Lewiston Falls is a masonry dam located in Androscoggin County, Maine, built in 1865. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 27 ft27 ft tall and 955 ft long, taller than 59% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Lewiston Falls
The primary purpose of Lewiston Falls 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 Brookfield Renewable Power LLC Nyro. It impounds the Androscoggin River near Lewiston - Auburn.
The dam stands 27 feet tall and stretches 955 feet across, creates a reservoir covering 200 acres, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 2,901 square miles. Completed in 1865, the structure is one of the older dams in the region, with over a century and a half of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/17/2018.
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Location
| State | Maine |
| County | Androscoggin |
| Nearest City | Lewiston - Auburn |
| River/Stream | Androscoggin River |
| Coordinates | 44.10143, -70.22291 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 955 ft |
| Year Completed | 1865 (161 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 1,600 acre-ft |
| Surface Area | 200 acres |
| Drainage Area | 2,901 sq mi |
| Max Discharge | 8,050 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Brookfield Renewable Power LLC Nyro |
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/17/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00005 |
| Federal ID | ME00005 |
| More Info | State Dam Safety Program |