Lake Garrison Dam
Key Takeaway
Lake Garrison Dam is classified as significant hazard in New Jersey. It was completed in 1924 and is 102 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 7 ft (taller than 1.9% in NJ) |
| Dam Length | 500 ft |
| Dam Type | Earth |
| Max Storage | 152 acre-ft |
| Normal Storage | 89 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 41 cfs |
| Year Completed | 1924 (102 years old) |
| NID ID | NJ00778 |
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
Lake Garrison Inc.
Private
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High Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Lake Garrison Dam?
Lake Garrison Dam 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 Garrison Dam?
Lake Garrison Dam is owned by Lake Garrison Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Garrison Dam built?
Lake Garrison Dam was completed in 1924, making it 102 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 Garrison Dam?
Lake Garrison Dam 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 Garrison Dam?
Lake Garrison Dam 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 Lake Garrison Dam last inspected?
Lake Garrison Dam was last inspected on September 7, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.