I-5 over Colony RD
GoodSkagit County, Washington · 8.8 N JCT SR 11 · Structure no. 0007260A0000000
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 258 ft
- 4 main spans
- Daily traffic
- 24,437
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Colony RD is a prestressed concrete stringer/multi-beam or girder carrying I-5 over Colony RD in Skagit County, Washington. It was built in 1963, so it is 62 years old, older 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 24,437 vehicles a day, roughly 7% of them trucks, projected to reach 35,328 by 2039. The structure is 258 ft (78.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Colony RD built?
It was built in 1963, making it 62 years old in 2025.
What condition is I-5 over Colony RD 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 March 2023.
How much traffic does I-5 over Colony RD carry?
About 24,437 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is I-5 over Colony RD?
The structure is 258 ft (78.6 m) long with a longest span of 75 ft (22.9 m) and a deck 35 ft wide.
Who owns I-5 over Colony RD?
It is owned by the State Highway Agency.