Okkapassa Dam
Key Takeaway
Okkapassa Dam is classified as high hazard in Missouri. It was completed in 1950 and is 76 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 | 28 ft (taller than 54.3% in MO) |
| Dam Type | Buttress |
| Max Storage | 180 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 1,817 sq mi |
| Year Completed | 1950 (76 years old) |
| NID ID | MO30164 |
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
MRS LORAINE PERSHALL
Private
Nearby Dams
Sela Land Dam
Reynolds, MO
High Hazard 30 ftTaum Sauk Ps Lower
Reynolds, MO
High Hazard 60 ftWiggins Ozark Camp Dam
Reynolds, MO
High Hazard 28 ftTaum Sauk Ps Upper
Reynolds, MO
High Hazard 125 ftAsarco Sec 11 Lower Dam (Shallow)
Iron, MO
Low Hazard 25 ftAsarco Lake Dam
Iron, MO
High Hazard 50 ftAsarco Sec 11 Upper Dam (Shallow)
Iron, MO
Low Hazard 25 ftLawless Lake Dam
Iron, MO
High Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Okkapassa Dam?
Okkapassa 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 Okkapassa Dam?
Okkapassa Dam is owned by MRS LORAINE PERSHALL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Okkapassa Dam built?
Okkapassa Dam was completed in 1950, making it 76 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 Okkapassa Dam?
Okkapassa 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 Okkapassa Dam?
Okkapassa Dam has a dam height of 28 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 Okkapassa Dam last inspected?
Okkapassa Dam was last inspected on April 30, 1979. Inspection dates indicate when a formal review occurred, not the results of that inspection.