South Thorp HWY over Yakima River
FairPosted for loadKittitas County, Washington · 00.30 SW I-90 · Structure no. 084433000000000
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 434 ft
- 3 main spans
- Daily traffic
- 4,937
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
South Thorp HWY over Yakima River is a prestressed concrete continuous stringer/multi-beam or girder carrying South Thorp HWY over Yakima River in Kittitas County, Washington. It was built in 1967, so it is 58 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 4,937 vehicles a day, roughly 25% of them trucks, projected to reach 9,752 by 2038. The structure is 434 ft (132.3 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| 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 South Thorp HWY over Yakima River built?
It was built in 1967, making it 58 years old in 2025.
What condition is South Thorp HWY over Yakima River 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 November 2023.
How much traffic does South Thorp HWY over Yakima River carry?
About 4,937 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is South Thorp HWY over Yakima River?
The structure is 434 ft (132.3 m) long with a longest span of 190 ft (57.9 m) and a deck 34 ft wide.
Who owns South Thorp HWY over Yakima River?
It is owned by the County Highway Agency.