest mean year-built outside MN (1993 here).
- Salt Lake County, UT · avg 1993 · 659 bridges
- Marshall County, MS · avg 1993 · 255 bridges
- Rowan County, NC · avg 1993 · 245 bridges
- Cabarrus County, NC · avg 1993 · 236 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (23)
T 377
FairOver: MUD CREEK
2.0 MI NE OF JCT TH12, Swift, MN
Built 1958 Load: 12.6 t ADT: 12
T 99
FairOver: DITCH
0.1 MI W OF JCT CR65, Swift, MN
Built 1967 Load: 18.4 t ADT: 15
CSAH 33
FairOver: MUD CREEK
0.1 MI N OF JCT CSAH28, Swift, MN
Built 1964 Load: 20.8 t ADT: 190
T 201
FairOver: SHAKOPEE CREEK
0.7 MI N OF JCT CSAH 6, Swift, MN
Built 1980 Load: 29.2 t ADT: 20
US 12
FairOver: SHAKOPEE CREEK
1.2 MI SE OF JCT CSAH 6, Swift, MN
Built 1977 Load: 29.4 t ADT: 3,950
CSAH 28
FairOver: MUD CREEK
0.1 MI W OF JCT CSAH33, Swift, MN
Built 1964 Load: 29.8 t ADT: 80
US 59
FairOver: POMME DE TERRE RIVER
2.1 MI NE OF N JCT TH 7, Swift, MN
Built 1971 Load: 30.7 t ADT: 1,627
MN 29
FairOver: JD #5
3.5 MI S OF BENSON, Swift, MN
Built 2014 Load: 32.4 t ADT: 1,200
CSAH 8
FairOver: JUD DITCH # 8
0.5 MI W OF JCT CSAH17, Swift, MN
Built 1920 Load: 32.4 t ADT: 80
CSAH 35
FairOver: SHAKOPEE CREEK
0.1 MI N OF S CO LINE, Swift, MN
Built 1981 Load: 35.9 t ADT: 250
CSAH 38
FairOver: STREAM
0.8 MI E OF JCT TH 59, Swift, MN
Built 1984 Load: 35.9 t ADT: 75
T 2
FairOver: DRY WOOD CREEK
1.8 MI N OF JCT CSAH 22, Swift, MN
Built 1981 Load: 35.9 t ADT: 15
T 42
FairOver: DRY WOOD CREEK
1.8 MI N OF JCT CSAH 22, Swift, MN
Built 1977 Load: 35.9 t ADT: 25
T 209
FairOver: CO DITCH # 3
0.5 MI E OF JCT CR 75, Swift, MN
Built 1978 Load: 35.9 t ADT: 10
T 146
FairOver: SHAKOPEE CREEK (JD #19)
1.2 MI S OF JCT CSAH 35, Swift, MN
Built 1985 Load: 35.9 t ADT: 68
T 123
FairOver: SHAKOPEE CREEK (CD #18)
1.6 MI W OF JCT CSAH 39, Swift, MN
Built 1990 Load: 35.9 t ADT: 60
T 99
FairOver: POMME DE TERRE RIVER
1.7 MI NE OF JCT TH 7, Swift, MN
Built 1982 Load: 38.4 t ADT: 35
T 141
FairOver: MUD CREEK
1.3 MI N OF JCT CSAH 28, Swift, MN
Built 1987 Load: 39.2 t ADT: 30
T 229
FairOver: JUD DITCH # 8
0.7 MI S OF JCT CSAH 8, Swift, MN
Built 1989 Load: 39.2 t ADT: 30
M 51
FairOver: POMME DE TERRE RIVER
0.4 MI S OF JCT TH 59, Swift, MN
Built 1978 Load: 41.6 t ADT: 900
MN 9
FairOver: CHIPPEWA RIVER
0.7 MI NW OF JCT TH 29, Swift, MN
Built 1984 Load: 47.3 t ADT: 2,539
MN 119
FairOver: MINNESOTA RIVER OVERFLOW
3.3 MI S OF JCT TH 7, Swift, MN
Built 1977 Load: 48.0 t ADT: 1,409
MN 119
FairOver: MINNESOTA RIVER
3.5 MI S OF JCT TH 7, Swift, MN
Built 1977 Load: 52.1 t ADT: 1,409
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.