US21 over I77
FairIredell County, North Carolina · 0.1 Mi. W. Jct. SR1246 · Structure no. 000000000970049
- Built
- 1966
- 59 years old, rebuilt 2005
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 283 ft
- 4 main spans
- Daily traffic
- 26,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US21 over I77 is a steel stringer/multi-beam or girder carrying US21 over I77 in Iredell County, North Carolina. It was built in 1966 and reconstructed in 2005, so it is 59 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 26,000 vehicles a day, roughly 6% of them trucks, projected to reach 52,000 by 2040. The structure is 283 ft (86.2 m) long and 57 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US21 over I77 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2005.
What condition is US21 over I77 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 January 2024.
How much traffic does US21 over I77 carry?
About 26,000 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is US21 over I77?
The structure is 283 ft (86.2 m) long with a longest span of 77 ft (23.4 m) and a deck 57 ft wide.
Who owns US21 over I77?
It is owned by the State Highway Agency.