Lake Riley
Key Takeaway
Lake Riley is classified as unknown in Minnesota. It was completed in 1958 and is 68 years old. Its primary use is recreation.
Physical Details
| Dam Height | 5 ft (taller than 1% in MN) |
| Dam Length | 20 ft |
| Dam Type | Gravity |
| Max Storage | 3.9K acre-ft |
| Normal Storage | 3.0K acre-ft |
| Surface Area | 296 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 350 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | MN00411 |
Safety Information
Hazard potential has not been determined.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
MNDNR
State Government
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Lake Riley?
Lake Riley is classified as Unknown. Hazard potential has not been determined. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lake Riley?
Lake Riley is owned by MNDNR (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Riley built?
Lake Riley was completed in 1958, making it 68 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 Riley?
Lake Riley 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 Lake Riley?
Lake Riley has a dam height of 5 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 Riley last inspected?
Lake Riley was last inspected on December 8, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.