I 15 Frontage RD over Cataract Creek 030
PoorJefferson County, Montana · 1M E Basin · Structure no. L22099008+00001
- Built
- 1933
- 92 years old
- Condition
- Poor
- inspected April 2023
- Type
- Tee Beam
- Concrete
- Length
- 80 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 Frontage RD over Cataract Creek 030 is a concrete tee beam carrying I 15 Frontage RD over Cataract Creek 030 in Jefferson County, Montana. It was built in 1933, so it is 92 years old, older 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 80 ft (24.3 m) long and 25 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 | 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 | 4 Poor | Advanced section loss, deterioration, 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 15 Frontage RD over Cataract Creek 030 built?
It was built in 1933, making it 92 years old in 2025.
What condition is I 15 Frontage RD over Cataract Creek 030 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 April 2023.
How much traffic does I 15 Frontage RD over Cataract Creek 030 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is I 15 Frontage RD over Cataract Creek 030?
The structure is 80 ft (24.3 m) long with a longest span of 27 ft (8.2 m) and a deck 25 ft wide.
Who owns I 15 Frontage RD over Cataract Creek 030?
It is owned by the State Highway Agency.