Fourth Plain Road over SR 500
GoodClark County, Washington · 4.4 E JCT I-5 · Structure no. 0009448A0000000
- Built
- 1974
- 51 years old
- Condition
- Good
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 318 ft
- 4 main spans
- Daily traffic
- 18,150
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
Fourth Plain Road over SR 500 is a concrete continuous box beam or girders - multiple carrying Fourth Plain Road over SR 500 in Clark County, Washington. It was built in 1974, so it is 51 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 18,150 vehicles a day, roughly 15% of them trucks, projected to reach 29,911 by 2036. The structure is 318 ft (96.9 m) long and 81 ft wide. If it were closed, the detour would be 1.9 mi (3 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 Fourth Plain Road over SR 500 built?
It was built in 1974, making it 51 years old in 2025.
What condition is Fourth Plain Road over SR 500 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 Fourth Plain Road over SR 500 carry?
About 18,150 vehicles per day (2012 count), of which roughly 15% are trucks.
How long is Fourth Plain Road over SR 500?
The structure is 318 ft (96.9 m) long with a longest span of 109 ft (33.2 m) and a deck 81 ft wide.
Who owns Fourth Plain Road over SR 500?
It is owned by the State Highway Agency.