SR 543 over I-5
GoodWhatcom County, Washington · JCT I-5 · Structure no. 0008934A0000000
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 252 ft
- 4 main spans
- Daily traffic
- 5,422
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 543 over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 543 over I-5 in Whatcom 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 5,422 vehicles a day, roughly 20% of them trucks, projected to reach 7,731 by 2039. The structure is 252 ft (76.8 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 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 543 over I-5 built?
It was built in 1971, making it 54 years old in 2025.
What condition is SR 543 over I-5 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 June 2024.
How much traffic does SR 543 over I-5 carry?
About 5,422 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is SR 543 over I-5?
The structure is 252 ft (76.8 m) long with a longest span of 70 ft (21.3 m) and a deck 25 ft wide.
Who owns SR 543 over I-5?
It is owned by the State Highway Agency.