I-5 over Dillenbaugh Creek
GoodLewis County, Washington · 6.8 N JCT SR 508 · Structure no. 0011430A0000000
- Built
- 1952
- 73 years old, rebuilt 1979
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 162 ft
- 8 main spans
- Daily traffic
- 32,739
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Dillenbaugh Creek is a concrete continuous slab carrying I-5 over Dillenbaugh Creek in Lewis County, Washington. It was built in 1952 and reconstructed in 1979, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 32,739 vehicles a day, roughly 21% of them trucks, projected to reach 42,618 by 2039. The structure is 162 ft (49.4 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Dillenbaugh Creek built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1979.
What condition is I-5 over Dillenbaugh Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does I-5 over Dillenbaugh Creek carry?
About 32,739 vehicles per day (2023 count), of which roughly 21% are trucks.
How long is I-5 over Dillenbaugh Creek?
The structure is 162 ft (49.4 m) long with a longest span of 22 ft (6.7 m) and a deck 84 ft wide.
Who owns I-5 over Dillenbaugh Creek?
It is owned by the State Highway Agency.