Mo 21 S over N Prong CR
Carter County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mo 21 S over N Prong CR in Carter County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1931, making it 94 years old at the 2025 inventory.
- It carries about 2,035 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 33 of the 48 inventoried bridges in Carter County rated fair (68.8%); 2 (4.2%) 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 → (36.9009, -90.83911)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 27 ft |
| Location | S 15 T 26 N R 2 E |
| NBI structure number | 5434 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Carter County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 60 E over Cane CR | 1963 | 5,547 | Fair |
| US 60 E over Snyder CR | 1980 | 5,405 | Fair |
| US 60 E over Evans CR | 1980 | 5,405 | Fair |
| US 60 E over Dry Valley | 1983 | 5,405 | Fair |
| US 60 E over Poca Hollow | 1983 | 5,405 | Fair |
| US 60 E over Ratliffe Hollow | 1930 | 5,340 | Fair |
All bridges nearby: Carter County, MO bridge conditions · every bridge in Carter County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.