Marin County, California, serves as a unique focal point for GIS professionals monitoring the intricate details of US Electric Power Transmission Lines. This dataset, housing data on two transmission lines, one overhead AC and another underground DC, offers crucial insights for utility management and infrastructure development. Both features detail aspects like voltage, ownership (one being Pacific Gas & Electric Company), and their endpoints, such as Lakeville to Sobrante, and Pittsburg to Trans Bay Cable Facility respectively. This information underscores the infrastructure's operational status and localization within the specific service areas of Marin County, optimizing usability for localized projects and analysis.