Mn 78 over I 94
FairGrant County, Minnesota · At JCT TH 78 · Structure no. 26802
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 255 ft
- 4 main spans
- Daily traffic
- 1,050
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 78 over I 94 is a prestressed concrete stringer/multi-beam or girder carrying Mn 78 over I 94 in Grant County, Minnesota. It was built in 1963, so it is 62 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 1,050 vehicles a day, roughly 11% of them trucks, projected to reach 1,100 by 2038. The structure is 255 ft (77.8 m) long and 35 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 78 over I 94 built?
It was built in 1963, making it 62 years old in 2025.
What condition is Mn 78 over I 94 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 October 2024.
How much traffic does Mn 78 over I 94 carry?
About 1,050 vehicles per day (2018 count), of which roughly 11% are trucks.
How long is Mn 78 over I 94?
The structure is 255 ft (77.8 m) long with a longest span of 79 ft (24.2 m) and a deck 35 ft wide.
Who owns Mn 78 over I 94?
It is owned by the State Highway Agency.