S Yellowstone Hwy over Texas Slough
Madison County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S Yellowstone Hwy over Texas Slough in Madison County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1938, making it 87 years old at the 2025 inventory.
- It carries about 120 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 54 of the 80 inventoried bridges in Madison County rated fair (67.5%); 0 (0.0%) 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 → (43.75382, -111.84842)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 40 ft |
| Location | at Thornton |
| NBI structure number | 000000000032950 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 33 over Rexburg Canal | 1938 | 20,000 | Fair |
| SH 33 over S.fk.teton River | 1971 | 17,000 | Fair |
| US 20 Ebl over Stp 7726;S.REXBURG Ic | 1981 | 15,750 | Good |
| US 20 Wbl over Stp 7726;S.REXBURG Ic | 1981 | 15,750 | Good |
| US 20 Ebl over Texas Slough | 1981 | 15,250 | Good |
| US 20 Wbl over Texas Slough | 1981 | 15,250 | Good |
All bridges nearby: Madison County, ID bridge conditions · every bridge in Madison County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.