311 TH Ave SE over So Slough Skykomish Rive
GoodPosted for loadSnohomish County, Washington · 0.8 S JCT SR 2 · Structure no. 080369000000000
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected November 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 188 ft
- 3 main spans
- Daily traffic
- 2,323
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
311 TH Ave SE over So Slough Skykomish Rive is a prestressed concrete tee beam carrying 311 TH Ave SE over So Slough Skykomish Rive in Snohomish County, Washington. It was built in 1984, so it is 41 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. Its operating status is: posted for load restriction.
It carries about 2,323 vehicles a day, roughly 11% of them trucks, projected to reach 3,000 by 2046. The structure is 188 ft (57.3 m) long and 37 ft wide. If it were closed, the detour would be 18 mi (29 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 311 TH Ave SE over So Slough Skykomish Rive built?
It was built in 1984, making it 41 years old in 2025.
What condition is 311 TH Ave SE over So Slough Skykomish Rive 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 November 2024.
How much traffic does 311 TH Ave SE over So Slough Skykomish Rive carry?
About 2,323 vehicles per day (2021 count), of which roughly 11% are trucks.
How long is 311 TH Ave SE over So Slough Skykomish Rive?
The structure is 188 ft (57.3 m) long with a longest span of 60 ft (18.3 m) and a deck 37 ft wide.
Who owns 311 TH Ave SE over So Slough Skykomish Rive?
It is owned by the County Highway Agency.