Access detailed spatial datasets on US electric power transmission lines in Marion County, Texas, tailored for GIS professionals managing energy infrastructure projects. This dataset contains crucial information on the status, voltage, and ownership of overhead AC transmission lines. For instance, lines operated by Southwestern Electric Power Co demonstrate a voltage class of 345, highlighting their role in bulk power transmission. GIS experts can efficiently analyze data sourced from imagery and OpenStreetMap, updated as recently as 2020, to facilitate planning and operational decision-making. Whether evaluating the line from Southwest Shreveport to Diana or assessing Bowie-Cass Electric Coop's infrastructure, this resource provides valuable insights into the county's electrical grid configuration.