Mn 13 over NB TH 77
FairDakota County, Minnesota · At the JCT TH 77; 13 · Structure no. 19056
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 369 ft
- 4 main spans
- Daily traffic
- 11,600
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 13 over NB TH 77 is a prestressed concrete stringer/multi-beam or girder carrying Mn 13 over NB TH 77 in Dakota 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 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 11,600 vehicles a day, roughly 3% of them trucks, projected to reach 10,850 by 2039. The structure is 369 ft (112.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 13 over NB TH 77 built?
It was built in 1978, making it 47 years old in 2025.
What condition is Mn 13 over NB TH 77 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 April 2023.
How much traffic does Mn 13 over NB TH 77 carry?
About 11,600 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is Mn 13 over NB TH 77?
The structure is 369 ft (112.6 m) long with a longest span of 108 ft (33 m) and a deck 55 ft wide.
Who owns Mn 13 over NB TH 77?
It is owned by the State Highway Agency.