Marine DR over Portage Slough
GoodWhatcom County, Washington · 0.06 Mi. W Ferndale · Structure no. 086325000000000
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected January 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 90 ft
- 1 main span
- Daily traffic
- 3,741
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Marine DR over Portage Slough is a prestressed concrete tee beam carrying Marine DR over Portage Slough in Whatcom County, Washington. It was built in 1997, so it is 28 years old, younger 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 3,741 vehicles a day, roughly 1% of them trucks, projected to reach 4,100 by 2045. The structure is 90 ft (27.4 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 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 Marine DR over Portage Slough built?
It was built in 1997, making it 28 years old in 2025.
What condition is Marine DR over Portage Slough 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 January 2023.
How much traffic does Marine DR over Portage Slough carry?
About 3,741 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is Marine DR over Portage Slough?
The structure is 90 ft (27.4 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.
Who owns Marine DR over Portage Slough?
It is owned by the County Highway Agency.