I-77 Sbl over Rte 629
Wythe County, Virginia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-77 Sbl over Rte 629 in Wythe County, Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1978, making it 47 years old at the 2025 inventory.
- It carries about 21,288 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 144 of the 181 inventoried bridges in Wythe County rated fair (79.6%); 9 (5.0%) 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 → (36.92978, -80.91)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 125 ft |
| Location | 1.56 Fr 81-6.72 to Car Cl |
| NBI structure number | 000000000019578 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.
Busiest bridges in Wythe County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 81 over Stream | 1967 | 54,515 | Fair |
| Route 0081 over N&sbl & FO44 over Stream | 1967 | 54,515 | Fair |
| I-81 Nbl over Reed Creek | 1985 | 29,109 | Good |
| I-81 Nbl over NS Railway | 1986 | 29,109 | Fair |
| I-81 Sbl over NS Railway | 1986 | 28,471 | Fair |
| Sbl Route 0081 over Reed Creek | 1986 | 28,471 | Fair |
All bridges nearby: Wythe County, VA bridge conditions · every bridge in Wythe County · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.