Grand Lake (matagamon)
High HazardPoor ConditionEmergency Action Plan: Yes
Location
| State | Maine |
| County | Penobscot |
| River/Stream | Penobscot River |
| Coordinates | 46.14110, -68.79044 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 218 ft |
| Year Completed | 1941 (85 years old) |
Storage & Hydraulics
| NID Storage | 45,800 acre-ft |
| Max Storage | 45,800 acre-ft |
| Normal Storage | 41,400 acre-ft |
| Surface Area | 4,200 acres |
| Drainage Area | 485 sq mi |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Mattagamon Lake Association |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 11/12/2021 |
| Emergency Action Plan | Yes |