15 Street NW over Mill Creek Wetland
FairKing County, Washington · 0.2 MI W of SR 169 · Structure no. 089183000000000
- Built
- 2014
- 11 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete
- Length
- 28 ft
- 1 main span
- Daily traffic
- 20,648
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
15 Street NW over Mill Creek Wetland is a concrete culvert carrying 15 Street NW over Mill Creek Wetland in King County, Washington. It was built in 2014, so it is 11 years old, younger than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 20,648 vehicles a day, roughly 13% of them trucks, projected to reach 25,000 by 2042. The structure is 28 ft (8.5 m) long and 130 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 15 Street NW over Mill Creek Wetland built?
It was built in 2014, making it 11 years old in 2025.
What condition is 15 Street NW over Mill Creek Wetland in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.
How much traffic does 15 Street NW over Mill Creek Wetland carry?
About 20,648 vehicles per day (2019 count), of which roughly 13% are trucks.
How long is 15 Street NW over Mill Creek Wetland?
The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 130 ft wide.
Who owns 15 Street NW over Mill Creek Wetland?
It is owned by the City or Municipal Highway Agency.