Ballard Pond Upper Dam is an earth dam located in Rockingham County, New Hampshire, built in 1935. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 7 ft7 ft tall and 120 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 Ballard Pond Upper Dam
The primary purpose of Ballard Pond Upper Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Dncr (state). It impounds the Taylor Brook near Derry.
The dam stands 7 feet tall and stretches 120 feet across, creates a reservoir covering 93 acres, has a maximum storage capacity of 415 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1935, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/18/2018.
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Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | Derry |
| River/Stream | Taylor Brook |
| Coordinates | 42.87681, -71.24327 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 120 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 415 acre-ft |
| Max Storage | 415 acre-ft |
| Normal Storage | 127 acre-ft |
| Surface Area | 93 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 514 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Dncr |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/18/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00184 |
| Federal ID | NH00184 |
| More Info | State Dam Safety Program |