NE 51st Street over SR 520
GoodKing County, Washington · 3.9 E JCT I-405 · Structure no. 0012854A0000000
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 228 ft
- 2 main spans
- Daily traffic
- 14,591
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
NE 51st Street over SR 520 is a prestressed concrete continuous stringer/multi-beam or girder carrying NE 51st Street over SR 520 in King County, Washington. It was built in 1987, so it is 38 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 14,591 vehicles a day, roughly 5% of them trucks, projected to reach 22,937 by 2036. The structure is 228 ft (69.5 m) long and 78 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 NE 51st Street over SR 520 built?
It was built in 1987, making it 38 years old in 2025.
What condition is NE 51st Street over SR 520 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 April 2024.
How much traffic does NE 51st Street over SR 520 carry?
About 14,591 vehicles per day (2010 count), of which roughly 5% are trucks.
How long is NE 51st Street over SR 520?
The structure is 228 ft (69.5 m) long with a longest span of 114 ft (34.6 m) and a deck 78 ft wide.
Who owns NE 51st Street over SR 520?
It is owned by the State Highway Agency.