US 20 over Big Horn River
FairWashakie County, Wyoming · Worland · Structure no. CCN
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 315 ft
- 3 main spans
- Daily traffic
- 4,411
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Big Horn River is a steel continuous stringer/multi-beam or girder carrying US 20 over Big Horn River in Washakie County, Wyoming. It was built in 1975, so it is 50 years old, older 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 5 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 4,411 vehicles a day, roughly 7% of them trucks, projected to reach 6,175 by 2043. The structure is 315 ft (96 m) long and 52 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 over Big Horn River built?
It was built in 1975, making it 50 years old in 2025.
What condition is US 20 over Big Horn River 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 April 2024.
How much traffic does US 20 over Big Horn River carry?
About 4,411 vehicles per day (2024 count), of which roughly 7% are trucks.
How long is US 20 over Big Horn River?
The structure is 315 ft (96 m) long with a longest span of 122 ft (37.2 m) and a deck 52 ft wide.
Who owns US 20 over Big Horn River?
It is owned by the State Highway Agency.