Total bridges
96
Public highway bridges in Aitkin County
County profile · official public datasets
Aitkin County, MN
96 public highway bridges tracked in the FHWA National Bridge Inventory: 55.2% rated Good, 36.5% Fair, 8.3% Poor.
- 96
- Public bridges
- 55.2%
- Good condition
- 8.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Aitkin County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 78th
- of 87 on Poor share
- 8.3%
- Poor-condition share
- 96
- public highway bridges
- 1985
- 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.
Aitkin County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Aitkin County ranks #78 of 87 Minnesota counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.3%). Aitkin County, Minnesota contains 96 public highway bridges. Roughly 55.2% are rated “Good,” 36.5% “Fair,” and 8.3% “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
55.2%
53 of 96 rated 7-9
Fair condition
36.5%
35 of 96 rated 5-6
Poor condition
8.3%
8 of 96 rated 4 or below
In-state Poor-share rank
#78 of 87
Among Minnesota counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 96 NBI-tracked bridges by lowest applicable component rating.
Good 55.2% (53)
Fair 36.5% (35)
Poor 8.3% (8)
Aitkin County's Poor-condition bridges carry 1,731 vehicle crossings a day
That is 1.6% of the county's reported daily bridge traffic on 8.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 216 crossings a day against 1,130 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 96 of 96 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
26% of Aitkin County's bridges have passed the 50-year mark
25 of the 96 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 55.2% 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 42.2% of the county's Poor-condition bridge traffic
CSAH 22 over WAKEFIELD BROOK, built 1960, carries 730 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 8-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,731 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Aitkin County's bridges were built
96 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s 6
1930–1939
6 bridges
- 1950s 6
1950–1959
6 bridges
- 1960s 6
1960–1969
6 bridges
- 1970s
1970–1979
15 bridges
- 1980s
1980–1989
19 bridges
- 1990s
1990–1999
10 bridges
- 2000s
2000–2009
22 bridges
- 2010s 7
2010–2019
7 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 2000s, when 22 of the county's bridges still in the inventory were built, which is 22.9% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1985) matches the Minnesota average (1986).
How Aitkin County compares with Minnesota's closest counties by inventory size
The 5 Minnesota counties nearest Aitkin County in number of bridges, with their condition splits. Its 8.3% Poor share is the 6th-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1989 is in line with the group.
