Stump Pond Dam is an earth dam located in Hillsborough, New Hampshire, built in 1938. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 16 ft16 ft tall and 250 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 Stump Pond Dam
The primary purpose of Stump Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town of Merrimack (local government). It impounds the Farley Brook near Merrimack.
The dam stands 16 feet tall and stretches 250 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 143 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1938, the structure is well-established, with more than 75 years of service.
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 10/13/2022.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Merrimack |
| River/Stream | Farley Brook |
| Coordinates | 42.80515, -71.55803 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 250 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 143 acre-ft |
| Max Storage | 143 acre-ft |
| Normal Storage | 47 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 539 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Merrimack |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/13/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00505 |
| Federal ID | NH00505 |
| More Info | State Dam Safety Program |