I 90 over Sep Sheep Camp RD
FairJefferson County, Montana · 3.7M W Whitehall · Structure no. I00090245+01442
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 109 ft
- 3 main spans
- Daily traffic
- 4,650
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Sep Sheep Camp RD is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Sep Sheep Camp RD in Jefferson County, Montana. It was built in 1966, so it is 59 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 4,650 vehicles a day, roughly 24% of them trucks, projected to reach 4,952 by 2043. The structure is 109 ft (33.2 m) long and 39 ft wide.
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Sep Sheep Camp RD built?
It was built in 1966, making it 59 years old in 2025.
What condition is I 90 over Sep Sheep Camp RD 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 December 2023.
How much traffic does I 90 over Sep Sheep Camp RD carry?
About 4,650 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 90 over Sep Sheep Camp RD?
The structure is 109 ft (33.2 m) long with a longest span of 41 ft (12.6 m) and a deck 39 ft wide.
Who owns I 90 over Sep Sheep Camp RD?
It is owned by the State Highway Agency.