AmerenUE. The Company's principal activities are to provide electric and gas services in Missouri and Illinois. The Company is a wholly owned subsidiary of Ameren Corporation. The Company generates, transmits, distributes and sells electric energy. The Company also purchases, distributes, transports and sells natural gas. The Company supplies electric service in territories of Missouri and Illinois having an estimated population of 2,600,000 within an area of approximately 24,500 square miles, including the greater St. Louis area. Retail gas utility service is supplied in 90 Missouri communities and in the City of Alton, Illinois and vicinity. The Company supplies electric service to about 1.2 million customers and natural gas service to about 130,000 customers. Electric energy accounted for 95% of 2002 revenues and other, 5%.