Colorado Ave over SR 99
GoodKing County, Washington · 3.9 N JCT SR 509 · Structure no. 0018290A0000000
- Built
- 2013
- 12 years old
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 551 ft
- 3 main spans
- Daily traffic
- 8,000
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
Colorado Ave over SR 99 is a prestressed concrete continuous box beam or girders - multiple carrying Colorado Ave over SR 99 in King County, Washington. It was built in 2013, so it is 12 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 8,000 vehicles a day, roughly 10% of them trucks, projected to reach 10,400 by 2032. The structure is 551 ft (167.9 m) long and 51 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Colorado Ave over SR 99 built?
It was built in 2013, making it 12 years old in 2025.
What condition is Colorado Ave over SR 99 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 February 2024.
How much traffic does Colorado Ave over SR 99 carry?
About 8,000 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Colorado Ave over SR 99?
The structure is 551 ft (167.9 m) long with a longest span of 116 ft (35.4 m) and a deck 51 ft wide.
Who owns Colorado Ave over SR 99?
It is owned by the State Highway Agency.