SW Spokane ST over Duwamish River W Waterwy
FairKing County, Washington · 1200 SW Spokane ST · Structure no. 085302000000000
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 1,340 ft
- 3 main spans
- Daily traffic
- 108,179
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
SW Spokane ST over Duwamish River W Waterwy is a concrete continuous box beam or girders - multiple carrying SW Spokane ST over Duwamish River W Waterwy in King County, Washington. It was built in 1983, so it is 42 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 108,179 vehicles a day, roughly 8% of them trucks, projected to reach 170,000 by 2040. The structure is 1,340 ft (408.4 m) long and 106 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SW Spokane ST over Duwamish River W Waterwy built?
It was built in 1983, making it 42 years old in 2025.
What condition is SW Spokane ST over Duwamish River W Waterwy 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 June 2023.
How much traffic does SW Spokane ST over Duwamish River W Waterwy carry?
About 108,179 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is SW Spokane ST over Duwamish River W Waterwy?
The structure is 1,340 ft (408.4 m) long with a longest span of 590 ft (179.8 m) and a deck 106 ft wide.
Who owns SW Spokane ST over Duwamish River W Waterwy?
It is owned by the City or Municipal Highway Agency.