Structure 24920 · Cass County, MO
Carries Auston RD over Br Old Chnl Grand, S 31 T 43 N R 30 W.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work24 ft end to end. 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 | Cass |
| Location | S 31 T 43 N R 30 W |
| Carries | Auston RD |
| Crosses | Br Old Chnl Grand |
| Coordinates | 38.47704, -94.27075 |
| Material | Concrete |
| Design | Slab |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 13.8 ft (4.2 m) |
| Deck Area | 30.7 sq m |
| Main Spans | 1 |
| Year Built | 1935 |
| Avg Daily Traffic | 40 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 1 |
| Last Inspection | April 2023 |
| 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 | 24920 |
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.