Little Johnny
Key Takeaway
Little Johnny is classified as low hazard in Colorado. It was completed in 1954 and is 72 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 29 ft (taller than 64% in CO) |
| Dam Length | 354 ft |
| Dam Type | Earth |
| Max Storage | 50 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,381 cfs |
| Year Completed | 1954 (72 years old) |
| NID ID | CO00467 |
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
JOHN G. HARVEY
Private
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Significant Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Little Johnny?
Little Johnny 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 Little Johnny?
Little Johnny is owned by JOHN G. HARVEY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Little Johnny built?
Little Johnny was completed in 1954, making it 72 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 Little Johnny?
Little Johnny serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Little Johnny?
Little Johnny has a dam height of 29 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 Little Johnny last inspected?
Little Johnny was last inspected on June 29, 1992. Inspection dates indicate when a formal review occurred, not the results of that inspection.