Johnson
Key Takeaway
Johnson is classified as high hazard in Colorado. It was completed in 1982 and is 44 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 | 41 ft (taller than 82.7% in CO) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 1.3K acre-ft |
| Normal Storage | 1.0K acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,750 cfs |
| Year Completed | 1982 (44 years old) |
| NID ID | CO01404 |
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
LAKE DURANGO WATER AUTHORITY
Private
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High Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Johnson?
Johnson 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?
Johnson is owned by LAKE DURANGO WATER AUTHORITY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson built?
Johnson 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?
Johnson 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 Johnson?
Johnson has a dam height of 41 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 Johnson last inspected?
Johnson was last inspected on November 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.