US 310 over Shoshone River
Big Horn County, Wyoming · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 310 over Shoshone River in Big Horn County, Wyoming, 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 1965, making it 60 years old at the 2025 inventory.
- It carries about 4,224 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 57 of the 91 inventoried bridges in Big Horn County rated fair (62.6%); 9 (9.9%) 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 July 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 → (44.83875, -108.43282)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 293 ft |
| Location | Lovell - Deaver |
| NBI structure number | BSO |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| 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 Wyoming department of transportation.
Busiest bridges in Big Horn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over Dry Creek | 1961 | 5,103 | Good |
| US 14 over BNSF Railway | 1961 | 5,103 | Fair |
| US 16 over Greybull River | 1955 | 3,036 | Fair |
| US 16 over BNSF Railway | 2005 | 3,036 | Fair |
| US 310 over Little Dry Creek | 1957 | 2,271 | Fair |
| US 310 over Sage Creek | 2019 | 2,247 | Good |
All bridges nearby: Big Horn County, WY bridge conditions · every bridge in Big Horn County · Wyoming bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.