Rockport Cascade over Illabot Creek (east)
FairSkagit County, Washington · 4.2 E JCT SR 530 · Structure no. 084672000000000
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 93 ft
- 1 main span
- Daily traffic
- 262
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Rockport Cascade over Illabot Creek (east) is a concrete stringer/multi-beam or girder carrying Rockport Cascade over Illabot Creek (east) in Skagit County, Washington. It was built in 1970, so it is 55 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 262 vehicles a day, roughly 15% of them trucks, projected to reach 320 by 2041. The structure is 93 ft (28.2 m) long and 31 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Rockport Cascade over Illabot Creek (east) built?
It was built in 1970, making it 55 years old in 2025.
What condition is Rockport Cascade over Illabot Creek (east) 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 June 2024.
How much traffic does Rockport Cascade over Illabot Creek (east) carry?
About 262 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is Rockport Cascade over Illabot Creek (east)?
The structure is 93 ft (28.2 m) long with a longest span of 88 ft (26.8 m) and a deck 31 ft wide.
Who owns Rockport Cascade over Illabot Creek (east)?
It is owned by the County Highway Agency.