Spring Prairie RD over Stillwater River 088
FairFlathead County, Montana · 8M NW Kalispell · Structure no. L15814002+05001
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected November 2023
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 116 ft
- 2 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Spring Prairie RD over Stillwater River 088 is a prestressed concrete channel beam carrying Spring Prairie RD over Stillwater River 088 in Flathead County, Montana. It was built in 1986, so it is 39 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 5 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 116 ft (35.4 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Spring Prairie RD over Stillwater River 088 built?
It was built in 1986, making it 39 years old in 2025.
What condition is Spring Prairie RD over Stillwater River 088 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 November 2023.
How much traffic does Spring Prairie RD over Stillwater River 088 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Spring Prairie RD over Stillwater River 088?
The structure is 116 ft (35.4 m) long with a longest span of 57 ft (17.4 m) and a deck 28 ft wide.
Who owns Spring Prairie RD over Stillwater River 088?
It is owned by the County Highway Agency.