Structure 23990 · Livingston County, MO
Carries County RD 387 over Old Chnl Grand Rvr, S 13 T 56 N R 22 W.
Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.
How ratings work21 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 | Livingston |
| Location | S 13 T 56 N R 22 W |
| Carries | County RD 387 |
| Crosses | Old Chnl Grand Rvr |
| Coordinates | 39.67296, -93.30766 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 19.7 ft (6 m) |
| Deck Width | 15.1 ft (4.6 m) |
| Deck Area | 29.4 sq m |
| Main Spans | 1 |
| Year Built | 1950 (reconstructed 2012) |
| Avg Daily Traffic | 5 (2024) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | January 2025 |
| 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 | 23990 |
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.