Structure 21B00040N · Carroll County, KY
Carries I-71 over Green Bottom Road, .30 Mi Sou. Of Ky Rvr Br.
A culvert 20 ft across. 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 | Kentucky |
| County | Carroll |
| Location | .30 Mi Sou. Of Ky Rvr Br |
| Carries | I-71 |
| Crosses | Green Bottom Road |
| Coordinates | 38.63806, -85.12750 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.3 ft (6.2 m) |
| Max Span | 20.3 ft (6.2 m) |
| Deck Width | 149.9 ft (45.7 m) |
| Deck Area | 283.3 sq m |
| Main Spans | 1 |
| Year Built | 1967 |
| Avg Daily Traffic | 41,258 (2023) |
| Truck Traffic | 17% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 2 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | Not applicable |
| Structure Number | 021B00040N |
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.