I40 over I40 / 21st. Street
FairKnox County, Tennessee · In Knoxville · Structure no. 47I00400051
- Built
- 1965
- 60 years old, rebuilt 1981
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 142 ft
- 3 main spans
- Daily traffic
- 139,697
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I40 over I40 / 21st. Street is a steel continuous stringer/multi-beam or girder carrying I40 over I40 / 21st. Street in Knox County, Tennessee. It was built in 1965 and reconstructed in 1981, so it is 60 years old, older than the Tennessee average of 47.4 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 139,697 vehicles a day, roughly 6% of them trucks, projected to reach 259,664 by 2041. The structure is 142 ft (43.4 m) long and 132 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I40 over I40 / 21st. Street built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1981.
What condition is I40 over I40 / 21st. Street 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 I40 over I40 / 21st. Street carry?
About 139,697 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is I40 over I40 / 21st. Street?
The structure is 142 ft (43.4 m) long with a longest span of 64 ft (19.4 m) and a deck 132 ft wide.
Who owns I40 over I40 / 21st. Street?
It is owned by the State Highway Agency.