IRR - US 89 over South Fork Milk River
GoodGlacier County, Montana · 48 39 05.40 · Structure no. 000000202206060
- Built
- 2022
- 3 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 73 ft
- 1 main span
- Daily traffic
- 1,718
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - US 89 over South Fork Milk River is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 89 over South Fork Milk River in Glacier County, Montana. It was built in 2022, so it is 3 years old, younger than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,718 vehicles a day, roughly 1% of them trucks, projected to reach 2,019 by 2043. The structure is 73 ft (22.3 m) long and 43 ft wide. If it were closed, the detour would be 34.2 mi (55 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - US 89 over South Fork Milk River built?
It was built in 2022, making it 3 years old in 2025.
What condition is IRR - US 89 over South Fork Milk River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does IRR - US 89 over South Fork Milk River carry?
About 1,718 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is IRR - US 89 over South Fork Milk River?
The structure is 73 ft (22.3 m) long with a longest span of 73 ft (22.3 m) and a deck 43 ft wide.
Who owns IRR - US 89 over South Fork Milk River?
It is owned by the State Highway Agency.