Mo 99 S over Middle Fk CR
Oregon County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mo 99 S over Middle Fk CR in Oregon County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2001, making it 24 years old at the 2025 inventory.
- It carries about 718 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 58 of the 84 inventoried bridges in Oregon County rated fair (69.0%); 7 (8.3%) 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 January 2024, 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 → (36.78445, -91.53162)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 331 ft |
| Location | S 5 T 24 N R 5 W |
| NBI structure number | 29140 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| 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 Oregon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 63 S over Warm Fork BNSF RR | 1966 | 11,830 | Fair |
| US 63 S over Warm Fork | 1966 | 8,005 | Fair |
| Mo 19 S over Tucker CR | 1972 | 3,337 | Fair |
| Mo 19 S over Piney CR | 1972 | 2,490 | Fair |
| Bu 63 S over Two Mile CR BNSF RR | 2020 | 2,490 | Good |
| Mo 142 E over Cox CR | 1968 | 2,410 | Fair |
All bridges nearby: Oregon County, MO bridge conditions · every bridge in Oregon County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.