Lake St George
Lake St George is a stone dam located in Waldo County, Maine, built in 1820. It carries a Significant hazard potential classification and has a fair condition assessment.
About Lake St George
The primary purpose of Lake St George is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Liberty (local government). It impounds the St. George.
The dam stands 15 feet tall and stretches 80 feet across, creates a reservoir covering 1,095 acres, has a maximum storage capacity of 6,400 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1820, the structure is one of the older dams in the region, with over a century and a half of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/09/2025.
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Location
| State | Maine |
| County | Waldo |
| River/Stream | St. George |
| Coordinates | 44.39522, -69.31140 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 80 ft |
| Year Completed | 1820 (206 years old) |
Storage & Hydraulics
| NID Storage | 6,400 acre-ft |
| Max Storage | 6,400 acre-ft |
| Normal Storage | 5,750 acre-ft |
| Surface Area | 1,095 acres |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Liberty |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/09/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00251 |
| Federal ID | ME00251 |
| More Info | State Dam Safety Program |