Green Valley Farm
Key Takeaway
Green Valley Farm is classified as high hazard in Missouri. It was completed in 1972 and is 54 years old. Its primary use is fire protection. 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 | 25 ft (taller than 23.5% in MO) |
| Dam Type | Earth |
| Max Storage | 54 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 40 sq mi |
| Year Completed | 1972 (54 years old) |
| NID ID | MO30184 |
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
ROGER OSTHOFF
Private
Nearby Dams
Bair, Jim Dam
St. Charles, MO
High Hazard 22 ftSadler Lake Dam
St. Charles, MO
Significant Hazard 25 ftFordyce Lake Dam
St. Charles, MO
Low Hazard 25 ftBair Lake Dam
St. Charles, MO
High Hazard 32 ftStruckhoffs Lake Dam
St. Charles, MO
High Hazard 37 ftPoepsel Farm Lake Dam
St. Charles, MO
High Hazard 32 ftStruckhoff Lake Dam Sec 11
St. Charles, MO
Low Hazard 30 ftHinnah Lake Dam
St. Charles, MO
Low Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Green Valley Farm?
Green Valley Farm 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 Green Valley Farm?
Green Valley Farm is owned by ROGER OSTHOFF (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Green Valley Farm built?
Green Valley Farm was completed in 1972, making it 54 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 Green Valley Farm?
Green Valley Farm serves the following purposes: 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.
How tall is Green Valley Farm?
Green Valley Farm has a dam height of 25 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 Green Valley Farm last inspected?
Green Valley Farm was last inspected on March 27, 1981. Inspection dates indicate when a formal review occurred, not the results of that inspection.