Lake Harmony Dam
Key Takeaway
Lake Harmony Dam is classified as high hazard in Missouri. It was completed in 1870 and is 156 years old. Its primary use is recreation. 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 | 21 ft (taller than 13.3% in MO) |
| Dam Type | Gravity |
| Max Storage | 416 acre-ft |
| Normal Storage | 185 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 2,175 sq mi |
| Year Completed | 1870 (156 years old) |
| NID ID | MO30612 |
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
LK HARMONY PROP OWN ASSO
Private
Nearby Dams
Deer Run Lake Dam
Madison, MO
High Hazard 43 ftMine Lamotte Dam
Madison, MO
High Hazard 27 ftSlime Pond Dam
Madison, MO
High Hazard 33 ftFawn Lake Dam
St. Francois, MO
Low Hazard 25 ftFredericktown City Dam
Madison, MO
High Hazard 24 ftNims Lake Dam
Madison, MO
High Hazard 57 ftLost Valley Lake Dam
Madison, MO
High Hazard 38 ftJohn Bollinger No. 1 Dam
Madison, MO
High Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Lake Harmony Dam?
Lake Harmony 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 Lake Harmony Dam?
Lake Harmony Dam is owned by LK HARMONY PROP OWN ASSO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Harmony Dam built?
Lake Harmony Dam was completed in 1870, making it 156 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 Lake Harmony Dam?
Lake Harmony Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Harmony Dam?
Lake Harmony Dam has a dam height of 21 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 Lake Harmony Dam last inspected?
Lake Harmony Dam was last inspected on September 5, 1979. Inspection dates indicate when a formal review occurred, not the results of that inspection.