SR 599 over I-5 (sb Lanes Only)
GoodKing County, Washington · JCT I-5 · Structure no. 0007618F0000000
- Built
- 1966
- 59 years old
- Condition
- Good
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 301 ft
- 3 main spans
- Daily traffic
- 18,948
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 599 over I-5 (sb Lanes Only) is a concrete continuous box beam or girders - multiple carrying SR 599 over I-5 (sb Lanes Only) in King County, Washington. It was built in 1966, so it is 59 years old, older 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 18,948 vehicles a day, roughly 10% of them trucks, projected to reach 29,383 by 2039. The structure is 301 ft (91.7 m) long and 35 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 599 over I-5 (sb Lanes Only) built?
It was built in 1966, making it 59 years old in 2025.
What condition is SR 599 over I-5 (sb Lanes Only) 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 March 2024.
How much traffic does SR 599 over I-5 (sb Lanes Only) carry?
About 18,948 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 599 over I-5 (sb Lanes Only)?
The structure is 301 ft (91.7 m) long with a longest span of 115 ft (35.1 m) and a deck 35 ft wide.
Who owns SR 599 over I-5 (sb Lanes Only)?
It is owned by the State Highway Agency.