I-5 over Transmt. Oil Pipeline
GoodWhatcom County, Washington · 5.0 N JCT SR 539 · Structure no. 0009375A0000000
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected April 2023
- Type
- Slab
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 26,177
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Transmt. Oil Pipeline is a concrete slab carrying I-5 over Transmt. Oil Pipeline in Whatcom 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 26,177 vehicles a day, roughly 7% of them trucks, projected to reach 38,397 by 2039. The structure is 32 ft (9.8 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Transmt. Oil Pipeline built?
It was built in 1972, making it 53 years old in 2025.
What condition is I-5 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 April 2023.
How much traffic does I-5 over Transmt. Oil Pipeline carry?
About 26,177 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is I-5 over Transmt. Oil Pipeline?
The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.
Who owns I-5 over Transmt. Oil Pipeline?
It is owned by the State Highway Agency.