Johnson Creek Reservoir Dam
Key Takeaway
Johnson Creek Reservoir Dam is classified as high hazard in Washington. It was completed in 1982 and is 44 years old. Its primary use is irrigation. 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 Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 600 cfs |
| Year Completed | 1982 (44 years old) |
| NID ID | WA00446 |
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
Hartland Heights LLC
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Johnson Creek Reservoir Dam?
Johnson Creek Reservoir Dam 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 Johnson Creek Reservoir Dam?
Johnson Creek Reservoir Dam is owned by Hartland Heights LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson Creek Reservoir Dam built?
Johnson Creek Reservoir Dam was completed in 1982, making it 44 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 Johnson Creek Reservoir Dam?
Johnson Creek Reservoir Dam serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Johnson Creek Reservoir Dam last inspected?
Johnson Creek Reservoir Dam was last inspected on November 26, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.