US421 over S.prong Lewis Fork Creek
Wilkes County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US421 over S.prong Lewis Fork Creek in Wilkes County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1981, making it 44 years old at the 2025 inventory.
- It carries about 9,400 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 181 of the 350 inventoried bridges in Wilkes County rated fair (51.7%); 51 (14.6%) 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 November 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 → (36.19708, -81.42758)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 25 ft |
| Location | 75 FT.S.JCT.SR1301 |
| NBI structure number | 000000001930027 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 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 North Carolina department of transportation.
Busiest bridges in Wilkes County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US421 Byp over Tucker Hole Creek | 1955 | 31,500 | Fair |
| US421 Byp over Little Cub Creek | 1966 | 26,000 | Good |
| US421 Byp over Cub Creek | 1966 | 25,000 | Fair |
| US421 over Miller Creek | 1955 | 23,000 | Fair |
| US421 Sbl over SR2325 | 2002 | 19,500 | Good |
| US421B over Reddies River | 1935 | 18,000 | Poor |
All bridges nearby: Wilkes County, NC bridge conditions · every bridge in Wilkes County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.