Structure 55020085 · Roberts County, SD
Carries 451st Avenue over Creek, 3s & 4w Of Claire City.
25 ft end to end, longest span 12 ft. 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 | South Dakota |
| County | Roberts |
| Location | 3s & 4w Of Claire City |
| Carries | 451st Avenue |
| Crosses | Creek |
| Coordinates | 45.81199, -97.18656 |
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 24.6 ft (7.5 m) |
| Max Span | 11.8 ft (3.6 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 54.8 sq m |
| Main Spans | 2 |
| Year Built | 1940 |
| Avg Daily Traffic | 29 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2024 |
| Inspection Frequency | Every 12 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Unknown |
| Structure Number | 000000055020085 |
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.