Potlatch Road over Big Creek Trestle
PoorPosted for loadShoshone County, Idaho · 4.1 E. Calder · Structure no. 000000000030993
- Built
- 1912
- 113 years old, rebuilt 1991
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 74 ft
- 1 main span
- Daily traffic
- 100
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Potlatch Road over Big Creek Trestle is a steel stringer/multi-beam or girder carrying Potlatch Road over Big 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 2 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 74 ft (22.6 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Potlatch Road over Big 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 Big 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 Big Creek Trestle carry?
About 100 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Potlatch Road over Big Creek Trestle?
The structure is 74 ft (22.6 m) long with a longest span of 70 ft (21.3 m) and a deck 14 ft wide.
Who owns Potlatch Road over Big Creek Trestle?
It is owned by the County Highway Agency.