SR 20 over Transmt. Oil Pipeline
GoodSkagit County, Washington · 12.1 E Island CO · Structure no. 0009353A0000000
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected March 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 73 ft
- 1 main span
- Daily traffic
- 19,145
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Transmt. Oil Pipeline is a prestressed concrete stringer/multi-beam or girder carrying SR 20 over Transmt. Oil Pipeline in Skagit County, Washington. It was built in 1972, so it is 53 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 19,145 vehicles a day, roughly 6% of them trucks, projected to reach 24,785 by 2039. The structure is 73 ft (22.3 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 20 over Transmt. Oil Pipeline built?
It was built in 1972, making it 53 years old in 2025.
What condition is SR 20 over Transmt. Oil Pipeline 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 March 2021.
How much traffic does SR 20 over Transmt. Oil Pipeline carry?
About 19,145 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is SR 20 over Transmt. Oil Pipeline?
The structure is 73 ft (22.3 m) long with a longest span of 68 ft (20.7 m) and a deck 38 ft wide.
Who owns SR 20 over Transmt. Oil Pipeline?
It is owned by the State Highway Agency.