SR 9 over Overflow Channel
GoodWhatcom County, Washington · 0.1 N JCT SR 542 · Structure no. 0003011B0000000
- Built
- 1945
- 80 years old
- Condition
- Good
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 68 ft
- 4 main spans
- Daily traffic
- 3,728
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 9 over Overflow Channel is a concrete continuous slab carrying SR 9 over Overflow Channel in Whatcom County, Washington. It was built in 1945, so it is 80 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 3,728 vehicles a day, roughly 15% of them trucks, projected to reach 5,751 by 2039. The structure is 68 ft (20.7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 9 over Overflow Channel built?
It was built in 1945, making it 80 years old in 2025.
What condition is SR 9 over Overflow Channel 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 9 over Overflow Channel carry?
About 3,728 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is SR 9 over Overflow Channel?
The structure is 68 ft (20.7 m) long with a longest span of 15 ft (4.6 m) and a deck 30 ft wide.
Who owns SR 9 over Overflow Channel?
It is owned by the State Highway Agency.