For GIS professionals focusing on utility management and planning in Putnam County, Illinois, our dataset presents a detailed look at the US Electric Power Transmission Lines currently in service. This dataset includes three entries, showcasing overhead AC transmission lines marked by their voltage class (100-161) and sourced primarily through various imagery methods. Notable properties such as the type and status of each line, alongside the organizations involved like Commonwealth Edison Co and Ameren Illinois Company, provide an informative perspective on regional energy infrastructure. With sources from Imagery and OpenStreetMap, to EIA 860 data recorded, these datasets are essential for accurate, updated geographical analyses and infrastructure development.