Wyo 339 over I-90
FairSheridan County, Wyoming · Montana Line - Sheridan · Structure no. LLW
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 242 ft
- 3 main spans
- Daily traffic
- 234
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 339 over I-90 is a steel continuous stringer/multi-beam or girder carrying Wyo 339 over I-90 in Sheridan County, Wyoming. It was built in 2004, so it is 21 years old, younger than the Wyoming average of 48.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 234 vehicles a day, roughly 14% of them trucks, projected to reach 328 by 2043. The structure is 242 ft (73.8 m) long and 47 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 339 over I-90 built?
It was built in 2004, making it 21 years old in 2025.
What condition is Wyo 339 over I-90 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.
How much traffic does Wyo 339 over I-90 carry?
About 234 vehicles per day (2024 count), of which roughly 14% are trucks.
How long is Wyo 339 over I-90?
The structure is 242 ft (73.8 m) long with a longest span of 150 ft (45.7 m) and a deck 47 ft wide.
Who owns Wyo 339 over I-90?
It is owned by the State Highway Agency.