Grafton Pond Dam is a concrete dam located in Grafton County, New Hampshire, built in 1918. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 21 ft21 ft tall and 285 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Grafton Pond Dam
The primary purpose of Grafton Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Des Water Division (state). It impounds the Tr Bicknell Brook near Grafton.
The dam stands 21 feet tall and stretches 285 feet across, creates a reservoir covering 324 acres, has a maximum storage capacity of 7,100 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1918, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/08/2020.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Grafton |
| River/Stream | Tr Bicknell Brook |
| Coordinates | 43.58000, -72.04520 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 285 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 7,100 acre-ft |
| Max Storage | 7,100 acre-ft |
| Normal Storage | 4,700 acre-ft |
| Surface Area | 324 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Des Water Division |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/08/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00119 |
| Federal ID | NH00119 |
| More Info | State Dam Safety Program |