Robertson No.1
Key Takeaway
Robertson No.1 is classified as significant hazard in South Dakota. It was completed in 1975 and is 51 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 85.2% in SD) |
| Dam Length | 1,500 ft |
| Dam Type | Earth |
| Max Storage | 2.0K acre-ft |
| Normal Storage | 1.2K acre-ft |
| Max Discharge | 5,000 cfs |
| Year Completed | 1975 (51 years old) |
| NID ID | SD02190 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
HAROLD ROBERTSON
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Robertson No.1?
Robertson No.1 is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Robertson No.1?
Robertson No.1 is owned by HAROLD ROBERTSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Robertson No.1 built?
Robertson No.1 was completed in 1975, making it 51 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 Robertson No.1?
Robertson No.1 serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Robertson No.1?
Robertson No.1 has a dam height of 30 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 Robertson No.1 last inspected?
Robertson No.1 was last inspected on April 15, 1981. Inspection dates indicate when a formal review occurred, not the results of that inspection.