SR 506 over I-5
GoodLewis County, Washington · JCT I-5 · Structure no. 0005679A0000000
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected March 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 177 ft
- 4 main spans
- Daily traffic
- 1,070
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 506 over I-5 is a prestressed concrete slab carrying SR 506 over I-5 in Lewis 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 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 1,070 vehicles a day, roughly 10% of them trucks, projected to reach 1,801 by 2039. The structure is 177 ft (53.9 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 506 over I-5 built?
It was built in 1958, making it 67 years old in 2025.
What condition is SR 506 over I-5 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 March 2024.
How much traffic does SR 506 over I-5 carry?
About 1,070 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 506 over I-5?
The structure is 177 ft (53.9 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.
Who owns SR 506 over I-5?
It is owned by the State Highway Agency.