Structure 29291020 · Hamlin County, SD
Carries 180th Street over Trib. To Stray Horse Crk, 3n & 7.1e Of Castlewood.
A culvert 21 ft across with 2 openings. 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 | Hamlin |
| Location | 3n & 7.1e Of Castlewood |
| Carries | 180th Street |
| Crosses | Trib. To Stray Horse Crk |
| Coordinates | 44.77548, -96.90228 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 10.2 ft (3.1 m) |
| Deck Width | 21.0 ft (6.4 m) |
| Deck Area | 41.0 sq m |
| Main Spans | 2 |
| Year Built | 2020 |
| Avg Daily Traffic | 40 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000029291020 |
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.