I 90 over Cedar Creek
FairMineral County, Montana · 1.2M E Superior · Structure no. I00090049+00661
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 169 ft
- 3 main spans
- Daily traffic
- 3,825
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Cedar Creek is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Cedar Creek in Mineral County, Montana. It was built in 1966, so it is 59 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 3,825 vehicles a day, roughly 24% of them trucks, projected to reach 4,015 by 2043. The structure is 169 ft (51.5 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Cedar Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is I 90 over Cedar Creek 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 October 2023.
How much traffic does I 90 over Cedar Creek carry?
About 3,825 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 90 over Cedar Creek?
The structure is 169 ft (51.5 m) long with a longest span of 56 ft (17.2 m) and a deck 40 ft wide.
Who owns I 90 over Cedar Creek?
It is owned by the State Highway Agency.