S 102nd ST over Duwamish River
PoorPosted for loadKing County, Washington · S. 104th ST & S. 102nd ST · Structure no. 088972000000000
- Built
- 1957
- 68 years old, rebuilt 1995
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 395 ft
- 1 main span
- Daily traffic
- 100
- 2018 count
- Owner
- Private
- Private (other than railroad)
About this bridge
S 102nd ST over Duwamish River is a steel stringer/multi-beam or girder carrying S 102nd ST over Duwamish River in King County, Washington. It was built in 1957 and reconstructed in 1995, so it is 68 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. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 20% of them trucks, projected to reach 1 by 2038. The structure is 395 ft (120.4 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 102nd ST over Duwamish River built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1995.
What condition is S 102nd ST over Duwamish River 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 August 2024.
How much traffic does S 102nd ST over Duwamish River carry?
About 100 vehicles per day (2018 count), of which roughly 20% are trucks.
How long is S 102nd ST over Duwamish River?
The structure is 395 ft (120.4 m) long with a longest span of 92 ft (28 m) and a deck 34 ft wide.
Who owns S 102nd ST over Duwamish River?
It is owned by the Private (other than railroad).