I-77 Nbl over Mitchell River
Surry County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-77 Nbl over Mitchell River in Surry County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1974, making it 51 years old at the 2025 inventory.
- It carries about 13,000 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 190 of the 309 inventoried bridges in Surry County rated fair (61.5%); 26 (8.4%) 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 September 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 → (36.30983, -80.80432)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 300 ft |
| Location | .7 MI.N.JCT.SR1131 |
| NBI structure number | 000000001710121 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Carolina department of transportation.
Busiest bridges in Surry County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I77 over Stewarts Creek | 1975 | 39,000 | Fair |
| US52 over Grassy Creek | 1962 | 28,500 | Poor |
| US52 over Flat Shoals Creek | 1953 | 28,500 | Fair |
| I-77 over Beaverdam Creek | 1975 | 24,000 | Fair |
| I77 over Camp Creek | 1974 | 23,500 | Fair |
| I-77 over Little Fisher River | 1975 | 21,500 | Fair |
All bridges nearby: Surry County, NC bridge conditions · every bridge in Surry County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.