Leonard Johnson
Key Takeaway
Leonard Johnson is classified as low hazard in California. It was completed in 1948 and is 78 years old. Its primary use is water supply.
Physical Details
| Dam Height | 18 ft (taller than 12.6% in CA) |
| Dam Length | 720 ft |
| Dam Type | Earth |
| Max Storage | 120 acre-ft |
| Surface Area | 1,125 acres |
| Drainage Area | 5 sq mi |
| Year Completed | 1948 (78 years old) |
| NID ID | CA00492 |
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
Russ Ranch Company, LLC
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Leonard Johnson?
Leonard Johnson 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 Leonard Johnson?
Leonard Johnson is owned by Russ Ranch Company, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Leonard Johnson built?
Leonard Johnson was completed in 1948, making it 78 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 Leonard Johnson?
Leonard Johnson 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 Leonard Johnson?
Leonard Johnson 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 Leonard Johnson last inspected?
Leonard Johnson was last inspected on June 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.