Ramp 45th to I-5 N over Ramp NB I-5 to 50th
GoodKing County, Washington · 1.4 N JCT SR 520 · Structure no. 0006304A0000000
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete
- Length
- 44 ft
- 1 main span
- Daily traffic
- 10,276
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ramp 45th to I-5 N over Ramp NB I-5 to 50th is a concrete slab carrying Ramp 45th to I-5 N over Ramp NB I-5 to 50th in King County, Washington. It was built in 1961, so it is 64 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 10,276 vehicles a day, roughly 5% of them trucks, projected to reach 14,938 by 2039. The structure is 44 ft (13.5 m) long and 30 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 Ramp 45th to I-5 N over Ramp NB I-5 to 50th built?
It was built in 1961, making it 64 years old in 2025.
What condition is Ramp 45th to I-5 N over Ramp NB I-5 to 50th 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 2024.
How much traffic does Ramp 45th to I-5 N over Ramp NB I-5 to 50th carry?
About 10,276 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Ramp 45th to I-5 N over Ramp NB I-5 to 50th?
The structure is 44 ft (13.5 m) long with a longest span of 38 ft (11.7 m) and a deck 30 ft wide.
Who owns Ramp 45th to I-5 N over Ramp NB I-5 to 50th?
It is owned by the State Highway Agency.