Ramp to Main ST over Int S Deer Lodge-I 90
FairPowell County, Montana · 1M S Deer Lodge · Structure no. S00275003+00921
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 256 ft
- 5 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
Ramp to Main ST over Int S Deer Lodge-I 90 is a prestressed concrete stringer/multi-beam or girder carrying Ramp to Main ST over Int S Deer Lodge-I 90 in Powell County, Montana. It was built in 1961, so it is 64 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 256 ft (78 m) long and 28 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ramp to Main ST over Int S Deer Lodge-I 90 built?
It was built in 1961, making it 64 years old in 2025.
What condition is Ramp to Main ST over Int S Deer Lodge-I 90 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 March 2024.
How much traffic does Ramp to Main ST over Int S Deer Lodge-I 90 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Ramp to Main ST over Int S Deer Lodge-I 90?
The structure is 256 ft (78 m) long with a longest span of 61 ft (18.7 m) and a deck 28 ft wide.
Who owns Ramp to Main ST over Int S Deer Lodge-I 90?
It is owned by the State Highway Agency.