I-90 EB over Humpback Creek
PoorKing County, Washington · 17.5 E JCT SR 202 · Structure no. 002000170000000
- Built
- 1972
- 53 years old, rebuilt 1986
- Condition
- Poor
- inspected July 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 18,894
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-90 EB over Humpback Creek is a concrete continuous culvert carrying I-90 EB over Humpback Creek in King County, Washington. It was built in 1972 and reconstructed in 1986, so it is 53 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 18,894 vehicles a day, roughly 18% of them trucks, projected to reach 25,526 by 2039. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-90 EB over Humpback Creek built?
It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1986.
What condition is I-90 EB over Humpback Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.
How much traffic does I-90 EB over Humpback Creek carry?
About 18,894 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is I-90 EB over Humpback Creek?
The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.5 m).
Who owns I-90 EB over Humpback Creek?
It is owned by the State Highway Agency.