Ballard Pond Mill Dam
Ballard Pond Mill Dam is an earth dam located in Rockingham County, New Hampshire, built in 1941. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Ballard Pond Mill Dam
The primary purpose of Ballard Pond Mill 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 Taylor Brook near Derry.
The dam stands 21 feet tall and stretches 300 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 61 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1941, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/15/2020.
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Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | Derry |
| River/Stream | Taylor Brook |
| Coordinates | 42.87590, -71.23941 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 300 ft |
| Year Completed | 1941 (85 years old) |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Max Storage | 61 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,348 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH DES WATER DIVISION |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/15/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00183 |
| Federal ID | NH00183 |
| More Info | State Dam Safety Program |