Structure 31588 · Clark County, MO
Carries US 61 S over Unnamed Trib, S 4 T 63 N R 6 W.
A culvert 21 ft across with 3 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 | Missouri |
| County | Clark |
| Location | S 4 T 63 N R 6 W |
| Carries | US 61 S |
| Crosses | Unnamed Trib |
| Coordinates | 40.28214, -91.56600 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 6.6 ft (2 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 84.4 sq m |
| Main Spans | 3 |
| Year Built | 2006 |
| Avg Daily Traffic | 14,279 (2024) |
| Truck Traffic | 32% |
| Lanes On Bridge | 4 |
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 31588 |
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.