Tolna Dam 1
Key Takeaway
Tolna Dam 1 is classified as significant hazard in North Dakota. It was completed in 1936 and is 90 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 86.1% in ND) |
| Dam Length | 520 ft |
| Dam Type | Earth |
| Max Storage | 3.1K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 166 acres |
| Drainage Area | 40 sq mi |
| Year Completed | 1936 (90 years old) |
| NID ID | ND00027 |
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
Nelson County WRB
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Tolna Dam 1?
Tolna Dam 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 Tolna Dam 1?
Tolna Dam 1 is owned by Nelson County WRB (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tolna Dam 1 built?
Tolna Dam 1 was completed in 1936, making it 90 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 Tolna Dam 1?
Tolna Dam 1 serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tolna Dam 1?
Tolna Dam 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 Tolna Dam 1 last inspected?
Tolna Dam 1 was last inspected on May 9, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.