Rt O S over Elm Br
Audrain County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rt O S over Elm Br in Audrain County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1956, making it 69 years old at the 2025 inventory.
- It carries about 195 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 169 of the 315 inventoried bridges in Audrain County rated fair (53.7%); 13 (4.1%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.33151, -91.76433)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | S 35 T 53 N R 8 W |
| NBI structure number | 6870 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Audrain County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 15 S over Hamilton CR | 1929 | 11,448 | Fair |
| Mo 15 S over US 54 | 1991 | 8,255 | Fair |
| Clark St over NS RR | 1995 | 8,000 | Fair |
| US 54 E over W Fork Bean CR | 1932 | 6,929 | Fair |
| Bu 54 E over C & A Lake | 1922 | 6,481 | Fair |
| Bu 54 E over S. Fork Salt River | 1924 | 6,481 | Fair |
All bridges nearby: Audrain County, MO bridge conditions · every bridge in Audrain County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.