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.
Westar Energy Customer Login Westar Energy is the largest electric utility provider in Kansas, delivering electricity to nearly 700,000 residential and business customers in 55 counties. Over 2,400 employees keep the electricity flowing day and night, providing reliable power and comfort to our friends and neighbors throughout eastern Kansas.