Upper Flannagan Pond Dam
Massachusetts — Middlesex County — Tributary of Nonacocus Brook
Location
| State | Massachusetts |
| County | Middlesex |
| River | Tributary of Nonacocus Brook |
| Coordinates | 42.56209, -71.57397 |
Physical Characteristics
| NID Height | 9 ft |
| Dam Height | — |
| Dam Length | 30 ft |
| NID Storage | 110 acre-ft |
| Max Storage | 110 acre-ft |
| Surface Area | 23 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Poor |
| EAP Status | No |
| Last Inspection | November 5, 2021 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1955 |
| Primary Purpose | Recreation |
| Dam Type | — |
| Owner Type | Local Government |
| Owner | Town of Ayer |
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.