Established in 1981, Golden State Utility Company is a full-service outside plant contractor that serves the telecommunications industry in California and Nevada. The company handles the installation of fiber-optic cables for long-distance carriers throughout the western United States. It specializes in rock wheel trenching, aerial cable construction and demolition, civil site construction, fiber and copper splicing and testing, and horizontal and directional boring. Golden State Utility Company also offers a range of underground utility locating services. It provides various ongoing maintenance and emergency restoration solutions. The company additionally operates an aerial division. Golden State Utility Company is a subsidiary of Quanta Services.