T 15 over Big Slough
FairBlue Earth County, Minnesota · 0.6 MI S of JCT CR 154 · Structure no. 91774
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected December 2024
- Type
- Culvert
- Concrete
- Length
- 48 ft
- 3 main spans
- Daily traffic
- 16
- 1969 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
T 15 over Big Slough is a concrete culvert carrying T 15 over Big Slough in Blue Earth County, Minnesota. It was built in 1978, so it is 47 years old, older than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 16 vehicles a day, projected to reach 16 by 2029. The structure is 48 ft (14.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T 15 over Big Slough built?
It was built in 1978, making it 47 years old in 2025.
What condition is T 15 over Big Slough in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.
How much traffic does T 15 over Big Slough carry?
About 16 vehicles per day (1969 count).
How long is T 15 over Big Slough?
The structure is 48 ft (14.6 m) long with a longest span of 13 ft (3.9 m).
Who owns T 15 over Big Slough?
It is owned by the Town or Township Highway Agency.