Structure 20303000001026 · Custer County, SD
Carries Fdr 345 over Iron Creek, T 2 S R 6 E Sec 31.
A culvert 25 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 | South Dakota |
| County | Custer |
| Location | T 2 S R 6 E Sec 31 |
| Carries | Fdr 345 |
| Crosses | Iron Creek |
| Coordinates | 43.83718, -103.45115 |
| Material | Aluminum/Wrought Iron/Cast Iron |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Area | 32.7 sq m |
| Main Spans | 1 |
| Year Built | 1991 |
| Avg Daily Traffic | 25 (1992) |
| Lanes On Bridge | 1 |
| Last Inspection | June 2023 |
| Inspection Frequency | Every 24 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 020303000001026 |
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.