US 12 over Post Office Creek
FairIdaho County, Idaho · 48.1 E. Lowell · Structure no. 000000000010500
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected September 2021
- Type
- Tee Beam
- Concrete Continuous
- Length
- 75 ft
- 3 main spans
- Daily traffic
- 550
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Post Office Creek is a concrete continuous tee beam carrying US 12 over Post Office Creek in Idaho County, Idaho. It was built in 1960, so it is 65 years old, older than the Idaho average of 45.3 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 550 vehicles a day, roughly 31% of them trucks, projected to reach 825 by 2042. The structure is 75 ft (22.9 m) long and 32 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 | 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 Post Office Creek built?
It was built in 1960, making it 65 years old in 2025.
What condition is US 12 over Post Office Creek 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 September 2021.
How much traffic does US 12 over Post Office Creek carry?
About 550 vehicles per day (2023 count), of which roughly 31% are trucks.
How long is US 12 over Post Office Creek?
The structure is 75 ft (22.9 m) long with a longest span of 50 ft (15.2 m) and a deck 32 ft wide.
Who owns US 12 over Post Office Creek?
It is owned by the State Highway Agency.