Access detailed information on electric power transmission lines in Cumberland County, Illinois, tailored specifically for GIS professionals managing power distribution projects. This dataset comprises pivotal data for two overhead AC transmission lines currently in service, highlighting critical infrastructure elements like voltage levels and ownership. For instance, the line from Hutsonville to Neoga, managed by Ameren Illinois Company, operates at a voltage of 138kV. Meanwhile, another significant transmission pathway runs between Casey West and Breed. These datasets are sourced from high-quality imagery and OpenStreetMap and are essential for anyone engaged in strategic planning and operations in electrical power transmission.