Wyo 120 over Big Sand Coulee
FairPark County, Wyoming · Cody - Montana St. Line · Structure no. LBY
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 138 ft
- 3 main spans
- Daily traffic
- 2,043
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 120 over Big Sand Coulee is a steel continuous stringer/multi-beam or girder carrying Wyo 120 over Big Sand Coulee in Park County, Wyoming. It was built in 2002, so it is 23 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 2,043 vehicles a day, roughly 11% of them trucks, projected to reach 2,860 by 2043. The structure is 138 ft (42 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 120 over Big Sand Coulee built?
It was built in 2002, making it 23 years old in 2025.
What condition is Wyo 120 over Big Sand Coulee 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 120 over Big Sand Coulee carry?
About 2,043 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is Wyo 120 over Big Sand Coulee?
The structure is 138 ft (42 m) long with a longest span of 59 ft (18 m) and a deck 43 ft wide.
Who owns Wyo 120 over Big Sand Coulee?
It is owned by the State Highway Agency.