I 90 over Abandoned RR
PoorGallatin County, Montana · Three Forks · Structure no. I00090277+09262
- Built
- 1969
- 56 years old
- Condition
- Poor
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 203 ft
- 3 main spans
- Daily traffic
- 8,575
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Abandoned RR is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Abandoned RR in Gallatin County, Montana. It was built in 1969, so it is 56 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 8,575 vehicles a day, roughly 14% of them trucks, projected to reach 9,689 by 2043. The structure is 203 ft (61.9 m) long and 41 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 over Abandoned RR built?
It was built in 1969, making it 56 years old in 2025.
What condition is I 90 over Abandoned 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 January 2024.
How much traffic does I 90 over Abandoned RR carry?
About 8,575 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is I 90 over Abandoned RR?
The structure is 203 ft (61.9 m) long with a longest span of 75 ft (22.9 m) and a deck 41 ft wide.
Who owns I 90 over Abandoned RR?
It is owned by the State Highway Agency.