Tioga Lake Auxiliary
Key Takeaway
Tioga Lake Auxiliary is classified as high hazard in California. It was completed in 1928 and is 98 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 19 ft (taller than 14.1% in CA) |
| Dam Length | 50 ft |
| Dam Type | Concrete |
| Max Storage | 1.3K acre-ft |
| Normal Storage | 1.3K acre-ft |
| Surface Area | 73 acres |
| Max Discharge | 690 cfs |
| Year Completed | 1928 (98 years old) |
| NID ID | CA00456 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Southern California Edison Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Tioga Lake Auxiliary?
Tioga Lake Auxiliary is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Tioga Lake Auxiliary?
Tioga Lake Auxiliary is owned by Southern California Edison Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tioga Lake Auxiliary built?
Tioga Lake Auxiliary was completed in 1928, making it 98 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 Tioga Lake Auxiliary?
Tioga Lake Auxiliary 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 Tioga Lake Auxiliary?
Tioga Lake Auxiliary has a dam height of 19 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 Tioga Lake Auxiliary last inspected?
Tioga Lake Auxiliary was last inspected on July 19, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.