Going-To-The-Sun R over St. Mary River
FairGlacier County, Montana · 0.8 Mi. NW of Jct. Hwy. 8 · Structure no. 1430027P0000000
- Built
- 1934
- 91 years old
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete Continuous
- Length
- 140 ft
- 3 main spans
- Daily traffic
- 2,300
- 2023 count
- Owner
- Federal
- National Park Service
About this bridge
Going-To-The-Sun R over St. Mary River is a concrete continuous slab carrying Going-To-The-Sun R over St. Mary River in Glacier County, Montana. It was built in 1934, so it is 91 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 2,300 vehicles a day, roughly 10% of them trucks, projected to reach 2,530 by 2043. The structure is 140 ft (42.7 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Going-To-The-Sun R over St. Mary River built?
It was built in 1934, making it 91 years old in 2025.
What condition is Going-To-The-Sun R over St. Mary River 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 September 2023.
How much traffic does Going-To-The-Sun R over St. Mary River carry?
About 2,300 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Going-To-The-Sun R over St. Mary River?
The structure is 140 ft (42.7 m) long with a longest span of 52 ft (16 m) and a deck 32 ft wide.
Who owns Going-To-The-Sun R over St. Mary River?
It is owned by the National Park Service.