Ewing
Key Takeaway
Ewing is classified as high hazard in California. It was completed in 1972 and is 54 years old. Its primary use is water supply. 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 | 63 ft (taller than 69.2% in CA) |
| Dam Length | 550 ft |
| Dam Type | Earth |
| Max Storage | 887 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1972 (54 years old) |
| NID ID | CA00903 |
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
Trinity County Waterworks District 1
Local Government
Frequently Asked Questions
What is the hazard classification of Ewing?
Ewing 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 Ewing?
Ewing is owned by Trinity County Waterworks District 1 (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Ewing built?
Ewing was completed in 1972, making it 54 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 Ewing?
Ewing serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Ewing?
Ewing has a dam height of 63 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 Ewing last inspected?
Ewing was last inspected on June 6, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.