US 12 over Cowlitz R Overflow
GoodLewis County, Washington · 8.1 E JCT SR 131 · Structure no. 0005889A0000000
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 74 ft
- 3 main spans
- Daily traffic
- 2,712
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Cowlitz R Overflow is a concrete continuous slab carrying US 12 over Cowlitz R Overflow 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 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 2,712 vehicles a day, roughly 19% of them trucks, projected to reach 4,281 by 2039. The structure is 74 ft (22.6 m) long and 42 ft wide. If it were closed, the detour would be 18 mi (29 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Cowlitz R Overflow built?
It was built in 1958, making it 67 years old in 2025.
What condition is US 12 over Cowlitz R Overflow 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 April 2024.
How much traffic does US 12 over Cowlitz R Overflow carry?
About 2,712 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is US 12 over Cowlitz R Overflow?
The structure is 74 ft (22.6 m) long with a longest span of 28 ft (8.5 m) and a deck 42 ft wide.
Who owns US 12 over Cowlitz R Overflow?
It is owned by the State Highway Agency.