Stampede RD over I-90
FairKittitas County, Washington · 8.3 E JCT SR 906 · Structure no. 0005641A0000000
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 151 ft
- 3 main spans
- Daily traffic
- 378
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
Stampede RD over I-90 is a prestressed concrete stringer/multi-beam or girder carrying Stampede RD over I-90 in Kittitas County, Washington. It was built in 1958, so it is 67 years old, older than the Washington average of 49.8 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 378 vehicles a day, roughly 15% of them trucks. The structure is 151 ft (46 m) long and 33 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Stampede RD over I-90 built?
It was built in 1958, making it 67 years old in 2025.
What condition is Stampede RD over I-90 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 Stampede RD over I-90 carry?
About 378 vehicles per day (2012 count), of which roughly 15% are trucks.
How long is Stampede RD over I-90?
The structure is 151 ft (46 m) long with a longest span of 51 ft (15.5 m) and a deck 33 ft wide.
Who owns Stampede RD over I-90?
It is owned by the State Highway Agency.