S 69 over Int Boulder I 15
FairJefferson County, Montana · Boulder · Structure no. P00069038+03961
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 262 ft
- 2 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
S 69 over Int Boulder I 15 is a steel continuous stringer/multi-beam or girder carrying S 69 over Int Boulder I 15 in Jefferson 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 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 262 ft (79.8 m) long and 46 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 69 over Int Boulder I 15 built?
It was built in 1973, making it 52 years old in 2025.
What condition is S 69 over Int Boulder I 15 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 February 2024.
How much traffic does S 69 over Int Boulder I 15 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is S 69 over Int Boulder I 15?
The structure is 262 ft (79.8 m) long with a longest span of 130 ft (39.6 m) and a deck 46 ft wide.
Who owns S 69 over Int Boulder I 15?
It is owned by the State Highway Agency.