Structure 310A5100001 · Grundy County, TN
Carries Nfa A510 over Small Branch, .1 M East Of SR 56.
Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.
How ratings work23 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 multi-beam bridge.
| State | Tennessee |
| County | Grundy |
| Location | .1 M East Of SR 56 |
| Carries | Nfa A510 |
| Crosses | Small Branch |
| Coordinates | 35.49315, -85.65138 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 22.6 ft (6.9 m) |
| Deck Width | 12.1 ft (3.7 m) |
| Deck Area | 25.5 sq m |
| Main Spans | 1 |
| Year Built | 1945 |
| Avg Daily Traffic | 20 (2020) |
| Truck Traffic | 2% |
| Lanes On Bridge | 1 |
| Last Inspection | June 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | Unknown |
| Structure Number | 310A5100001 |
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.