Ayers Island
New Hampshire — Grafton County — Pemigewasset River
Location
| State | New Hampshire |
| County | Grafton |
| River | Pemigewasset River |
| Coordinates | 43.59779, -71.71751 |
Physical Characteristics
| NID Height | 80 ft |
| Dam Height | 80 ft |
| Dam Length | 699 ft |
| NID Storage | 10,000 acre-ft |
| Max Storage | 10,000 acre-ft |
| Surface Area | 800 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | July 26, 2022 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1924 |
| Primary Purpose | Hydroelectric |
| Dam Type | Concrete |
| Owner Type | Not Listed |
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.