I 90 over St. Regis Rvr-Local RD
FairMineral County, Montana · 4.3M E De Borgia · Structure no. I00090023+03251
- Built
- 1979
- 46 years old, rebuilt 2009
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 638 ft
- 4 main spans
- Daily traffic
- 7,448
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over St. Regis Rvr-Local RD is a steel continuous stringer/multi-beam or girder carrying I 90 over St. Regis Rvr-Local RD in Mineral County, Montana. It was built in 1979 and reconstructed in 2009, so it is 46 years old, younger 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 5 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 7,448 vehicles a day, roughly 26% of them trucks, projected to reach 7,820 by 2043. The structure is 638 ft (194.4 m) long and 88 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over St. Regis Rvr-Local RD built?
It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2009.
What condition is I 90 over St. Regis Rvr-Local 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 July 2023.
How much traffic does I 90 over St. Regis Rvr-Local RD carry?
About 7,448 vehicles per day (2023 count), of which roughly 26% are trucks.
How long is I 90 over St. Regis Rvr-Local RD?
The structure is 638 ft (194.4 m) long with a longest span of 179 ft (54.6 m) and a deck 88 ft wide.
Who owns I 90 over St. Regis Rvr-Local RD?
It is owned by the State Highway Agency.