311 TH Ave SE over Branch So Sl Skykomish R
FairSnohomish County, Washington · 0.7 S JCT SR 2 · Structure no. 080370000000000
- Built
- 1970
- 55 years old, rebuilt 1988
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 90 ft
- 5 main spans
- Daily traffic
- 2,323
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
311 TH Ave SE over Branch So Sl Skykomish R is a wood or timber stringer/multi-beam or girder carrying 311 TH Ave SE over Branch So Sl Skykomish R in Snohomish County, Washington. It was built in 1970 and reconstructed in 1988, so it is 55 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,323 vehicles a day, roughly 11% of them trucks, projected to reach 3,000 by 2045. The structure is 90 ft (27.4 m) long and 24 ft wide. If it were closed, the detour would be 18 mi (29 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 311 TH Ave SE over Branch So Sl Skykomish R built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1988.
What condition is 311 TH Ave SE over Branch So Sl Skykomish R in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.
How much traffic does 311 TH Ave SE over Branch So Sl Skykomish R carry?
About 2,323 vehicles per day (2021 count), of which roughly 11% are trucks.
How long is 311 TH Ave SE over Branch So Sl Skykomish R?
The structure is 90 ft (27.4 m) long with a longest span of 18 ft (5.5 m) and a deck 24 ft wide.
Who owns 311 TH Ave SE over Branch So Sl Skykomish R?
It is owned by the County Highway Agency.