US 12 over I-5
FairLewis County, Washington · JCT I-5 · Structure no. 0005678A0000000
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 205 ft
- 4 main spans
- Daily traffic
- 7,961
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over I-5 is a prestressed concrete stringer/multi-beam or girder carrying US 12 over I-5 in Lewis County, Washington. It was built in 1958, so it is 67 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 7,961 vehicles a day, roughly 16% of them trucks, projected to reach 9,824 by 2039. The structure is 205 ft (62.5 m) long and 31 ft wide.
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over I-5 built?
It was built in 1958, making it 67 years old in 2025.
What condition is US 12 over I-5 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 November 2023.
How much traffic does US 12 over I-5 carry?
About 7,961 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is US 12 over I-5?
The structure is 205 ft (62.5 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.
Who owns US 12 over I-5?
It is owned by the State Highway Agency.