Gary Larson Dam
Key Takeaway
Gary Larson Dam is classified as low hazard in South Dakota. It was completed in 1951 and is 75 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 22 ft (taller than 45.6% in SD) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 800 acre-ft |
| Normal Storage | 350 acre-ft |
| Surface Area | 84 acres |
| Drainage Area | 94 sq mi |
| Max Discharge | 15,652 cfs |
| Year Completed | 1951 (75 years old) |
| NID ID | SD01766 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
GARY LARSON
Private
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Gary Larson Dam?
Gary Larson Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Gary Larson Dam?
Gary Larson Dam is owned by GARY LARSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gary Larson Dam built?
Gary Larson Dam was completed in 1951, making it 75 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 Gary Larson Dam?
Gary Larson Dam 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 Gary Larson Dam?
Gary Larson Dam has a dam height of 22 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 Gary Larson Dam last inspected?
Gary Larson Dam was last inspected on April 15, 1980. Inspection dates indicate when a formal review occurred, not the results of that inspection.