The Solina Dam is the largest dam and hydroelectric plant in Poland. It is located in Lesko County in the Bieszczady Mountains area of south-eastern Poland.The dam is 664 m (2,178 ft) long, 12 m (39 ft) across, and 82 m (269 ft) high. Its construction created the largest artificial lake in Poland-Lake Solina. It has four turbines which were initially capable of generating 136 MW of electricity.Two of the turbines can also reverse flow to optimize power generation. Starting in 1995 efforts have been made to modernize the power plant.