The Past, Present and Future of Dams in the Southeastern U.S

Dams and reservoirs have played a central role in the industrialization and economic development of the United States, providing hydropower, flood control, navigation, water supply, and recreation. Yet they have also transformed river systems, displaced communities, and contributed to major ecological change. This paper presents an exploratory review of the history, present status, and future of dams in the Southeastern United States, focusing on U.S. Geological Survey hydrologic regions 3 (South Atlantic-Gulf) and 6 (Tennessee). Using data from the National Inventory of Dams, historical archives, and interdisciplinary literature, the study examines temporal trends in dam construction, societal and ecological impacts, hazard conditions, and emerging trends in dam management. The Southeastern U.S. contains some of the nation's highest dam densities and storage capacities, with more than 19,000 inventoried dams as of 2026. Many dams were constructed during the mid-twentieth century through the New Deal and postwar infrastructure programs led by the Tennessee Valley Authority and the U.S. Army Corps of Engineers. This aging infrastructure, in combination with inconsistent regulation, and increasing exposure to extreme weather raises growing safety concerns, particularly for the many high-hazard dams in poor or unrated conditions in the region. The paper also explores future trajectories, including hydropower modernization, pumped storage expansion, and dam removal efforts aimed at balancing renewable energy production, ecological restoration, and public safety.