Armington Lake Dam
Armington Lake Dam is a concrete dam located in Grafton County, New Hampshire, built in 1900. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Armington Lake Dam
The primary purpose of Armington Lake 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 Eastman Brook near Piermont.
The dam stands 9 feet tall and stretches 220 feet across, creates a reservoir covering 159 acres, has a maximum storage capacity of 2,678 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1900, the structure is over a century old.
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 11/05/2020.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Piermont |
| River/Stream | Eastman Brook |
| Coordinates | 43.96800, -71.96660 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 220 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 2,678 acre-ft |
| Max Storage | 2,678 acre-ft |
| Normal Storage | 549 acre-ft |
| Surface Area | 159 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,900 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH FISH AND GAME DEPARTMENT |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/05/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00460 |
| Federal ID | NH00460 |
| More Info | State Dam Safety Program |