Wyo 450 over Black Thunder Creek
FairWeston County, Wyoming · Newcastle - JCT Wyo 59 · Structure no. DFX
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 138 ft
- 3 main spans
- Daily traffic
- 725
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 450 over Black Thunder Creek is a steel continuous stringer/multi-beam or girder carrying Wyo 450 over Black Thunder Creek in Weston County, Wyoming. It was built in 1981, so it is 44 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 725 vehicles a day, roughly 40% of them trucks, projected to reach 1,015 by 2043. The structure is 138 ft (42.1 m) long and 34 ft wide. If it were closed, the detour would be 83.9 mi (135 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 450 over Black Thunder Creek built?
It was built in 1981, making it 44 years old in 2025.
What condition is Wyo 450 over Black Thunder Creek 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 July 2024.
How much traffic does Wyo 450 over Black Thunder Creek carry?
About 725 vehicles per day (2024 count), of which roughly 40% are trucks.
How long is Wyo 450 over Black Thunder Creek?
The structure is 138 ft (42.1 m) long with a longest span of 54 ft (16.5 m) and a deck 34 ft wide.
Who owns Wyo 450 over Black Thunder Creek?
It is owned by the State Highway Agency.