US 12 over Slide Area
FairLewis County, Washington · 5.0 E JCT SR 123 · Structure no. 0008416A0000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 118 ft
- 1 main span
- Daily traffic
- 1,774
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Slide Area is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Slide Area in Lewis County, Washington. It was built in 1968, so it is 57 years old, older 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 1,774 vehicles a day, roughly 27% of them trucks, projected to reach 2,047 by 2039. The structure is 118 ft (36 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Slide Area built?
It was built in 1968, making it 57 years old in 2025.
What condition is US 12 over Slide Area 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 October 2023.
How much traffic does US 12 over Slide Area carry?
About 1,774 vehicles per day (2023 count), of which roughly 27% are trucks.
How long is US 12 over Slide Area?
The structure is 118 ft (36 m) long with a longest span of 114 ft (34.7 m) and a deck 41 ft wide.
Who owns US 12 over Slide Area?
It is owned by the State Highway Agency.