Structure 15108 · Cedar County, MO
Carries County RD 550 over Alder Br, S 9 T 35 N R 28 W.
22 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 multi-beam bridge.
| State | Missouri |
| County | Cedar |
| Location | S 9 T 35 N R 28 W |
| Carries | County RD 550 |
| Crosses | Alder Br |
| Coordinates | 37.81926, -94.01777 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 14.1 ft (4.3 m) |
| Deck Area | 28.8 sq m |
| Main Spans | 1 |
| Year Built | 1950 (reconstructed 1981) |
| Avg Daily Traffic | 100 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | December 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 | 15108 |
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.