Grafton Pond Dam
Key Takeaway
Grafton Pond Dam is classified as low hazard in New Hampshire. It was completed in 1918 and is 108 years old. Its primary use is recreation.
Physical Details
| Dam Height | 21 ft (taller than 74.5% in NH) |
| Dam Length | 285 ft |
| Dam Type | Concrete |
| Max Storage | 7.1K acre-ft |
| Normal Storage | 4.7K acre-ft |
| Surface Area | 324 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1918 (108 years old) |
| Year Modified | 1979 |
| NID ID | NH00119 |
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
Crystal Lake Dam
Grafton, NH
Significant Hazard 22 ftGeorge Pond Dam
Grafton, NH
High Hazard 11 ftWashburn Corners Dam
Sullivan, NH
Low Hazard 14 ftKilton Pond Dam
Grafton, NH
Low Hazard 12 ftCanaan Sewage Lagoon Dam
Grafton, NH
Significant Hazard 13 ftSmith Pond Dam
Grafton, NH
High Hazard 12 ftCanaan Street Lake Dam
Grafton, NH
Low Hazard 14 ftEastman Treatment Lagoons Dam
Sullivan, NH
Significant Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Grafton Pond Dam?
Grafton 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 Grafton Pond Dam?
Grafton Pond 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 Grafton Pond Dam built?
Grafton Pond Dam was completed in 1918, making it 108 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 Grafton Pond Dam?
Grafton 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 Grafton Pond Dam?
Grafton Pond Dam has a dam height of 21 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 Grafton Pond Dam last inspected?
Grafton Pond Dam was last inspected on May 8, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.