I 15 Frontage RD over Basin Creek 041
PoorJefferson County, Montana · Basin · Structure no. L22099008+09001
- Built
- 1985
- 40 years old
- Condition
- Poor
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 Frontage RD over Basin Creek 041 is a prestressed concrete stringer/multi-beam or girder carrying I 15 Frontage RD over Basin Creek 041 in Jefferson County, Montana. It was built in 1985, so it is 40 years old, younger 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 63 ft (19.2 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 Frontage RD over Basin Creek 041 built?
It was built in 1985, making it 40 years old in 2025.
What condition is I 15 Frontage RD over Basin Creek 041 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 December 2024.
How much traffic does I 15 Frontage RD over Basin Creek 041 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is I 15 Frontage RD over Basin Creek 041?
The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 28 ft wide.
Who owns I 15 Frontage RD over Basin Creek 041?
It is owned by the State Highway Agency.