Pacific Highway over Duwamish River
FairKing County, Washington · 0.1 MI N JCT SR599 & SR99 · Structure no. 086515000000000
- Built
- 2000
- 25 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 221 ft
- 1 main span
- Daily traffic
- 22,406
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Pacific Highway over Duwamish River is a steel stringer/multi-beam or girder carrying Pacific Highway over Duwamish River in King County, Washington. It was built in 2000, so it is 25 years old, younger 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 6 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 22,406 vehicles a day, roughly 19% of them trucks, projected to reach 32,500 by 2042. The structure is 221 ft (67.4 m) long and 83 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Pacific Highway over Duwamish River built?
It was built in 2000, making it 25 years old in 2025.
What condition is Pacific Highway over Duwamish River 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 August 2024.
How much traffic does Pacific Highway over Duwamish River carry?
About 22,406 vehicles per day (2022 count), of which roughly 19% are trucks.
How long is Pacific Highway over Duwamish River?
The structure is 221 ft (67.4 m) long with a longest span of 215 ft (65.5 m) and a deck 83 ft wide.
Who owns Pacific Highway over Duwamish River?
It is owned by the City or Municipal Highway Agency.