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NINETY NINE ISLANDS

RESERVOIR LEVELS
Rock Dam Broad
April 13, 2025


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Ninety Nine Islands is a stunning hydroelectric dam located in South Carolina, specifically in the city of Lockhart. Built in 1909 by the Southern Power Company, this concrete gravity dam stands at a height of 72 feet and stretches 1568 feet in length. With a storage capacity of 2300 acre-feet and a maximum discharge of 145,000 cubic feet per second, this dam plays a crucial role in power generation and water management in the region.

The dam's high hazard potential and moderate risk assessment highlight the importance of its maintenance and emergency preparedness. The Federal Energy Regulatory Commission oversees its operations and inspections, ensuring its structural integrity and adherence to safety protocols. The surrounding area, including the Broad River and its drainage area of 1550 square miles, benefits from the dam's regulation of water flow and storage capacity.

Enthusiasts of water resources and climate change will appreciate the significance of Ninety Nine Islands in providing renewable hydropower and managing water resources in Cherokee County, South Carolina. Its historical significance, engineering marvel, and environmental impact make it a fascinating site for exploration and study in the realm of water resource management and climate resilience.

Year_Completed 1909
Dam_Height 72
River_Or_Stream Broad
Dam_Length 1568
Primary_Dam_Type Concrete
Surface_Area 350
Drainage_Area 1550
Nid_Storage 2300
Structural_Height 72
Hazard_Potential High
Foundations Rock
Nid_Height 72
       

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