51st Ave South over Southcenter Blvd
FairKing County, Washington · 0.06 MI N SR-518 Uc Br · Structure no. 086345000000000
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Single or Spread
- Concrete Continuous
- Length
- 222 ft
- 3 main spans
- Daily traffic
- 4,180
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
51st Ave South over Southcenter Blvd is a concrete continuous box beam or girders - single or spread carrying 51st Ave South over Southcenter Blvd in King County, Washington. It was built in 1996, so it is 29 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 4,180 vehicles a day, roughly 6% of them trucks, projected to reach 4,600 by 2042. The structure is 222 ft (67.7 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 51st Ave South over Southcenter Blvd built?
It was built in 1996, making it 29 years old in 2025.
What condition is 51st Ave South over Southcenter Blvd 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 2023.
How much traffic does 51st Ave South over Southcenter Blvd carry?
About 4,180 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is 51st Ave South over Southcenter Blvd?
The structure is 222 ft (67.7 m) long with a longest span of 104 ft (31.7 m) and a deck 40 ft wide.
Who owns 51st Ave South over Southcenter Blvd?
It is owned by the City or Municipal Highway Agency.