Structure AFTNANZY00004 · Franklin County, TN
Carries Von Karman Road over Hyperballistics Range, 0.7 Miles West Of Base En.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work20 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a rigid-frame bridge.
| State | Tennessee |
| County | Franklin |
| Location | 0.7 Miles West Of Base En |
| Carries | Von Karman Road |
| Crosses | Hyperballistics Range |
| Coordinates | 35.38567, -86.04300 |
| Material | Concrete |
| Design | Frame |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 50.9 ft (15.5 m) |
| Deck Area | 94.5 sq m |
| Main Spans | 1 |
| Year Built | 1960 |
| Avg Daily Traffic | 150 (2020) |
| Lanes On Bridge | 2 |
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Air Force |
| Historical Significance | Historical significance is not determined |
| Scour Critical | Not applicable |
| Structure Number | AFTNANZY00004 |
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.