Lake Mattawa South Dam
Massachusetts — Franklin County — Middle Branch of Swift River
Location
| State | Massachusetts |
| County | Franklin |
| River | Middle Branch of Swift River |
| Coordinates | 42.56281, -72.31671 |
Physical Characteristics
| NID Height | 10 ft |
| Dam Height | — |
| Dam Length | 287 ft |
| NID Storage | 928 acre-ft |
| Max Storage | 928 acre-ft |
| Surface Area | 130 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Poor |
| EAP Status | Yes |
| Last Inspection | November 19, 2021 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1893 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | Town of Orange |
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.