PacifiCorp is an electric power company based in the Lloyd Center Tower in Portland, Oregon with operations in the western United States. PacifiCorp has two business units: Pacific Power, a regulated electric utility with service territory throughout Oregon, northern California, and southeastern Washington headquartered in Portland, Oregon; and Rocky Mountain Power, a regulated electric utility with service territory throughout Utah, Wyoming, and southeastern Idaho, headquartered in Salt Lake City, Utah. PacifiCorp operates one of the largest privately held transmission systems in the U.S. within the western Energy Imbalance Market. Pacific Power and Rocky Mountain Power combined serve over 1.6 million residential customers, 202,000 commercial customers, and 37,000 industrial and irrigation customers, for a total of approximately 1,813,000 customers. The service area is 143,000 square miles. The company owns and maintains 16,500 miles of long-distance transmission lines, 64,000 miles of distribution lines, and 900 substations. PacifiCorp owns, maintains and operates generation assets and manages the commercial and trading operations of the company. Wikipedia