Structure 25430 · Botetourt County, VA
Carries Ammen Road / 799 over Branch Of Mill Creek, 1.70 RT 640n; .70 RT 640s.
A culvert 20 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.
| State | Virginia |
| County | Botetourt |
| Location | 1.70 RT 640n; .70 RT 640s |
| Carries | Ammen Road / 799 |
| Crosses | Branch Of Mill Creek |
| Coordinates | 37.45663, -79.85062 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.3 ft (6.2 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 19.0 ft (5.8 m) |
| Deck Area | 36.0 sq m |
| Main Spans | 2 |
| Year Built | 1998 |
| Avg Daily Traffic | 72 (2019) |
| Lanes On Bridge | 2 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000025430 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.