SR 20 over Methow River
PoorOkanogan County, Washington · 30.8 E Chelan CO · Structure no. 0003722A0000000
- Built
- 1929
- 96 years old, rebuilt 1950
- Condition
- Poor
- inspected March 2023
- Type
- Truss - Thru
- Steel
- Length
- 335 ft
- 1 main span
- Daily traffic
- 4,683
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Methow River is a steel truss - thru carrying SR 20 over Methow River in Okanogan County, Washington. It was built in 1929 and reconstructed in 1950, so it is 96 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 4,683 vehicles a day, roughly 9% of them trucks, projected to reach 5,706 by 2039. The structure is 335 ft (102.2 m) long and 25 ft wide. If it were closed, the detour would be 16.8 mi (27 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 20 over Methow River built?
It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1950.
What condition is SR 20 over Methow 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 March 2023.
How much traffic does SR 20 over Methow River carry?
About 4,683 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is SR 20 over Methow River?
The structure is 335 ft (102.2 m) long with a longest span of 150 ft (45.7 m) and a deck 25 ft wide.
Who owns SR 20 over Methow River?
It is owned by the State Highway Agency.