Old Chilly RD over Big Lost River
GoodCuster County, Idaho · 9.6 N 12.7 W Mackay · Structure no. 000000000031746
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 80 ft
- 1 main span
- Daily traffic
- 40
- 2023 count
- Owner
- Local
- Other Local Agency
About this bridge
Old Chilly RD over Big Lost River is a steel stringer/multi-beam or girder carrying Old Chilly RD over Big Lost River in Custer County, Idaho. It was built in 2023, so it is 2 years old, younger than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 40 vehicles a day, roughly 5% of them trucks, projected to reach 60 by 2042. The structure is 80 ft (24.4 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 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 | 9 Excellent | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 9 Excellent | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Chilly RD over Big Lost River built?
It was built in 2023, making it 2 years old in 2025.
What condition is Old Chilly RD over Big Lost River 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 July 2023.
How much traffic does Old Chilly RD over Big Lost River carry?
About 40 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Old Chilly RD over Big Lost River?
The structure is 80 ft (24.4 m) long with a longest span of 79 ft (24.2 m) and a deck 32 ft wide.
Who owns Old Chilly RD over Big Lost River?
It is owned by the Other Local Agency.