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 | 97 | 75.3% | 23.7% | 1% | 1993 |
| Aitkin County (this page) | 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 Aitkin 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 Aitkin County, both outside Minnesota so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MN (96 bridges here).
- Del Norte County, CA · 96 bridges
- Routt County, CO · 96 bridges
- Blaine County, ID · 96 bridges
- Clare County, MI · 96 bridges
Similar average build year
Nearest mean year-built outside MN (1985 here).
- Hillsborough County, FL · avg 1985 · 840 bridges
- Lancaster County, NE · avg 1985 · 661 bridges
- Nueces County, TX · avg 1985 · 528 bridges
- Grayson County, TX · avg 1985 · 513 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (96)
T 64
FairOver: RIPPLE RIVER
1.0 MI W;S OF JCT CR 51, Aitkin, MN
Built 1979 Load: 26.1 t ADT: 8
M 36
FairOver: RIPPLE RIVER
0.1 MI S OF JCT TH 169, Aitkin, MN
Built 1930 Load: 26.1 t ADT: 150
CSAH 2
FairOver: SNAKE RIVER
0.8 MI W OF JCT TH 65, Aitkin, MN
Built 1958 Load: 26.8 t ADT: 418
CSAH 28
FairOver: RIPPLE RIVER
1.4 MI E OF JCT TH 169, Aitkin, MN
Built 1978 Load: 28.1 t ADT: 1,050
CSAH 23
FairOver: CHAN BETWEEN TWO LAKES
0.5 MI W OF JCT CSAH 38, Aitkin, MN
Built 1983 Load: 28.1 t ADT: 185
CSAH 2
FairOver: STREAM
1.7 MI W OF JCT TH 65, Aitkin, MN
Built 1958 Load: 28.1 t ADT: 418
CSAH 1
FairOver: MISSISSIPPI RIVER
0.5 MI N OF JCT TH 210, Aitkin, MN
Built 1970 Load: 28.8 t ADT: 1,143
CR 54
FairOver: RIPPLE RIVER
0.3 MI E OF JCT CSAH 1, Aitkin, MN
Built 1986 Load: 29.0 t ADT: 658
CR 54
FairOver: SISSABAGAMAH CREEK
3.0 MI E OF AITKIN, Aitkin, MN
Built 1950 Load: 29.0 t ADT: 79
US 169
FairOver: RIPPLE RIVER
0.2 MI S OF JCT TH 47, Aitkin, MN
Built 1931 Load: 29.4 t ADT: 5,627
US 169
FairOver: CHAN BETWEEN TWO LAKES
6.2 MI S OF JCT TH 47, Aitkin, MN
Built 1936 Load: 29.4 t ADT: 2,851
MN 65
FairOver: SNAKE RIVER
8.7 MI N OF JCT TH 18, Aitkin, MN
Built 1937 Load: 29.4 t ADT: 1,857
MN 210
FairOver: SANDY RIVER
4.3 MI E OF E JCT TH 65, Aitkin, MN
Built 1930 Load: 29.4 t ADT: 2,575
MN 65
FairOver: STREAM
10.0 MI N OF JCT TH 232, Aitkin, MN
Built 1951 Load: 29.4 t ADT: 1,269
US 169
FairOver: WILLOW RIVER
6.1 MI S OF JCTTH 200, Aitkin, MN
Built 1980 Load: 29.4 t ADT: 2,485
US 169
FairOver: RIPPLE RIVER
0.3 MI S OF S JCT TH 210, Aitkin, MN
Built 1929 Load: 31.7 t ADT: 8,300
CR 61
FairOver: CHESLEY BROOK
0.8 MI W OF JCT CSAH 23, Aitkin, MN
Built 1972 Load: 32.4 t ADT: 27
T 224
FairOver: WILLOW RIVER
1.0 MI E OF JCT TH 169, Aitkin, MN
Built 1969 Load: 33.3 t ADT: 7
T 30
FairOver: SNAKE RIVER
0.1 MI W OF JCT TH 65, Aitkin, MN
Built 1976 Load: 34.6 t ADT: 5
T 518
FairOver: PRAIRIE RIVER
0.4 MI N OF JCT CR 64, Aitkin, MN
Built 1980 Load: 34.6 t ADT: 1
CR 67
FairOver: WILLOW RIVER
0.1 MI E OF JCT CSAH 68, Aitkin, MN
Built 1971 Load: 34.6 t ADT: 96
T 148
FairOver: SISSABAGAMAH CREEK
1.2 MI W OF JCT CSAH 5, Aitkin, MN
