Birch Bay Lynden over Bertrand CR
FairWhatcom County, Washington · 00.3 W.Rathbone Rd. · Structure no. 082977000000000
- Built
- 1949
- 76 years old, rebuilt 1982
- Condition
- Fair
- inspected October 2023
- Type
- Slab
- Concrete
- Length
- 83 ft
- 4 main spans
- Daily traffic
- 8,369
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Birch Bay Lynden over Bertrand CR is a concrete slab carrying Birch Bay Lynden over Bertrand CR in Whatcom County, Washington. It was built in 1949 and reconstructed in 1982, so it is 76 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 8,369 vehicles a day, roughly 12% of them trucks, projected to reach 10,500 by 2040. The structure is 83 ft (25.3 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Birch Bay Lynden over Bertrand CR built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1982.
What condition is Birch Bay Lynden over Bertrand CR in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does Birch Bay Lynden over Bertrand CR carry?
About 8,369 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is Birch Bay Lynden over Bertrand CR?
The structure is 83 ft (25.3 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.
Who owns Birch Bay Lynden over Bertrand CR?
It is owned by the County Highway Agency.