Structure 20815 · Polk County, MO
Carries County RD S-75 over Walnut CR, S 6 T 32 N R 23 W.
23 ft end to end, longest span 10 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 slab bridge.
| State | Missouri |
| County | Polk |
| Location | S 6 T 32 N R 23 W |
| Carries | County RD S-75 |
| Crosses | Walnut CR |
| Coordinates | 37.53469, -93.50117 |
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 14.1 ft (4.3 m) |
| Deck Area | 30.1 sq m |
| Main Spans | 2 |
| Year Built | 1900 |
| Avg Daily Traffic | 20 (2024) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | April 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 20815 |
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.