Access detailed information on electric power transmission lines in Chester County, Pennsylvania, ideal for GIS professionals working on regional energy distribution projects. This dataset contains precise data on five overhead AC transmission lines, all currently in service, each meticulously documented with source dates and methods primarily based on imagery and supplemented by OpenStreetMap. The entries include notable substations like Hosensack and Three Mile Island, with voltage classes prominently at 500 KV, supporting bulk power transmission and control. Each line listing offers insights into the operational status, ownership — where available — and significant geographical details useful for mapping and analysis tasks, providing a robust foundation for accurate spatial representation and decision-making in the realm of electric power infrastructure.