Alaskan Way South over BNSF RR
GoodKing County, Washington · 3.6 N JCT SR 509 · Structure no. 0018290B0000000
- Built
- 2013
- 12 years old
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 875 ft
- 3 main spans
- Daily traffic
- 8,000
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
Alaskan Way South over BNSF RR is a prestressed concrete continuous box beam or girders - multiple carrying Alaskan Way South over BNSF RR in King County, Washington. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 8,000 vehicles a day, roughly 10% of them trucks, projected to reach 10,400 by 2032. The structure is 875 ft (266.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alaskan Way South over BNSF RR built?
It was built in 2013, making it 12 years old in 2025.
What condition is Alaskan Way South over BNSF RR 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 February 2024.
How much traffic does Alaskan Way South over BNSF RR carry?
About 8,000 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Alaskan Way South over BNSF RR?
The structure is 875 ft (266.7 m) long with a longest span of 116 ft (35.4 m) and a deck 40 ft wide.
Who owns Alaskan Way South over BNSF RR?
It is owned by the State Highway Agency.