W Valley HWY over Mill CR
FairKing County, Washington · 0.7 MI S JCT SR-516 · Structure no. 000000FS0000000
- Built
- 1915
- 110 years old
- Condition
- Fair
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 24,100
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
W Valley HWY over Mill CR is a concrete arch - deck carrying W Valley HWY over Mill CR in King County, Washington. It was built in 1915, so it is 110 years old, older 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 24,100 vehicles a day, roughly 4% of them trucks, projected to reach 40,100 by 2040. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 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 |
|---|---|---|
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 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 W Valley HWY over Mill CR built?
It was built in 1915, making it 110 years old in 2025.
What condition is W Valley HWY over Mill CR 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 April 2024.
How much traffic does W Valley HWY over Mill CR carry?
About 24,100 vehicles per day (2020 count), of which roughly 4% are trucks.
How long is W Valley HWY over Mill CR?
The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.
Who owns W Valley HWY over Mill CR?
It is owned by the City or Municipal Highway Agency.