Sycamore DR S.E. over Issaquah Ck.
FairKing County, Washington · 0.2 MI E of Iss-Hobart RD · Structure no. 085597000000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 550
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Sycamore DR S.E. over Issaquah Ck. is a prestressed concrete slab carrying Sycamore DR S.E. over Issaquah Ck. in King County, Washington. It was built in 1968, so it is 57 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 550 vehicles a day, roughly 5% of them trucks, projected to reach 600 by 2042. The structure is 61 ft (18.6 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Sycamore DR S.E. over Issaquah Ck. built?
It was built in 1968, making it 57 years old in 2025.
What condition is Sycamore DR S.E. over Issaquah Ck. 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 October 2024.
How much traffic does Sycamore DR S.E. over Issaquah Ck. carry?
About 550 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is Sycamore DR S.E. over Issaquah Ck.?
The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 29 ft wide.
Who owns Sycamore DR S.E. over Issaquah Ck.?
It is owned by the City or Municipal Highway Agency.