I-5 over Lewis River
PoorPosted for loadClark County, Washington · 5.8 N JCT SR 501 · Structure no. 0002559A0000000
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected March 2023
- Type
- Truss - Thru
- Steel Continuous
- Length
- 1,310 ft
- 3 main spans
- Daily traffic
- 41,939
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Lewis River is a steel continuous truss - thru carrying I-5 over Lewis River in Clark County, Washington. It was built in 1940, so it is 85 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 41,939 vehicles a day, roughly 15% of them trucks, projected to reach 60,401 by 2039. The structure is 1,310 ft (399.3 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Lewis River built?
It was built in 1940, making it 85 years old in 2025.
What condition is I-5 over Lewis River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.
How much traffic does I-5 over Lewis River carry?
About 41,939 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is I-5 over Lewis River?
The structure is 1,310 ft (399.3 m) long with a longest span of 324 ft (98.8 m) and a deck 49 ft wide.
Who owns I-5 over Lewis River?
It is owned by the State Highway Agency.