Thorp Prairie Road over Hiline Canal
GoodKittitas County, Washington · 01.38 E I-90 X-Ing · Structure no. 081326000000000
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Prestressed Concrete Continuous
- Length
- 79 ft
- 1 main span
- Daily traffic
- 432
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Thorp Prairie Road over Hiline Canal is a prestressed concrete continuous tee beam carrying Thorp Prairie Road over Hiline Canal in Kittitas County, Washington. It was built in 1979, so it is 46 years old, younger 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 432 vehicles a day, roughly 26% of them trucks, projected to reach 1,144 by 2042. The structure is 79 ft (24.1 m) long and 29 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Thorp Prairie Road over Hiline Canal built?
It was built in 1979, making it 46 years old in 2025.
What condition is Thorp Prairie Road over Hiline Canal 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 October 2024.
How much traffic does Thorp Prairie Road over Hiline Canal carry?
About 432 vehicles per day (2022 count), of which roughly 26% are trucks.
How long is Thorp Prairie Road over Hiline Canal?
The structure is 79 ft (24.1 m) long with a longest span of 77 ft (23.5 m) and a deck 29 ft wide.
Who owns Thorp Prairie Road over Hiline Canal?
It is owned by the County Highway Agency.