Potlatch Road over Agatha Creek Trestle
PoorPosted for loadShoshone County, Idaho · 5.7 E. Calder · Structure no. 000000000030994
- Built
- 1912
- 113 years old, rebuilt 1991
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 112 ft
- 8 main spans
- Daily traffic
- 100
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Potlatch Road over Agatha Creek Trestle is a wood or timber stringer/multi-beam or girder carrying Potlatch Road over Agatha Creek Trestle in Shoshone County, Idaho. It was built in 1912 and reconstructed in 1991, so it is 113 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2039. The structure is 112 ft (34.1 m) long and 14 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Potlatch Road over Agatha Creek Trestle built?
It was built in 1912, making it 113 years old in 2025. It was reconstructed in 1991.
What condition is Potlatch Road over Agatha Creek Trestle in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.
How much traffic does Potlatch Road over Agatha Creek Trestle carry?
About 100 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Potlatch Road over Agatha Creek Trestle?
The structure is 112 ft (34.1 m) long with a longest span of 14 ft (4.3 m) and a deck 14 ft wide.
Who owns Potlatch Road over Agatha Creek Trestle?
It is owned by the County Highway Agency.