Grand Loop Road over Gibbon River
FairPark County, Wyoming · 20.2 Mi. South of Mammoth · Structure no. 1570003P0000000
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 52 ft
- 1 main span
- Daily traffic
- 1,807
- 2019 count
- Owner
- Federal
- National Park Service
About this bridge
Grand Loop Road over Gibbon River is a steel stringer/multi-beam or girder carrying Grand Loop Road over Gibbon River in Park County, Wyoming. It was built in 1960, so it is 65 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.
It carries about 1,807 vehicles a day, roughly 1% of them trucks, projected to reach 2,168 by 2039. The structure is 52 ft (15.9 m) long and 35 ft wide. If it were closed, the detour would be 49.1 mi (79 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 Grand Loop Road over Gibbon River built?
It was built in 1960, making it 65 years old in 2025.
What condition is Grand Loop Road over Gibbon 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 September 2024.
How much traffic does Grand Loop Road over Gibbon River carry?
About 1,807 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is Grand Loop Road over Gibbon River?
The structure is 52 ft (15.9 m) long with a longest span of 52 ft (15.9 m) and a deck 35 ft wide.
Who owns Grand Loop Road over Gibbon River?
It is owned by the National Park Service.