I-77 Nbl over Mitchell River
FairSurry County, North Carolina · .7 MI.N.JCT.SR1131 · Structure no. 000000001710121
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 301 ft
- 5 main spans
- Daily traffic
- 13,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
I-77 Nbl over Mitchell River is a prestressed concrete stringer/multi-beam or girder carrying I-77 Nbl over Mitchell River in Surry County, North Carolina. It was built in 1974, so it is 51 years old, older than the North Carolina average of 38.7 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 13,000 vehicles a day, roughly 23% of them trucks, projected to reach 26,000 by 2040. The structure is 301 ft (91.7 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-77 Nbl over Mitchell River built?
It was built in 1974, making it 51 years old in 2025.
What condition is I-77 Nbl over Mitchell 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 September 2023.
How much traffic does I-77 Nbl over Mitchell River carry?
About 13,000 vehicles per day (2020 count), of which roughly 23% are trucks.
How long is I-77 Nbl over Mitchell River?
The structure is 301 ft (91.7 m) long with a longest span of 57 ft (17.3 m) and a deck 42 ft wide.
Who owns I-77 Nbl over Mitchell River?
It is owned by the State Highway Agency.