Harantis Lake Dam
Harantis Lake Dam is a concrete dam located in Rockingham County, New Hampshire, built in 1930. It carries a Significant hazard potential classification and has a poor condition assessment.
About Harantis Lake Dam
The primary purpose of Harantis Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Harantis Lake Property Owners Assoc (private). It impounds the Beaver Brook near Chester.
The dam stands 14 feet tall and stretches 150 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 145 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1930, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 09/23/2022.
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Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | Chester |
| River/Stream | Beaver Brook |
| Coordinates | 42.93470, -71.28830 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 150 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 145 acre-ft |
| Max Storage | 145 acre-ft |
| Normal Storage | 77 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 329 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | HARANTIS LAKE PROPERTY OWNERS ASSOC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 09/23/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NH00337 |
| Federal ID | NH00337 |
| More Info | State Dam Safety Program |