South Berwick
South Berwick is a concrete dam located in Strafford County, New Hampshire, built in 1923. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About South Berwick
The primary purpose of South Berwick 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 Consolidated Hydro New Hampshire, Inc. (private). It impounds the Salmon Falls River near Dover.
The dam stands 18 feet tall and stretches 290 feet across, creates a reservoir covering 58 acres, has a maximum storage capacity of 641 acre-feet, and collects water from a drainage area of 235 square miles. Completed in 1923, the structure is over a century old.
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 06/17/2022.
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Location
| State | New Hampshire |
| County | Strafford |
| Nearest City | Dover |
| River/Stream | Salmon Falls River |
| Coordinates | 43.22620, -70.81180 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 290 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 641 acre-ft |
| Max Storage | 641 acre-ft |
| Normal Storage | 641 acre-ft |
| Surface Area | 58 acres |
| Drainage Area | 235 sq mi |
| Max Discharge | 14,747 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Consolidated Hydro New Hampshire, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/17/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00395 |
| Federal ID | NH00395 |
| More Info | State Dam Safety Program |