Grindstone-Lost-Muddy Watershed Dam B- 21
Key Takeaway
Grindstone-Lost-Muddy Watershed Dam B- 21 is classified as high hazard in Missouri. It was completed in 1973 and is 53 years old. Its primary use is grade stabilization. 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 | 34 ft (taller than 82.3% in MO) |
| Dam Length | 700 ft |
| Dam Type | Earth |
| Max Storage | 316 acre-ft |
| Normal Storage | 166 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 236 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | MO10310 |
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
GRNSN-LS-MD WRSD SBDISTR
Local Government
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Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Grindstone-Lost-Muddy Watershed Dam B- 21?
Grindstone-Lost-Muddy Watershed Dam B- 21 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 Grindstone-Lost-Muddy Watershed Dam B- 21?
Grindstone-Lost-Muddy Watershed Dam B- 21 is owned by GRNSN-LS-MD WRSD SBDISTR (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grindstone-Lost-Muddy Watershed Dam B- 21 built?
Grindstone-Lost-Muddy Watershed Dam B- 21 was completed in 1973, making it 53 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 Grindstone-Lost-Muddy Watershed Dam B- 21?
Grindstone-Lost-Muddy Watershed Dam B- 21 serves the following purposes: Grade Stabilization. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Grindstone-Lost-Muddy Watershed Dam B- 21?
Grindstone-Lost-Muddy Watershed Dam B- 21 has a dam height of 34 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.