Macallen Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | NEWMARKET |
| River/Stream | LAMPREY RIVER |
| Coordinates | 43.08110, -70.93470 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 150 ft |
| Year Completed | 1887 (139 years old) |
Storage & Hydraulics
| NID Storage | 1,740 acre-ft |
| Max Storage | 1,740 acre-ft |
| Normal Storage | 480 acre-ft |
| Surface Area | 120 acres |
| Drainage Area | 211 sq mi |
| Max Discharge | 10,930 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF NEWMARKET |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/02/2022 |
| Emergency Action Plan | Yes |