Built 1979 Load: 35.9 t ADT: 29
CSAH 1
FairOver: LITTLE WILLOW RIVER
4.1 MI S OF JCT CSAH 3, Aitkin, MN
Built 1985 Load: 35.9 t ADT: 123
CSAH 5
FairOver: SISSABAGAMAH CREEK
0.2 MI N OF JCT TH 47, Aitkin, MN
Built 1995 Load: 35.9 t ADT: 281
CSAH 2
FairOver: SNAKE RIVER
2.4 MI E OF JCT TH 65, Aitkin, MN
Built 1992 Load: 35.9 t ADT: 319
UT 22
FairOver: STREAM
1.2 MI N OF JCT CSAH 2, Aitkin, MN
Built 1987 Load: 35.9 t ADT: 10
MN 65
FairOver: SANDY RIVER
8.0 MI N OF JCT TH 210, Aitkin, MN
Built 2005 Load: 36.0 t ADT: 2,420
T 1488
FairOver: SPLIT ROCK RIVER
0.6 MI S OF JCT CR 75, Aitkin, MN
Built 1972 Load: 38.5 t ADT: 8
CSAH 29
FairOver: MOOSE RIVER
1.2 MI S OF JCT CSAH 19, Aitkin, MN
Built 2005 Load: 39.2 t ADT: 46
MN 65
FairOver: SNAKE RIVER
2.4 MI N OF JCT TH 18, Aitkin, MN
Built 1996 Load: 40.0 t ADT: 1,857
MN 65
FairOver: SANDY RIVER
12.8 MI N OF W JCT TH 21, Aitkin, MN
Built 2005 Load: 41.5 t ADT: 1,269
CR 62
FairOver: SANDY RIVER
2.3 MI N OF JCT TH 210, Aitkin, MN
Built 2021 Load: 43.1 t ADT: 444
MN 200
FairOver: Mississippi River
0.2 mi W of JCT TH 65, Aitkin, MN
Built 2002 Load: 46.0 t ADT: 1,450
MN 65
FairOver: Sandy River
1.3 MI N OF JCT TH 210, Aitkin, MN
Built 2000 Load: 47.0 t ADT: 5,300
CSAH 12
FairOver: RIPPLE RIVER
5.5 MI S OF JCT TH 47, Aitkin, MN
Built 2021 Load: 48.0 t ADT: 540
RICE LAKE ROAD
GoodOver: RICE RIVER
SEC 10 T47N R24W, Aitkin, MN
Built 1952 Load: 18.1 t ADT: 1
SERVICE ROAD
GoodOver: RICE LAKE DITCH
SEC 25 T47N R24W, Aitkin, MN
Built 1979 Load: 18.1 t ADT: 10
MN 200
GoodOver: LITTLE HILL RIVER
4.7 MI W OF HILL CITY, Aitkin, MN
Built 1936 Load: 29.4 t ADT: 1,118
MN 47
GoodOver: PETERSON CREEK
6.0 MI S OF MALMO, Aitkin, MN
Built 1967 Load: 29.4 t ADT: 1,361
US 169
GoodOver: HILL RIVER
0.5 MI S OF JCT TH 200, Aitkin, MN
Built 1980 Load: 29.4 t ADT: 2,877
US 169
GoodOver: MORRISON BROOK
0.1 MI S OF JCT TH 200, Aitkin, MN
Built 1983 Load: 29.4 t ADT: 2,877
US 169
GoodOver: HILL RIVER (CD #37)
2.7 MI S OF JCT TH 200, Aitkin, MN
Built 1980 Load: 29.4 t ADT: 2,485
MN 200
GoodOver: MORRISON BROOK
0.1 MI W OF JCT TH 169, Aitkin, MN
Built 1983 Load: 29.4 t ADT: 1,095
US 169
GoodOver: MOOSE RIVER
7.4 MI S OF JCT TH 200, Aitkin, MN
Built 1985 Load: 29.4 t ADT: 2,485
MN 65
GoodOver: SWAN RIVER
0.6 MI N OF N JCT TH 200, Aitkin, MN
Built 1986 Load: 29.4 t ADT: 1,167
US 169
GoodOver: MISSISSIPPI RIVER
2.9 MI N OF N JCT TH 210, Aitkin, MN
Built 1990 Load: 30.0 t ADT: 2,380
CSAH 15
GoodOver: CEDAR CREEK
4.4 MI W OF AITKIN, Aitkin, MN
Built 2017 Load: 32.4 t ADT: 265
MN 210
GoodOver: SISSABAGAMAH CREEK
3.0 MI NE OF AITKIN, Aitkin, MN
Built 2017 Load: 32.4 t ADT: 4,754
MN 47
GoodOver: MORMON BROOK
1.1 MI N OF JCT TH 18, Aitkin, MN
Built 2019 Load: 32.4 t ADT: 1,008
MN 200
GoodOver: HILL LAKE CHANNEL
0.8 MI E OF JCT TH 169, Aitkin, MN
Built 1976 Load: 33.0 t ADT: 1,084
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.