North Mercer Way over I-90
GoodKing County, Washington · 5.0 E JCT SR 900 · Structure no. 0013221B0000000
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 255 ft
- 3 main spans
- Daily traffic
- 2,922
- 2002 count
- Owner
- State
- State Highway Agency
About this bridge
North Mercer Way over I-90 is a concrete continuous box beam or girders - multiple carrying North Mercer Way over I-90 in King County, Washington. It was built in 1989, so it is 36 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 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 2,922 vehicles a day, roughly 2% of them trucks, projected to reach 5,108 by 2036. The structure is 255 ft (77.7 m) long and 148 ft wide.
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 North Mercer Way over I-90 built?
It was built in 1989, making it 36 years old in 2025.
What condition is North Mercer Way over I-90 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 June 2024.
How much traffic does North Mercer Way over I-90 carry?
About 2,922 vehicles per day (2002 count), of which roughly 2% are trucks.
How long is North Mercer Way over I-90?
The structure is 255 ft (77.7 m) long with a longest span of 85 ft (25.9 m) and a deck 148 ft wide.
Who owns North Mercer Way over I-90?
It is owned by the State Highway Agency.