Riverside RD over Mill Creek 148
FairFlathead County, Montana · 1M SE Creston · Structure no. L15096001+01001
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected April 2023
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Riverside RD over Mill Creek 148 is a prestressed concrete channel beam carrying Riverside RD over Mill Creek 148 in Flathead County, Montana. It was built in 1989, so it is 36 years old, younger 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 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Riverside RD over Mill Creek 148 built?
It was built in 1989, making it 36 years old in 2025.
What condition is Riverside RD over Mill Creek 148 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 April 2023.
How much traffic does Riverside RD over Mill Creek 148 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Riverside RD over Mill Creek 148?
The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 28 ft wide.
Who owns Riverside RD over Mill Creek 148?
It is owned by the County Highway Agency.