I-5 over SR 503
GoodCowlitz County, Washington · 0.4 N Clark CO · Structure no. 0007064A0000000
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 168 ft
- 3 main spans
- Daily traffic
- 33,156
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over SR 503 is a prestressed concrete stringer/multi-beam or girder carrying I-5 over SR 503 in Cowlitz 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 33,156 vehicles a day, roughly 15% of them trucks, projected to reach 43,558 by 2039. The structure is 168 ft (51.2 m) long and 48 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 SR 503 built?
It was built in 1963, making it 62 years old in 2025.
What condition is I-5 over SR 503 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 October 2023.
How much traffic does I-5 over SR 503 carry?
About 33,156 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is I-5 over SR 503?
The structure is 168 ft (51.2 m) long with a longest span of 82 ft (25 m) and a deck 48 ft wide.
Who owns I-5 over SR 503?
It is owned by the State Highway Agency.