| Safe Harbor Dam | |
|---|---|
 The east end of the turbine hall for the Safe Harbor Dam housing the 25 Hz turbines. | |
| Official name | Safe Harbor Hydroelectric Station |
| Location | Manor Township, Lancaster County / Chanceford Township, York County, Pennsylvania, USA |
| Coordinates | 39°55′14″N 76°23′33″W / 39.92056°N 76.39250°W |
| Construction began | April 1, 1930 |
| Opening date | December 7, 1931 |
| Operator(s) | Brookfield Renewable Partners |
| Dam and spillways | |
| Type of dam | Gravity |
| Impounds | Susquehanna River |
| Height | 75 ft (23 m) |
| Length | 4,869 ft (1,484 m) |
| Spillway type | Service, controlled |
| Spillway capacity | 1,120,000 cu ft/s (31,715 m3/s) |
| Reservoir | |
| Creates | Lake Clarke |
| Power Station | |
| Turbines | 7 × 33.0 MW 5 × 37.5 MW 2 × 2 MW |
| Installed capacity | 422.5 MW |
The Safe Harbor Dam (also Safe Harbor Hydroelectric Station) is a concrete gravity dam, with an associated hydroelectric power station, on the lower Susquehanna River. It is the most northerly and last of three Great Depression-era public electrification projects' hydroelectric dams, and was constructed between April 1, 1930, and December 7, 1931. It created a long and relatively shallow lake, known as Lake Clarke, along the upper stretch of the Conejohela Valley. The creation of the lake shrank the upper Conejohela Flats in size.
Two of the turbine units are dedicated to generating for Amtrak's 25 Hz traction power system, and the facility also has a frequency converter available for conversion of power between 25 Hz and the 60 Hz used by the electric grid.