SR 523 / NE 145th over I-5
GoodKing County, Washington · 0.9 E JCT SR 99 · Structure no. 0007270E0000000
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 249 ft
- 4 main spans
- Daily traffic
- 26,758
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 523 / NE 145th over I-5 is a concrete continuous box beam or girders - multiple carrying SR 523 / NE 145th over I-5 in King County, Washington. It was built in 1964, so it is 61 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 26,758 vehicles a day, roughly 3% of them trucks, projected to reach 42,753 by 2039. The structure is 249 ft (75.9 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 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 523 / NE 145th over I-5 built?
It was built in 1964, making it 61 years old in 2025.
What condition is SR 523 / NE 145th over I-5 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 September 2023.
How much traffic does SR 523 / NE 145th over I-5 carry?
About 26,758 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is SR 523 / NE 145th over I-5?
The structure is 249 ft (75.9 m) long with a longest span of 75 ft (22.9 m) and a deck 72 ft wide.
Who owns SR 523 / NE 145th over I-5?
It is owned by the State Highway Agency.