SH 29 over Eighteen Mile Creek
GoodLemhi County, Idaho · 0.24 East of Leadore · Structure no. 000000000013453
- Built
- 2019
- 6 years old
- Condition
- Good
- inspected August 2022
- Type
- Frame
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 180
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 29 over Eighteen Mile Creek is a concrete frame carrying SH 29 over Eighteen Mile Creek in Lemhi County, Idaho. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 180 vehicles a day, roughly 13% of them trucks, projected to reach 270 by 2042. The structure is 32 ft (9.8 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | 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 SH 29 over Eighteen Mile Creek built?
It was built in 2019, making it 6 years old in 2025.
What condition is SH 29 over Eighteen Mile Creek 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 August 2022.
How much traffic does SH 29 over Eighteen Mile Creek carry?
About 180 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is SH 29 over Eighteen Mile Creek?
The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.
Who owns SH 29 over Eighteen Mile Creek?
It is owned by the State Highway Agency.