Oak Street over I-5
FairCowlitz County, Washington · 9.6 N JCT SR 503 · Structure no. 0008287C0000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 233 ft
- 4 main spans
- Daily traffic
- 2,051
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
Oak Street over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying Oak Street over I-5 in Cowlitz County, Washington. It was built in 1968, so it is 57 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 2,051 vehicles a day, roughly 5% of them trucks, projected to reach 2,959 by 2038. The structure is 233 ft (71 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Oak Street over I-5 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Oak Street over I-5 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 Oak Street over I-5 carry?
About 2,051 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is Oak Street over I-5?
The structure is 233 ft (71 m) long with a longest span of 72 ft (21.9 m) and a deck 36 ft wide.
Who owns Oak Street over I-5?
It is owned by the State Highway Agency.