I-5 over Newaukum River
FairLewis County, Washington · 1.2 N JCT SR 508 · Structure no. 0004204B0000000
- Built
- 1952
- 73 years old, rebuilt 1976
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 284 ft
- 5 main spans
- Daily traffic
- 29,186
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Newaukum River is a concrete continuous tee beam carrying I-5 over Newaukum River in Lewis County, Washington. It was built in 1952 and reconstructed in 1976, so it is 73 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 29,186 vehicles a day, roughly 21% of them trucks, projected to reach 38,177 by 2039. The structure is 284 ft (86.6 m) long and 39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Newaukum River built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1976.
What condition is I-5 over Newaukum 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 September 2024.
How much traffic does I-5 over Newaukum River carry?
About 29,186 vehicles per day (2023 count), of which roughly 21% are trucks.
How long is I-5 over Newaukum River?
The structure is 284 ft (86.6 m) long with a longest span of 90 ft (27.4 m) and a deck 39 ft wide.
Who owns I-5 over Newaukum River?
It is owned by the State Highway Agency.