Summit Flat Road over Grimes Creek
GoodBoise County, Idaho · 5 MI SW of Pine Flats Cg · Structure no. 040203000001067
- Built
- 1982
- 43 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 30 ft
- 1 main span
- Daily traffic
- 12
- 1992 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Summit Flat Road over Grimes Creek is a wood or timber stringer/multi-beam or girder carrying Summit Flat Road over Grimes Creek in Boise County, Idaho. It was built in 1982, so it is 43 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 12 vehicles a day, projected to reach 18 by 2045. The structure is 30 ft (9.1 m) long and 15 ft wide. If it were closed, the detour would be 27.3 mi (44 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Summit Flat Road over Grimes Creek built?
It was built in 1982, making it 43 years old in 2025.
What condition is Summit Flat Road over Grimes 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 September 2024.
How much traffic does Summit Flat Road over Grimes Creek carry?
About 12 vehicles per day (1992 count).
How long is Summit Flat Road over Grimes Creek?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 15 ft wide.
Who owns Summit Flat Road over Grimes Creek?
It is owned by the U.S. Forest Service.