SR 20 over Unnamed Tributary
GoodSkagit County, Washington · 28.7 E JCT SR 9 · Structure no. 0019764A0000000
- Built
- 2024
- 1 years old
- Condition
- Good
- inspected August 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 42 ft
- 1 main span
- Daily traffic
- 2,598
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Unnamed Tributary is a prestressed concrete slab carrying SR 20 over Unnamed Tributary in Skagit County, Washington. It was built in 2024, so it is 1 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,598 vehicles a day, roughly 10% of them trucks, projected to reach 5,123 by 2043. The structure is 42 ft (12.7 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| 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 Unnamed Tributary built?
It was built in 2024, making it 1 years old in 2025.
What condition is SR 20 over Unnamed Tributary 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 August 2024.
How much traffic does SR 20 over Unnamed Tributary carry?
About 2,598 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 20 over Unnamed Tributary?
The structure is 42 ft (12.7 m) long with a longest span of 38 ft (11.5 m) and a deck 43 ft wide.
Who owns SR 20 over Unnamed Tributary?
It is owned by the State Highway Agency.