SR 20 over Granite Creek
GoodSkagit County, Washington · 2.5 E Whatcom CO · Structure no. 0008963C0000000
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 1,120
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Granite Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 20 over Granite Creek in Skagit County, Washington. It was built in 1971, so it is 54 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,120 vehicles a day, roughly 9% of them trucks, projected to reach 1,698 by 2039. The structure is 200 ft (61 m) long and 35 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 20 over Granite Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is SR 20 over Granite Creek 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 Granite Creek carry?
About 1,120 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is SR 20 over Granite Creek?
The structure is 200 ft (61 m) long with a longest span of 100 ft (30.5 m) and a deck 35 ft wide.
Who owns SR 20 over Granite Creek?
It is owned by the State Highway Agency.