I 90 over Dempsey Creek
FairPowell County, Montana · N Sager Lane Overpass · Structure no. I00090192+03001
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Steel
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 10,708
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Dempsey Creek is a steel culvert carrying I 90 over Dempsey Creek in Powell County, Montana. It was built in 1973, so it is 52 years old, older than the Montana average of 47 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 10,708 vehicles a day, roughly 17% of them trucks, projected to reach 11,618 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 19.9 mi (32 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Dempsey Creek built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 90 over Dempsey 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 February 2024.
How much traffic does I 90 over Dempsey Creek carry?
About 10,708 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is I 90 over Dempsey Creek?
The structure is 30 ft (9.1 m) long with a longest span of 12 ft (3.6 m).
Who owns I 90 over Dempsey Creek?
It is owned by the State Highway Agency.