Granite Lake
Key Takeaway
Granite Lake is classified as significant hazard in Idaho. It was completed in 1949 and is 77 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 43.7% in ID) |
| Dam Length | 1,460 ft |
| Normal Storage | 2.9K acre-ft |
| Surface Area | 195 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 73 cfs |
| Year Completed | 1949 (77 years old) |
| Year Modified | 1963 |
| NID ID | ID00245 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Granite Lake?
Granite Lake is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Granite Lake?
Granite Lake is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Granite Lake built?
Granite Lake was completed in 1949, making it 77 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 Granite Lake?
Granite Lake serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Granite Lake?
Granite Lake has a dam height of 25 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 Granite Lake last inspected?
Granite Lake was last inspected on July 3, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.