Knowles Pond Dam
Key Takeaway
Knowles Pond Dam is classified as low hazard in New Hampshire. It was completed in 1935 and is 91 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 23.8% in NH) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 237 acre-ft |
| Normal Storage | 182 acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1935 (91 years old) |
| Year Modified | 2008 |
| NID ID | NH00367 |
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
TOWN OF NORTHFIELD
Local Government
Nearby Dams
Lochmere
Belknap, NH
Low Hazard 11 ftClement Dam
Belknap, NH
Significant Hazard 26 ftLyford Pond Dam
Merrimack, NH
Significant Hazard 15 ftNew Pond Dam
Merrimack, NH
Low Hazard 13 ftFountain Pond Center Dam
Merrimack, NH
Low Hazard 14 ftRunaway Pond East Dam
Merrimack, NH
Significant Hazard 15 ftFifield Farm Pond Dam
Merrimack, NH
Low Hazard 13 ftStevens Mill
Merrimack, NH
Significant Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Knowles Pond Dam?
Knowles Pond 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 Knowles Pond Dam?
Knowles Pond Dam is owned by TOWN OF NORTHFIELD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Knowles Pond Dam built?
Knowles Pond Dam was completed in 1935, making it 91 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 Knowles Pond Dam?
Knowles Pond 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 Knowles Pond Dam?
Knowles Pond Dam has a dam height of 11 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 Knowles Pond Dam last inspected?
Knowles Pond Dam was last inspected on September 5, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.