Roaring River Road over Middle Fork Boise River
PoorElmore County, Idaho · 4.5 MI Wsw Dutch CR Cabin · Structure no. 040201000001159
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 140 ft
- 3 main spans
- Daily traffic
- 20
- 1992 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Roaring River Road over Middle Fork Boise River is a concrete stringer/multi-beam or girder carrying Roaring River Road over Middle Fork Boise River in Elmore County, Idaho. It was built in 1957, so it is 68 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.
It carries about 20 vehicles a day, projected to reach 30 by 2045. The structure is 140 ft (42.8 m) long and 16 ft wide. If it were closed, the detour would be 30.4 mi (49 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Roaring River Road over Middle Fork Boise River built?
It was built in 1957, making it 68 years old in 2025.
What condition is Roaring River Road over Middle Fork Boise River 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 September 2023.
How much traffic does Roaring River Road over Middle Fork Boise River carry?
About 20 vehicles per day (1992 count).
How long is Roaring River Road over Middle Fork Boise River?
The structure is 140 ft (42.8 m) long with a longest span of 53 ft (16.2 m) and a deck 16 ft wide.
Who owns Roaring River Road over Middle Fork Boise River?
It is owned by the U.S. Forest Service.