Cousins to the gladiola, these are hardy plants that produce clumps of green sword-shaped leaves, with tall, arching spikes of funnel-shaped blossoms appearing in mid to late summer.
The 10 biggest U.S. electric utilities visualized. Duke Energy's merger with Progress Energy, completed in July 2012, created the largest electric utility in the United States. In fact, two of the three largest U.S. utilities are the result of recent mergers. Exelon, third on the list of the 10 biggest U.S. utilities, merged with Constellation Energy in March 2012. Duke will now service 7 million retail customers across six states.
Puget Sound Energy is the largest energy utility in the state, providing electric power to more than 1 million customers. Approximately 46 percent of the electricity PSE customers use comes from our own power plants. We currently have more than 3,500 megawatts of power-generating capacity. We purchase the rest of our power supply from a variety of other utilities, independent power producers and energy marketers across the western United States and Canada.