Shoshone Falls Dam 4
Key Takeaway
Shoshone Falls Dam 4 is classified as low hazard in Idaho. It was completed in 1907 and is 119 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 18 ft (taller than 20.1% in ID) |
| Dam Length | 380 ft |
| Dam Type | Gravity |
| Max Storage | 1.5K acre-ft |
| Normal Storage | 1.5K acre-ft |
| Surface Area | 86 acres |
| Drainage Area | 19,500 sq mi |
| Max Discharge | 12,000 cfs |
| Year Completed | 1907 (119 years old) |
| NID ID | ID00050 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Idaho Power Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Shoshone Falls Dam 4?
Shoshone Falls Dam 4 is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Shoshone Falls Dam 4?
Shoshone Falls Dam 4 is owned by Idaho Power Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Shoshone Falls Dam 4 built?
Shoshone Falls Dam 4 was completed in 1907, making it 119 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Shoshone Falls Dam 4?
Shoshone Falls Dam 4 serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Shoshone Falls Dam 4?
Shoshone Falls Dam 4 has a dam height of 18 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Shoshone Falls Dam 4 last inspected?
Shoshone Falls Dam 4 was last inspected on September 20, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.