Cape Horn Road over Alder Creek
FairSkagit County, Washington · 0.75 E JCT SR 20 · Structure no. 082345000000000
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected May 2024
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 41 ft
- 1 main span
- Daily traffic
- 227
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Cape Horn Road over Alder Creek is a prestressed concrete channel beam carrying Cape Horn Road over Alder Creek in Skagit County, Washington. It was built in 1972, so it is 53 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 6 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 227 vehicles a day, roughly 5% of them trucks, projected to reach 337 by 2041. The structure is 41 ft (12.5 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
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 Cape Horn Road over Alder Creek built?
It was built in 1972, making it 53 years old in 2025.
What condition is Cape Horn Road over Alder 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 May 2024.
How much traffic does Cape Horn Road over Alder Creek carry?
About 227 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Cape Horn Road over Alder Creek?
The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.
Who owns Cape Horn Road over Alder Creek?
It is owned by the County Highway Agency.