Hopkinton Dam - Dike H-2
New Hampshire — Merrimack County — Elm Brook
Location
| State | New Hampshire |
| County | Merrimack |
| River | Elm Brook |
| Coordinates | 43.18956, -71.73440 |
Physical Characteristics
| NID Height | 77 ft |
| Dam Height | 77 ft |
| Dam Length | 5,220 ft |
| NID Storage | 131,000 acre-ft |
| Max Storage | 131,000 acre-ft |
| Surface Area | 220 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | November 2, 2021 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1962 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Federal |
| Owner | USACE - New England District |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.