Kentucky Dam

Kentucky Dam. It is a major gravity dam on the Tennessee River constructed by the Tennessee Valley Authority (TVA) as the final project in the TVA system. Completed in 1944, it created Kentucky Lake, the largest artificial lake by surface area in the Eastern United States. The dam serves critical national purposes in flood control, hydroelectric power generation, and improving commercial navigation on the inland waterway system.

History

The impetus for its construction stemmed from the devastating Great Mississippi Flood of 1927 and the broader national development goals of the New Deal under President Franklin D. Roosevelt. Authorized by the Flood Control Act of 1938, the project was a direct response to the need for comprehensive river management in the Ohio River and Lower Mississippi River basins. Construction began in 1938, with the Tennessee Valley Authority overseeing the massive undertaking, which required significant land acquisition and the relocation of communities like Birmingham, Kentucky. The dam's completion during World War II was strategically vital, providing immense electrical power for war production facilities, including the nearby Oak Ridge National Laboratory which supported the Manhattan Project.

Construction and design

The structure is a massive concrete gravity dam stretching 8,422 feet long and reaching 206 feet in height. Its construction involved pouring over 1.8 million cubic yards of concrete and required the excavation of 14.5 million cubic yards of earth and rock. A key engineering challenge was founding the dam on stable limestone bedrock, which necessitated extensive grouting operations to seal fissures. The dam's spillway section is equipped with 23 tainter gates to manage reservoir levels and control floodwaters. The powerhouse, integrated into the dam, was originally fitted with five Francis turbine generators, with additional units added later to increase capacity.

Operations and purpose

Primary operations are managed by the Tennessee Valley Authority for three core purposes: flood control, hydroelectric generation, and navigation. The dam's reservoir, Kentucky Lake, provides crucial flood storage capacity, helping to regulate flow on the Tennessee River, Ohio River, and Mississippi River. The powerhouse has a generating capacity of 223 MW, contributing to the TVA power grid. For navigation, the dam features a lock that is 110 feet wide by 600 feet long, integral to the Tennessee-Tombigbee Waterway and the Gulf Intracoastal Waterway, allowing barge traffic to travel from Paducah, Kentucky to the Gulf of Mexico. The reservoir also supports major recreational activities and wildlife management.

Environmental impact

The creation of Kentucky Lake transformed the local environment, inundating over 160,000 acres of river valley, which altered terrestrial habitats and displaced wildlife. This led to significant changes in fish populations and the establishment of new aquatic ecosystems. The dam also affects water temperature and dissolved oxygen levels downstream, which can impact native species. In response, the Tennessee Valley Authority and agencies like the Kentucky Department of Fish and Wildlife Resources manage fish stocking programs and monitor water quality. The reservoir's shores are home to protected areas like Land Between the Lakes National Recreation Area, managed by the United States Forest Service.

See also

* Tennessee Valley Authority * Kentucky Lake * Pickwick Landing Dam * Land Between the Lakes National Recreation Area * History of the Tennessee Valley Authority

Category:Dams in Kentucky Category:Tennessee Valley Authority Category:Buildings and structures in Marshall County, Kentucky Category:Dams completed in 1944