Wyo 77 over Muddy Creek
FairPosted for loadCarbon County, Wyoming · JCT Wyo 487 - Shirley Rim · Structure no. BLZ
- Built
- 1957
- 68 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Concrete Continuous
- Length
- 91 ft
- 4 main spans
- Daily traffic
- 53
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 77 over Muddy Creek is a concrete continuous slab carrying Wyo 77 over Muddy Creek in Carbon County, Wyoming. It was built in 1957, so it is 68 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 53 vehicles a day, roughly 2% of them trucks, projected to reach 74 by 2043. The structure is 91 ft (27.6 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 77 over Muddy Creek built?
It was built in 1957, making it 68 years old in 2025.
What condition is Wyo 77 over Muddy 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 June 2024.
How much traffic does Wyo 77 over Muddy Creek carry?
About 53 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is Wyo 77 over Muddy Creek?
The structure is 91 ft (27.6 m) long with a longest span of 24 ft (7.3 m) and a deck 33 ft wide.
Who owns Wyo 77 over Muddy Creek?
It is owned by the State Highway Agency.