I-25 Sbl over South Fork Powder River
Johnson County, Wyoming · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-25 Sbl over South Fork Powder River in Johnson County, Wyoming, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 1,647 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- 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 → (43.62794, -106.57218)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 264 ft |
| Location | Casper - Kaycee |
| NBI structure number | AJW |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wyoming department of transportation.
All bridges nearby: Johnson County, WY bridge conditions · Wyoming bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.