S 200 over Blackfoot River
FairMissoula County, Montana · 4M E Bonner · Structure no. P00024005+05011
- Built
- 1968
- 57 years old, rebuilt 2002
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 450 ft
- 6 main spans
- Daily traffic
- 4,627
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 200 over Blackfoot River is a prestressed concrete stringer/multi-beam or girder carrying S 200 over Blackfoot River in Missoula County, Montana. It was built in 1968 and reconstructed in 2002, so it is 57 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 4,627 vehicles a day, roughly 5% of them trucks, projected to reach 4,858 by 2043. The structure is 450 ft (137.1 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 200 over Blackfoot River built?
It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2002.
What condition is S 200 over Blackfoot River 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 May 2024.
How much traffic does S 200 over Blackfoot River carry?
About 4,627 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S 200 over Blackfoot River?
The structure is 450 ft (137.1 m) long with a longest span of 85 ft (25.9 m) and a deck 34 ft wide.
Who owns S 200 over Blackfoot River?
It is owned by the State Highway Agency.