Crater Lake
Key Takeaway
Crater Lake is classified as low hazard in California. It was completed in 1937 and is 89 years old. Its primary use is water supply.
Physical Details
| Dam Height | 36 ft (taller than 40.1% in CA) |
| Dam Length | 220 ft |
| Dam Type | Earth |
| Max Storage | 320 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1937 (89 years old) |
| NID ID | CA00630 |
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
Private Entity
Private
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Low Hazard 74 ftFrequently Asked Questions
What is the hazard classification of Crater Lake?
Crater Lake 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 Crater Lake?
Crater Lake is owned by Private Entity (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Crater Lake built?
Crater Lake was completed in 1937, making it 89 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 Crater Lake?
Crater Lake serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Crater Lake?
Crater Lake has a dam height of 36 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 Crater Lake last inspected?
Crater Lake was last inspected on June 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.