Tinkham Road over S.Fk. Snoqualmie
GoodKing County, Washington · I90 East Exit 42 · Structure no. 060505000032683
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected August 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 181 ft
- 3 main spans
- Daily traffic
- 120
- 2017 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Tinkham Road over S.Fk. Snoqualmie is a prestressed concrete stringer/multi-beam or girder carrying Tinkham Road over S.Fk. Snoqualmie in King County, Washington. It was built in 1972, so it is 53 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 120 vehicles a day, roughly 20% of them trucks, projected to reach 180 by 2045. The structure is 181 ft (55.2 m) long and 28 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Tinkham Road over S.Fk. Snoqualmie built?
It was built in 1972, making it 53 years old in 2025.
What condition is Tinkham Road over S.Fk. Snoqualmie in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2021.
How much traffic does Tinkham Road over S.Fk. Snoqualmie carry?
About 120 vehicles per day (2017 count), of which roughly 20% are trucks.
How long is Tinkham Road over S.Fk. Snoqualmie?
The structure is 181 ft (55.2 m) long with a longest span of 81 ft (24.7 m) and a deck 28 ft wide.
Who owns Tinkham Road over S.Fk. Snoqualmie?
It is owned by the U.S. Forest Service.