Access comprehensive data on electric power transmission lines in Harrison County, Ohio, essential for GIS projects in power distribution and infrastructure analysis. This dataset covers four overhead, alternating current transmission lines currently in service. Each entry details the voltage classes—ranging from under 100 to 345 kV—alongside ownership information from entities like Ohio Power Co and American Electric Power Co., Inc. Notably, the sources draw from current imagery and reliable documentation to ensure up-to-date spatial accuracy, providing key substations like Tidd and Carrollton for context. This dataset serves as a dependable resource for professionals engaged in electrical grid mapping and planning in Harrison County.