Mill Gap Rd over Jackson River
Highland County, Virginia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mill Gap Rd over Jackson River in Highland County, Virginia, 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 1931, making it 94 years old at the 2025 inventory.
- It carries about 510 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 25 of the 53 inventoried bridges in Highland County rated fair (47.2%); 3 (5.7%) 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 2024, 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 → (38.37693, -79.64046)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 64 ft |
| Location | 1.41 Rt 640 - 0.41 Rt 637 |
| NBI structure number | 000000000010211 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| 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 Highland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Potomac River Road over S Branch Potomac River | 1931 | 1,314 | Fair |
| Potomac River Rd over Strait Creek | 1931 | 1,314 | Fair |
| Potomac River Road over E Branch Strait Creek | 1931 | 1,314 | Poor |
| Potomac Rver Road over Peck Run | 2000 | 1,314 | Good |
| Highland Tpke over Crab Run | 1976 | 1,057 | Fair |
| Rte 250 over Crab Run @ Mcdowell | 2012 | 1,057 | Good |
All bridges nearby: Highland County, VA bridge conditions · every bridge in Highland County · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.