Rockport Cascade R over Illabot Creek (west)
GoodSkagit County, Washington · 4.2 E JCT SR 530 · Structure no. 089018000000000
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 105 ft
- 1 main span
- Daily traffic
- 262
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Rockport Cascade R over Illabot Creek (west) is a prestressed concrete stringer/multi-beam or girder carrying Rockport Cascade R over Illabot Creek (west) in Skagit County, Washington. It was built in 2018, so it is 7 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 262 vehicles a day, roughly 15% of them trucks, projected to reach 320 by 2041. The structure is 105 ft (32 m) long and 31 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rockport Cascade R over Illabot Creek (west) built?
It was built in 2018, making it 7 years old in 2025.
What condition is Rockport Cascade R over Illabot Creek (west) 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 September 2024.
How much traffic does Rockport Cascade R over Illabot Creek (west) carry?
About 262 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is Rockport Cascade R over Illabot Creek (west)?
The structure is 105 ft (32 m) long with a longest span of 98 ft (29.8 m) and a deck 31 ft wide.
Who owns Rockport Cascade R over Illabot Creek (west)?
It is owned by the County Highway Agency.