Hermit Lake Dam
Key Takeaway
Hermit Lake Dam is classified as low hazard in New Hampshire. It was completed in 1927 and is 99 years old. Its primary use is recreation.
Physical Details
| Dam Height | 20 ft (taller than 70.9% in NH) |
| Dam Length | 1,320 ft |
| Dam Type | Earth |
| Max Storage | 1.9K acre-ft |
| Normal Storage | 1.2K acre-ft |
| Surface Area | 220 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 3,343 cfs |
| Year Completed | 1927 (99 years old) |
| Year Modified | 1981 |
| NID ID | NH00033 |
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
NH DES WATER DIVISION
State Government
Nearby Dams
Mountain Pond South Dam
Belknap, NH
Low Hazard 7 ftMountain Pond North Dam
Belknap, NH
Low Hazard 14 ftGordon Hill Water Supply Dam
Belknap, NH
Significant Hazard 15 ftDickerman Pond Dam
Belknap, NH
Significant Hazard 20 ftNew Hampton Village Prct Ww Lagoon
Belknap, NH
Significant Hazard 9 ftGiles Pond
Merrimack, NH
Low Hazard 18 ftLake Wicwas Dam
Belknap, NH
Low Hazard 7 ftFranklin Falls Dam
Merrimack, NH
High Hazard 116 ftFrequently Asked Questions
What is the hazard classification of Hermit Lake Dam?
Hermit Lake Dam 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 Hermit Lake Dam?
Hermit Lake Dam is owned by NH DES WATER DIVISION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hermit Lake Dam built?
Hermit Lake Dam was completed in 1927, making it 99 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 Hermit Lake Dam?
Hermit Lake 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 Hermit Lake Dam?
Hermit Lake Dam has a dam height of 20 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 Hermit Lake Dam last inspected?
Hermit Lake Dam was last inspected on April 19, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.