T 397 over Mud River
GoodMarshall County, Minnesota · 0.4 MI N of JCT TH 89 · Structure no. 45545
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected October 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 87 ft
- 3 main spans
- Daily traffic
- 40
- 1994 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
T 397 over Mud River is a prestressed concrete tee beam carrying T 397 over Mud River in Marshall County, Minnesota. It was built in 1990, so it is 35 years old, younger than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 40 vehicles a day, projected to reach 40 by 2029. The structure is 87 ft (26.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T 397 over Mud River built?
It was built in 1990, making it 35 years old in 2025.
What condition is T 397 over Mud River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.
How much traffic does T 397 over Mud River carry?
About 40 vehicles per day (1994 count).
How long is T 397 over Mud River?
The structure is 87 ft (26.5 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.
Who owns T 397 over Mud River?
It is owned by the Town or Township Highway Agency.