County Road 391 over Unknown Br
Carroll County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 391 over Unknown Br in Carroll County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 5 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 65 of the 374 inventoried bridges in Carroll County rated poor (17.4%); 65 (17.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated January 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (39.37398, -93.22279)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 34 ft |
| Location | S 25 T 53 N R 21 W |
| NBI structure number | 24108 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Carroll County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| South Main St over Wakenda CR Ovrfl | 2000 | 9,464 | Good |
| South Main St over Wakenda CR Ovrfl | 2000 | 9,168 | Good |
| South Main St over Wakenda CR | 2000 | 6,758 | Fair |
| US 65 S over Shootman CR | 1929 | 4,037 | Fair |
| US 65 S over Lit Wakenda CR | 1932 | 3,512 | Fair |
| US 24 E over Missouri Rvr Ovrfl | 1971 | 2,961 | Fair |
All bridges nearby: Carroll County, MO bridge conditions · every bridge in Carroll County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.