County Rd S-75 over Walnut CR
Polk County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Rd S-75 over Walnut CR in Polk County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1900, making it 125 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 89 of the 184 inventoried bridges in Polk County rated fair (48.4%); 32 (17.4%) 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 → (37.53469, -93.50117)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 22 ft |
| Location | S 6 T 32 N R 23 W |
| NBI structure number | 20815 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Polk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 13 S over Slagle CR | 1973 | 25,477 | Fair |
| Mo 13 S over Dry Sac Rvr Br | 1973 | 22,761 | Fair |
| Mo 13 S over Br of Brush CR | 1958 | 14,992 | Fair |
| Mo 13 S over Br Dry Fork CR | 1958 | 14,992 | Fair |
| Mo 13 S over Dry Sac Rvr | 1972 | 11,979 | Fair |
| Mo 83 S over Mo 13 | 2003 | 11,254 | Fair |
All bridges nearby: Polk County, MO bridge conditions · every bridge in Polk County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.