County Rd 550 over Trib Wolf CR
Vernon County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Rd 550 over Trib Wolf CR in Vernon County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 242 of the 404 inventoried bridges in Vernon County rated fair (59.9%); 15 (3.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated December 2023, on a 24-month routine inspection cycle.
- 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 → (38.0035, -94.52969)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 20 ft |
| Location | S 11 T 37 N R 33 W |
| NBI structure number | 34357 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Vernon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 49 S over Dry CR | 1977 | 14,957 | Fair |
| US 54 E over Cst Underpass St Mna RR | 1963 | 14,820 | Fair |
| Is 49 S over Lp 49 | 1969 | 9,382 | Fair |
| Is 49 S over Mna RR | 1969 | 9,382 | Fair |
| Is 49 S over US 54 Mna RR | 1969 | 9,382 | Poor |
| Is 49 N over Mna RR | 1969 | 8,111 | Fair |
All bridges nearby: Vernon County, MO bridge conditions · every bridge in Vernon County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.