N.W.Gilman Blvd. over Issaquah Ck.
FairPosted for loadKing County, Washington · 0.5 MI S of I-90 · Structure no. 085477000000000
- Built
- 1940
- 85 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 105 ft
- 1 main span
- Daily traffic
- 23,500
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
N.W.Gilman Blvd. over Issaquah Ck. is a concrete stringer/multi-beam or girder carrying N.W.Gilman Blvd. over Issaquah Ck. in King County, Washington. It was built in 1940, so it is 85 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 23,500 vehicles a day, roughly 5% of them trucks, projected to reach 32,000 by 2042. The structure is 105 ft (32 m) long and 62 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 N.W.Gilman Blvd. over Issaquah Ck. built?
It was built in 1940, making it 85 years old in 2025.
What condition is N.W.Gilman Blvd. 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 N.W.Gilman Blvd. over Issaquah Ck. carry?
About 23,500 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is N.W.Gilman Blvd. over Issaquah Ck.?
The structure is 105 ft (32 m) long with a longest span of 65 ft (19.8 m) and a deck 62 ft wide.
Who owns N.W.Gilman Blvd. over Issaquah Ck.?
It is owned by the City or Municipal Highway Agency.