I-25 Sbl over South Fork Powder River
PoorJohnson County, Wyoming · Casper - Kaycee · Structure no. AJW
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 264 ft
- 5 main spans
- Daily traffic
- 1,647
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-25 Sbl over South Fork Powder River is a steel continuous stringer/multi-beam or girder carrying I-25 Sbl over South Fork Powder River in Johnson 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 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 1,647 vehicles a day, roughly 30% of them trucks, projected to reach 2,306 by 2043. The structure is 264 ft (80.5 m) long and 43 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 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 | 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 I-25 Sbl over South Fork Powder River built?
It was built in 1960, making it 65 years old in 2025.
What condition is I-25 Sbl over South Fork Powder River 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 March 2023.
How much traffic does I-25 Sbl over South Fork Powder River carry?
About 1,647 vehicles per day (2024 count), of which roughly 30% are trucks.
How long is I-25 Sbl over South Fork Powder River?
The structure is 264 ft (80.5 m) long with a longest span of 56 ft (17.1 m) and a deck 43 ft wide.
Who owns I-25 Sbl over South Fork Powder River?
It is owned by the State Highway Agency.