Hopkinton Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | WEST HOPKINTON |
| River/Stream | CONTOOCOOK RIVER |
| Coordinates | 43.18863, -71.74764 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 71 ft |
| Dam Height | 71 ft |
| Dam Length | 790 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 128,000 acre-ft |
| Max Storage | 128,000 acre-ft |
| Normal Storage | 700 acre-ft |
| Surface Area | 220 acres |
| Drainage Area | 382 sq mi |
| Max Discharge | 59,700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - New England District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 11/02/2021 |
| Emergency Action Plan | Yes |