SR 508 over Tilton River
GoodLewis County, Washington · 25.0 E JCT I-5 · Structure no. 0013339A0000000
- Built
- 1988
- 37 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 330 ft
- 3 main spans
- Daily traffic
- 1,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 508 over Tilton River is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 508 over Tilton River in Lewis County, Washington. It was built in 1988, so it is 37 years old, younger 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 1,200 vehicles a day, roughly 11% of them trucks, projected to reach 1,517 by 2039. The structure is 330 ft (100.6 m) long and 31 ft wide. If it were closed, the detour would be 34.8 mi (56 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 508 over Tilton River built?
It was built in 1988, making it 37 years old in 2025.
What condition is SR 508 over Tilton River 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 August 2024.
How much traffic does SR 508 over Tilton River carry?
About 1,200 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR 508 over Tilton River?
The structure is 330 ft (100.6 m) long with a longest span of 130 ft (39.6 m) and a deck 31 ft wide.
Who owns SR 508 over Tilton River?
It is owned by the State Highway Agency.