SR 409 over Garden Slough
GoodWahkiakum County, Washington · 1.6 N Ferry Dock · Structure no. 0012242A0000000
- Built
- 1982
- 43 years old
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 118 ft
- 3 main spans
- Daily traffic
- 906
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 409 over Garden Slough is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 409 over Garden Slough in Wahkiakum County, Washington. It was built in 1982, so it is 43 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 906 vehicles a day, roughly 6% of them trucks, projected to reach 938 by 2039. The structure is 118 ft (36 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
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 SR 409 over Garden Slough built?
It was built in 1982, making it 43 years old in 2025.
What condition is SR 409 over Garden Slough 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 October 2023.
How much traffic does SR 409 over Garden Slough carry?
About 906 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is SR 409 over Garden Slough?
The structure is 118 ft (36 m) long with a longest span of 41 ft (12.5 m) and a deck 36 ft wide.
Who owns SR 409 over Garden Slough?
It is owned by the State Highway Agency.