Access comprehensive data on Electric Power Transmission Lines in Mason County, Illinois, ideal for GIS projects focused on utility infrastructure. This dataset contains detailed information about three overhead AC transmission lines, all currently in service with a voltage class of 345. Notable entries include lines connecting Goodings Grove to Powerton Station and Top Crop to Powerton Station, outlined with attributes such as ownership (Ameren Illinois Company and unknown), verification through imagery, and source details. These datasets, sourced and verified between 2015 and 2018, support professionals in electrical power planning and geographical analysis.