Pioneer Highway over Stilliguamish River
GoodSnohomish County, Washington · 5.9 E JCT SR 532 · Structure no. 0011411A0000000
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 352 ft
- 3 main spans
- Daily traffic
- 2,426
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Pioneer Highway over Stilliguamish River is a prestressed concrete continuous stringer/multi-beam or girder carrying Pioneer Highway over Stilliguamish River in Snohomish County, Washington. It was built in 1979, so it is 46 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 2,426 vehicles a day, roughly 14% of them trucks, projected to reach 5,000 by 2046. The structure is 352 ft (107.3 m) long and 43 ft wide. If it were closed, the detour would be 6.2 mi (10 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 Pioneer Highway over Stilliguamish River built?
It was built in 1979, making it 46 years old in 2025.
What condition is Pioneer Highway over Stilliguamish 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 Pioneer Highway over Stilliguamish River carry?
About 2,426 vehicles per day (2020 count), of which roughly 14% are trucks.
How long is Pioneer Highway over Stilliguamish River?
The structure is 352 ft (107.3 m) long with a longest span of 116 ft (35.4 m) and a deck 43 ft wide.
Who owns Pioneer Highway over Stilliguamish River?
It is owned by the County Highway Agency.