Coffin Pond Dam is an earth dam located in Grafton County, New Hampshire, built in 1960. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 320 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Coffin Pond Dam
The primary purpose of Coffin 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 Fish and Game Department (state). It impounds the Tr Gale River near Sugar Hill.
The dam stands 10 feet tall and stretches 320 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1960, the structure is well into its service life at over 50 years 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/28/2019.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Sugar Hill |
| River/Stream | Tr Gale River |
| Coordinates | 44.24193, -71.76691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 320 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 194 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Fish and Game Department |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/28/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00574 |
| Federal ID | NH00574 |
| More Info | State Dam Safety Program |