Dresser Minerals #7 Dam South (Dry)
Key Takeaway
Dresser Minerals #7 Dam South (Dry) is classified as high hazard in Missouri. It was completed in 1950 and is 76 years old. Its primary use is tailings. 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 | 35 ft (taller than 85.5% in MO) |
| Dam Length | 4,000 ft |
| Dam Type | Rockfill |
| Max Storage | 80 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 37 sq mi |
| Year Completed | 1950 (76 years old) |
| NID ID | MO31147 |
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
BIG RIVER LAND COMPANY
Private
Nearby Dams
Dresser Minerals No 7 Dam (Dry)
Washington, MO
Low Hazard 30 ftDresser Minerals #7 Dam North(Dry)
Washington, MO
High Hazard 15 ftMineral Point #1
Washington, MO
High Hazard 72 ftOld Wolf Dam
Washington, MO
High Hazard 48 ftMineral Point #2
Washington, MO
High Hazard 89 ftCadet No. 1 Dam
Washington, MO
High Hazard 53 ftBlack Tailings Dam
Washington, MO
High Hazard 70 ftCadet No. 2 Dam
Washington, MO
High Hazard 77 ftFrequently Asked Questions
What is the hazard classification of Dresser Minerals #7 Dam South (Dry)?
Dresser Minerals #7 Dam South (Dry) 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 Dresser Minerals #7 Dam South (Dry)?
Dresser Minerals #7 Dam South (Dry) is owned by BIG RIVER LAND COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Dresser Minerals #7 Dam South (Dry) built?
Dresser Minerals #7 Dam South (Dry) 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 Dresser Minerals #7 Dam South (Dry)?
Dresser Minerals #7 Dam South (Dry) serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Dresser Minerals #7 Dam South (Dry)?
Dresser Minerals #7 Dam South (Dry) has a dam height of 35 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 Dresser Minerals #7 Dam South (Dry) last inspected?
Dresser Minerals #7 Dam South (Dry) was last inspected on August 11, 1986. Inspection dates indicate when a formal review occurred, not the results of that inspection.