Access detailed data on electric power transmission lines within Nassau County, Florida, aimed at assisting GIS professionals with precise project planning. This dataset includes 5 features describing overhead AC transmission lines that are currently in service. Key attributes for each feature encompass the owning entity such as JEA or Georgia Power Co, operational voltages prominently at 500 and 230 kV, and verification sources, primarily consisting of imagery and state-level documentation. Engage with the varying electrical infrastructure spread across pivotal locations, including Poinsett, Yulee, and Naval Submarine Base Kings Bay. Each dataset entry meticulously outlines the structural and operational details, which are beneficial for comprehensive spatial analysis and regional planning in the realm of electric power distribution.