Mosquito Lk RD over Porter Creek
FairWhatcom County, Washington · 10.3 E Valley Hwy. · Structure no. 081410000000000
- Built
- 1936
- 89 years old, rebuilt 2010
- Condition
- Fair
- inspected February 2023
- Type
- Channel Beam
- Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 162
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Mosquito Lk RD over Porter Creek is a concrete channel beam carrying Mosquito Lk RD over Porter Creek in Whatcom County, Washington. It was built in 1936 and reconstructed in 2010, so it is 89 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 162 vehicles a day, roughly 14% of them trucks, projected to reach 300 by 2045. The structure is 31 ft (9.4 m) long and 26 ft wide. If it were closed, the detour would be 21.1 mi (34 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mosquito Lk RD over Porter Creek built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2010.
What condition is Mosquito Lk RD over Porter Creek 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 February 2023.
How much traffic does Mosquito Lk RD over Porter Creek carry?
About 162 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is Mosquito Lk RD over Porter Creek?
The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.
Who owns Mosquito Lk RD over Porter Creek?
It is owned by the County Highway Agency.