Nfa D604 over Lyon Creek
GoodKnox County, Tennessee · Just E of US11W-US70 JCT · Structure no. 470D6040001
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected May 2024
- Type
- Channel Beam
- Concrete
- Length
- 31 ft
- 2 main spans
- Daily traffic
- 350
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa D604 over Lyon Creek is a concrete channel beam carrying Nfa D604 over Lyon Creek in Knox County, Tennessee. It was built in 1964, so it is 61 years old, older than the Tennessee average of 47.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 350 vehicles a day, roughly 2% of them trucks, projected to reach 560 by 2040. The structure is 31 ft (9.5 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa D604 over Lyon Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is Nfa D604 over Lyon Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does Nfa D604 over Lyon Creek carry?
About 350 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Nfa D604 over Lyon Creek?
The structure is 31 ft (9.5 m) long with a longest span of 14 ft (4.3 m) and a deck 22 ft wide.
Who owns Nfa D604 over Lyon Creek?
It is owned by the County Highway Agency.