In this study, the installation objectives and impacts of Turkey's two major multidam transboundary hydropower projects, Southeastern Anatolia (Euprathes and Tigris Rivers) and Northeastern Anatolia (Coruh River) Projects, are discussed. Southeastern Anatolia Project (GAP) having 22 dams and 19 hydropower plants is the large-scale water management program aiming to increase the domestic electricity production and develop vast irrigation schemes for agriculture. Coruh River is the longest river in the east Black Sea region, having high economic importance to Turkey because of its largely undeveloped but economically exploitable hydropower potential. Coruh multiple dams project consists of 27 planned dams and hydroelectric power plants. Besides numerous expected benefits from these projects, also a multitude of substantial social, economic, and environmental impact potentials exist.