For GIS professionals focusing on utility infrastructure within Montana, our dataset provides a detailed inventory of electric power transmission lines across the region. Drawing from the 'US Electric Power Transmission Lines' dataset, users can find precise data on 58 overhead AC transmission lines, characterized by properties such as voltage level, operational status, and managing entities. Within the dataset, a variety of transmission corridors such as the Broadview to Garrison and Hemingway to Midpoint are detailed. Each entry confirms the presence and specifications of lines managed by key stakeholders like the Bonneville Power Administration and Northwestern Energy LLC. This database is geared to facilitate comprehensive analysis and planning for professionals engaged in energy distribution and infrastructure development tasks.