Lake Grace
Key Takeaway
Lake Grace is classified as significant hazard in Minnesota. It was completed in 1968 and is 58 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 82.5% in MN) |
| Dam Length | 100 ft |
| Dam Type | Earth |
| Max Storage | 900 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 100 cfs |
| Year Completed | 1968 (58 years old) |
| Year Modified | 1994 |
| NID ID | MN00808 |
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
City of Chaska
Local Government
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Lake Grace?
Lake Grace 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 Lake Grace?
Lake Grace is owned by City of Chaska (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Grace built?
Lake Grace was completed in 1968, making it 58 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 Lake Grace?
Lake Grace serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Grace?
Lake Grace 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 Lake Grace last inspected?
Lake Grace was last inspected on October 24, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.