Structure 21670 · Lawrence County, MO
Carries County RD 2080 over Spring Rvr Br, S 4 T 28 N R 28 W.
Set by its lowest-rated component: Deck and Superstructure at 6 of 9.
How ratings work23 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 | Lawrence |
| Location | S 4 T 28 N R 28 W |
| Carries | County RD 2080 |
| Crosses | Spring Rvr Br |
| Coordinates | 37.16268, -93.99500 |
| Material | Concrete |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 15.4 ft (4.7 m) |
| Deck Area | 32.9 sq m |
| Main Spans | 1 |
| Year Built | 1910 |
| Avg Daily Traffic | 50 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | March 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 7 — Countermeasures installed |
| Structure Number | 21670 |
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.