I-5 over NE 78th ST
FairClark County, Washington · 2.1 N JCT SR 500 · Structure no. 0015661G0000000
- Built
- 2001
- 24 years old
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 400 ft
- 3 main spans
- Daily traffic
- 36,997
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over NE 78th ST is a prestressed concrete continuous box beam or girders - multiple carrying I-5 over NE 78th ST in Clark County, Washington. It was built in 2001, so it is 24 years old, younger 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 36,997 vehicles a day, roughly 8% of them trucks, projected to reach 58,000 by 2039. The structure is 400 ft (121.9 m) long and 117 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over NE 78th ST built?
It was built in 2001, making it 24 years old in 2025.
What condition is I-5 over NE 78th ST 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 May 2024.
How much traffic does I-5 over NE 78th ST carry?
About 36,997 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is I-5 over NE 78th ST?
The structure is 400 ft (121.9 m) long with a longest span of 200 ft (61 m) and a deck 117 ft wide.
Who owns I-5 over NE 78th ST?
It is owned by the State Highway Agency.