N.W.Sammamish Road over Issaquah Creek
FairKing County, Washington · 0.2 MI W of E Lk Samm Pkw · Structure no. 086297000000000
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 150 ft
- 1 main span
- Daily traffic
- 44,000
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
N.W.Sammamish Road over Issaquah Creek is a prestressed concrete stringer/multi-beam or girder carrying N.W.Sammamish Road over Issaquah Creek 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 44,000 vehicles a day, roughly 6% of them trucks, projected to reach 50,000 by 2040. The structure is 150 ft (45.7 m) long and 92 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| 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 N.W.Sammamish Road over Issaquah Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is N.W.Sammamish Road over Issaquah Creek 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 September 2023.
How much traffic does N.W.Sammamish Road over Issaquah Creek carry?
About 44,000 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is N.W.Sammamish Road over Issaquah Creek?
The structure is 150 ft (45.7 m) long with a longest span of 145 ft (44.2 m) and a deck 92 ft wide.
Who owns N.W.Sammamish Road over Issaquah Creek?
It is owned by the City or Municipal Highway Agency.