US421 Nbl over Dunn Erwin Rail Trail
Harnett County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US421 Nbl over Dunn Erwin Rail Trail in Harnett County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1957, making it 68 years old at the 2025 inventory.
- It carries about 6,250 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 50 of the 137 inventoried bridges in Harnett County rated fair (36.5%); 5 (3.6%) are rated poor.
- 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 → (35.32963, -78.66268)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 111 ft |
| Location | 0.9 MI.S.JCT.NC55 |
| NBI structure number | 000000000850023 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Carolina department of transportation.
Busiest bridges in Harnett County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I95 over Stoney Run | 1965 | 51,500 | Fair |
| I95N over US421 NC55 | 1955 | 25,500 | Fair |
| I95S over US421 NC55 | 1955 | 25,500 | Poor |
| NC87 over Gum Swamp | 1928 | 24,500 | Fair |
| NC87 over Cypress Creek | 1928 | 24,500 | Fair |
| US421 NC27 over West Buies Creek | 1958 | 18,000 | Good |
All bridges nearby: Harnett County, NC bridge conditions · every bridge in Harnett County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.