I 90 EB over RR
PoorPowell County, Montana · 4.3M W Garrison · Structure no. I00090170+00051
- Built
- 1973
- 52 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 250 ft
- 3 main spans
- Daily traffic
- 5,992
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 EB over RR is a prestressed concrete stringer/multi-beam or girder carrying I 90 EB over RR 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 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 5,992 vehicles a day, roughly 18% of them trucks, projected to reach 6,381 by 2043. The structure is 250 ft (76.2 m) long and 45 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 EB over RR built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 90 EB over RR 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 October 2023.
How much traffic does I 90 EB over RR carry?
About 5,992 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is I 90 EB over RR?
The structure is 250 ft (76.2 m) long with a longest span of 87 ft (26.5 m) and a deck 45 ft wide.
Who owns I 90 EB over RR?
It is owned by the State Highway Agency.