South Thorp HWY over Westside Ditch
FairPosted for loadKittitas County, Washington · 00.10 N Thorp Cem R · Structure no. 081620000000000
- Built
- 1926
- 99 years old, rebuilt 1974
- Condition
- Fair
- inspected November 2024
- Type
- Slab
- Concrete Continuous
- Length
- 30 ft
- 1 main span
- Daily traffic
- 959
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
South Thorp HWY over Westside Ditch is a concrete continuous slab carrying South Thorp HWY over Westside Ditch in Kittitas County, Washington. It was built in 1926 and reconstructed in 1974, so it is 99 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 5 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 other load-capacity restriction.
It carries about 959 vehicles a day, roughly 32% of them trucks, projected to reach 2,541 by 2044. The structure is 30 ft (9.1 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was South Thorp HWY over Westside Ditch built?
It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1974.
What condition is South Thorp HWY over Westside Ditch 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 2024.
How much traffic does South Thorp HWY over Westside Ditch carry?
About 959 vehicles per day (2024 count), of which roughly 32% are trucks.
How long is South Thorp HWY over Westside Ditch?
The structure is 30 ft (9.1 m) long with a longest span of 25 ft (7.6 m) and a deck 31 ft wide.
Who owns South Thorp HWY over Westside Ditch?
It is owned by the County Highway Agency.