Pioneer Highway over Stillaguamish River
GoodSnohomish County, Washington · 2.0 W JCT I-5 · Structure no. 086397000000000
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 235 ft
- 1 main span
- Daily traffic
- 3,693
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Pioneer Highway over Stillaguamish River is a prestressed concrete continuous stringer/multi-beam or girder carrying Pioneer Highway over Stillaguamish River in Snohomish County, Washington. It was built in 1998, so it is 27 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 3,693 vehicles a day, roughly 14% of them trucks, projected to reach 7,500 by 2042. The structure is 235 ft (71.7 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 Stillaguamish River built?
It was built in 1998, making it 27 years old in 2025.
What condition is Pioneer Highway over Stillaguamish 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 May 2024.
How much traffic does Pioneer Highway over Stillaguamish River carry?
About 3,693 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is Pioneer Highway over Stillaguamish River?
The structure is 235 ft (71.7 m) long with a longest span of 169 ft (51.5 m) and a deck 43 ft wide.
Who owns Pioneer Highway over Stillaguamish River?
It is owned by the County Highway Agency.