Nfa D403 over Little Flat Creek
Knox County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa D403 over Little Flat Creek in Knox County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1973, making it 52 years old at the 2025 inventory.
- It carries about 60 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 275 of the 584 inventoried bridges in Knox County rated fair (47.1%); 3 (0.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (36.12385, -83.77492)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel culvert |
| Length | about 30 ft |
| Location | S of Corryton |
| NBI structure number | 470D4030001 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Knox County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I40 over I40 / Papermill Rd. | 2006 | 182,502 | Good |
| I40 over I40 / Hollywood Dr. | 1965 | 182,502 | Good |
| I40 over I40/i40-eb Rmp to I75 N | 1981 | 182,502 | Good |
| I40 over Third Creek | 1965 | 182,502 | Fair |
| WB Frontage Rd. over I40-wb-rmp / Papermill | 2005 | 182,502 | Good |
| I40 Rmp C-c over I40-wb Rmp-i75n / Pmill | 1982 | 182,502 | Good |
All bridges nearby: Knox County, TN bridge conditions · every bridge in Knox County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.