SR 20 over Chewuch River
PoorOkanogan County, Washington · 30.2 E Chelan CO · Structure no. 0006563A0000000
- Built
- 1961
- 64 years old, rebuilt 1990
- Condition
- Poor
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 125 ft
- 3 main spans
- Daily traffic
- 3,696
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Chewuch River is a concrete continuous box beam or girders - multiple carrying SR 20 over Chewuch River in Okanogan County, Washington. It was built in 1961 and reconstructed in 1990, so it is 64 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 3,696 vehicles a day, roughly 9% of them trucks, projected to reach 4,504 by 2039. The structure is 125 ft (38.1 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 SR 20 over Chewuch River built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1990.
What condition is SR 20 over Chewuch River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.
How much traffic does SR 20 over Chewuch River carry?
About 3,696 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is SR 20 over Chewuch River?
The structure is 125 ft (38.1 m) long with a longest span of 77 ft (23.5 m) and a deck 37 ft wide.
Who owns SR 20 over Chewuch River?
It is owned by the State Highway Agency.