US 89 over Flat Creek
PoorTeton County, Wyoming · Hoback JCT - Jackson · Structure no. BOO
- Built
- 1938
- 87 years old, rebuilt 1969
- Condition
- Poor
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 64 ft
- 1 main span
- Daily traffic
- 15,780
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 89 over Flat Creek is a steel stringer/multi-beam or girder carrying US 89 over Flat Creek in Teton County, Wyoming. It was built in 1938 and reconstructed in 1969, so it is 87 years old, older than the Wyoming average of 48.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 15,780 vehicles a day, roughly 6% of them trucks, projected to reach 22,092 by 2043. The structure is 64 ft (19.4 m) long and 82 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 89 over Flat Creek built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1969.
What condition is US 89 over Flat Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.
How much traffic does US 89 over Flat Creek carry?
About 15,780 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is US 89 over Flat Creek?
The structure is 64 ft (19.4 m) long with a longest span of 60 ft (18.3 m) and a deck 82 ft wide.
Who owns US 89 over Flat Creek?
It is owned by the State Highway Agency.