Structure 45460171 · McPherson County, SD
Carries 371st Avenue over Willow Creek, 2.1 S & 8 E Of Leola.
A culvert 23 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 | McPherson |
| Location | 2.1 S & 8 E Of Leola |
| Carries | 371st Avenue |
| Crosses | Willow Creek |
| Coordinates | 45.69276, -98.76646 |
| Material | Steel |
| Design | Culvert |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 57.3 sq m |
| Main Spans | 2 |
| Year Built | 1990 |
| Avg Daily Traffic | 95 (2022) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2023 |
| 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 | 000000045460171 |
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.