US 12 over Terrain
GoodGrays Harbor County, Washington · 1.1 E JCT US 101 · Structure no. 0001679A0000000
- Built
- 1933
- 92 years old, rebuilt 1994
- Condition
- Good
- inspected April 2024
- Type
- Tee Beam
- Concrete
- Length
- 142 ft
- 5 main spans
- Daily traffic
- 11,814
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Terrain is a concrete tee beam carrying US 12 over Terrain in Grays Harbor County, Washington. It was built in 1933 and reconstructed in 1994, so it is 92 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 11,814 vehicles a day, roughly 6% of them trucks, projected to reach 12,901 by 2039. The structure is 142 ft (43.3 m) long and 69 ft wide. If it were closed, the detour would be 24.9 mi (40 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 US 12 over Terrain built?
It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1994.
What condition is US 12 over Terrain 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 Terrain carry?
About 11,814 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 12 over Terrain?
The structure is 142 ft (43.3 m) long with a longest span of 44 ft (13.4 m) and a deck 69 ft wide.
Who owns US 12 over Terrain?
It is owned by the State Highway Agency.