I-81 Sbl over Blacks Run
Rockingham County, Virginia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-81 Sbl over Blacks Run in Rockingham 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 1959, making it 66 years old at the 2025 inventory.
- It carries about 28,820 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 125 of the 287 inventoried bridges in Rockingham County rated fair (43.6%); 9 (3.1%) 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 August 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 → (38.41268, -78.89109)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 131 ft |
| Location | 1.17 to 11 - 1.45 to 253 |
| NBI structure number | 000000000020448 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 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 Virginia department of transportation.
Busiest bridges in Rockingham County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Route 0081 over Trib Dry Fork | 1960 | 52,694 | Fair |
| Route 0081 over Dry Fork Creek | 1966 | 52,192 | Fair |
| I-81 Nbl over Blacks Run | 1966 | 29,699 | Fair |
| I-81 Sbl over NS Railway | 1959 | 28,820 | Fair |
| I-81 Nbl over Blacks Run | 1959 | 28,521 | Fair |
| I-81 Nbl over NS Railway | 1959 | 28,521 | Fair |
All bridges nearby: Rockingham County, VA bridge conditions · every bridge in Rockingham County · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.