Tinkham RD over I-90
FairPosted for loadKing County, Washington · 11.7 E JCT SR 202 · Structure no. 0009217A0000000
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 358 ft
- 3 main spans
- Daily traffic
- 71
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
Tinkham RD over I-90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Tinkham RD over I-90 in King County, Washington. It was built in 1973, so it is 52 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 71 vehicles a day, roughly 5% of them trucks. The structure is 358 ft (109.1 m) long and 30 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Tinkham RD over I-90 built?
It was built in 1973, making it 52 years old in 2025.
What condition is Tinkham RD over I-90 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 2023.
How much traffic does Tinkham RD over I-90 carry?
About 71 vehicles per day (2012 count), of which roughly 5% are trucks.
How long is Tinkham RD over I-90?
The structure is 358 ft (109.1 m) long with a longest span of 130 ft (39.6 m) and a deck 30 ft wide.
Who owns Tinkham RD over I-90?
It is owned by the State Highway Agency.