Heron Lake Outlet
Key Takeaway
Heron Lake Outlet is classified as low hazard in Minnesota. It was completed in 1937 and is 89 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 7 ft (taller than 8.5% in MN) |
| Dam Length | 133 ft |
| Dam Type | Gravity |
| Max Storage | 100.0K acre-ft |
| Normal Storage | 72.6K acre-ft |
| Surface Area | 2,845 acres |
| Drainage Area | 448 sq mi |
| Max Discharge | 4,889 cfs |
| Year Completed | 1937 (89 years old) |
| Year Modified | 2000 |
| NID ID | MN00115 |
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
MNDNR-Wildlife
State Government
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Low Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Heron Lake Outlet?
Heron Lake Outlet 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 Heron Lake Outlet?
Heron Lake Outlet is owned by MNDNR-Wildlife (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Heron Lake Outlet built?
Heron Lake Outlet was completed in 1937, making it 89 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 Heron Lake Outlet?
Heron Lake Outlet serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Heron Lake Outlet?
Heron Lake Outlet has a dam height of 7 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 Heron Lake Outlet last inspected?
Heron Lake Outlet was last inspected on November 15, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.