Mn 30 over Maple River
FairBlue Earth County, Minnesota · 7.0 MI E of Amboy · Structure no. 6797
- Built
- 1953
- 72 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 113 ft
- 3 main spans
- Daily traffic
- 1,274
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 30 over Maple River is a steel stringer/multi-beam or girder carrying Mn 30 over Maple River in Blue Earth County, Minnesota. It was built in 1953, so it is 72 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 5 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 1,274 vehicles a day, roughly 9% of them trucks, projected to reach 1,150 by 2041. The structure is 113 ft (34.4 m) long and 50 ft wide. If it were closed, the detour would be 6.8 mi (11 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 30 over Maple River built?
It was built in 1953, making it 72 years old in 2025.
What condition is Mn 30 over Maple River 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 June 2024.
How much traffic does Mn 30 over Maple River carry?
About 1,274 vehicles per day (2021 count), of which roughly 9% are trucks.
How long is Mn 30 over Maple River?
The structure is 113 ft (34.4 m) long with a longest span of 37 ft (11.4 m) and a deck 50 ft wide.
Who owns Mn 30 over Maple River?
It is owned by the State Highway Agency.