Island Pond Dam
Key Takeaway
Island Pond Dam is classified as low hazard in New Hampshire. It was completed in 1861 and is 165 years old. Its primary use is recreation.
Physical Details
| Dam Height | 13 ft (taller than 36.5% in NH) |
| Dam Length | 120 ft |
| Dam Type | Earth |
| Max Storage | 4.1K acre-ft |
| Normal Storage | 2.9K acre-ft |
| Surface Area | 194 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 185 cfs |
| Year Completed | 1861 (165 years old) |
| Year Modified | 1934 |
| NID ID | NH00235 |
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
WASHINGTON LAKE ASSOCIATION
Private
Nearby Dams
Pioneer Lake Dam
Cheshire, NH
Low Hazard 17 ftMillen Lake Dam
Sullivan, NH
Significant Hazard 23 ftBlack Pond Dam
Hillsborough, NH
Low Hazard 10 ftHidden Pond Dam
Cheshire, NH
Low Hazard 16 ftMay Pond Dam
Sullivan, NH
Significant Hazard 14 ftLong Pond Dam
Sullivan, NH
Low Hazard 10 ftHighland Lake Dam
Cheshire, NH
High Hazard 11 ftRichardson Brook Pond Dam
Sullivan, NH
Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Island Pond Dam?
Island 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 Island Pond Dam?
Island Pond Dam is owned by WASHINGTON LAKE ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Island Pond Dam built?
Island Pond Dam was completed in 1861, making it 165 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 Island Pond Dam?
Island 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 Island Pond Dam?
Island Pond Dam has a dam height of 13 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 Island Pond Dam last inspected?
Island Pond Dam was last inspected on May 8, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.