Mallison Falls
Key Takeaway
Mallison Falls is classified as significant hazard in Maine. It was completed in 1900 and is 126 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 14 ft (taller than 45.1% in ME) |
| Dam Length | 288 ft |
| Dam Type | Masonry |
| Max Storage | 30 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 503 sq mi |
| Max Discharge | 5,500 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | ME00325 |
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
Dichotomy Power Maine, LLC and Presumpcot Hydro, LLC
Private
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Significant Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Mallison Falls?
Mallison Falls 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 Mallison Falls?
Mallison Falls is owned by Dichotomy Power Maine, LLC and Presumpcot Hydro, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mallison Falls built?
Mallison Falls was completed in 1900, making it 126 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 Mallison Falls?
Mallison Falls serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mallison Falls?
Mallison Falls has a dam height of 14 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 Mallison Falls last inspected?
Mallison Falls was last inspected on July 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.