US421 Sbl over South Deep Creek
Yadkin County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US421 Sbl over South Deep Creek in Yadkin County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2001, making it 24 years old at the 2025 inventory.
- It carries about 9,500 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 96 of the 169 inventoried bridges in Yadkin County rated fair (56.8%); 17 (10.1%) 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 2023, 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 → (36.11831, -80.72289)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 354 ft |
| Location | 1.2 MI.N.JCT.SR1141 |
| NBI structure number | 000000001970219 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| 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 Yadkin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-77 over Fall Creek | 1973 | 31,000 | Fair |
| I-77 over Ut to South Deep Creek | 1974 | 30,000 | Good |
| I-77 over Arnold Branch | 1974 | 27,500 | Fair |
| US421 over S.deep Creek Trib | 2001 | 19,000 | Good |
| I-77 Nbl over NC67 | 1964 | 15,250 | Fair |
| I-77 Sbl over NC67 | 1964 | 15,250 | Fair |
All bridges nearby: Yadkin County, NC bridge conditions · every bridge in Yadkin County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.